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Antaky, Carmen C., Emily E. Conklin, Robert J. Toonen, Ingrid S. S. Knapp y Melissa R. Price. "Unexpectedly high genetic diversity in a rare and endangered seabird in the Hawaiian Archipelago". PeerJ 8 (6 de febrero de 2020): e8463. http://dx.doi.org/10.7717/peerj.8463.
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Seabirds in the order of Procellariiformes have one of the highest proportions of threatened species of any avian order. Species undergoing recovery may be predicted to have a genetic signature of a bottleneck, low genetic diversity, or higher rates of inbreeding. The Hawaiian Band-rumped Storm Petrel (‘Akē‘akē; Hydrobates castro), a long-lived philopatric seabird, suffered massive population declines resulting in its listing under the Endangered Species Act in 2016 as federally Endangered. We used high-throughput sequencing to assess patterns of genetic diversity and potential for inbreeding in remaining populations in the Hawaiian Islands. We compared a total of 24 individuals, including both historical and modern samples, collected from breeding colonies or downed individuals found on the islands of Kaua‘i, O‘ahu, Maui, and the Big Island of Hawai‘i. Genetic analyses revealed little differentiation between breeding colonies on Kaua‘i and the Big Island colonies. Although small sample sizes limit inferences regarding other island colonies, downed individuals from O‘ahu and Maui did not assign to known breeding colonies, suggesting the existence of an additional distinct breeding population. The maintenance of genetic diversity in future generations is an important consideration for conservation management. This study provides a baseline of population structure for the remaining nesting colonies that could inform potential translocations of the Endangered H. castro.
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Pratt, Thane K., John C. Simon, Brian P. Farm, Kim E. Berlin y James R. Kowalsky. "Home Range and Territoriality of Two Hawaiian Honeycreepers, the ‘ĀKohekohe and Maui Parrotbill". Condor 103, n.º 4 (1 de noviembre de 2001): 746–55. http://dx.doi.org/10.1093/condor/103.4.746.
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Abstract Hawaiian honeycreepers have radiated into a diversity of trophic niches and patterns of space-use. We investigated space-use in two honeycreeper species, the ‘Ākohekohe (Palmeria dolei), an endangered nectarivore, and Maui Parrotbill (Pseudonestor xanthophrys), an endangered wood excavator, by mapping the home ranges and dispersion of color-banded individuals at a study site in relatively undisturbed montane cloud forest on Maui Island, Hawai‘i. With 20% of outlying points excluded, home-range size averaged much smaller for adult male ‘Ākohekohe (0.56 ha) than for male Maui Parrotbill (2.26 ha). In both species, a female's home range mostly overlapped that of her mate. Adult male Maui Parrotbill defended year-round home ranges from which they excluded conspecifics except for their mates and dependent offspring. Although our data suggest that ‘Ākohekohe also maintained all-purpose territories, the evidence is less convincing because these birds were seen feeding in the home ranges of other individuals. By defending all-purpose territories, these two species depart from the more common honeycreeper pattern of sharing large, undefended home ranges. Rango de Hogar y Territorialidad en Dos Mieleros de Hawai, Palmeria dolei y Pseudonestor xanthophrys Resumen. Los mieleros de Hawai han radiado en una gran diversidad de nichos tróficos y patrones de uso del espacio. Investigamos el uso del espacio en dos especies amenazadas de mieleros, Palmeria dolei, un nectarívoro, y Pseudonestor xanthophrys, un excavador de madera. Mapeamos los rangos de hogar y dispersión de individuos marcadas con bandas de colores en un sitio relativamente no perturbado de bosque montano nublado, en la Isla Maui, Hawai. Excluyendo el 20% de los valores extremos, el tamaño promedio de los rangos de hogar de los machos adultos de P. dolei fue mucho menor (0.56 ha) que el de los machos de P. xanthophrys (2.26 ha). En ambas especies, el rango de hogar de la hembra se sobrepuso en gran parte al rango del macho. Los machos adultos de P. xanthophrys defendieron su territorio durante todo el año excluyendo a individuos conespecíficos con excepción de sus parejas y crías dependientes. A pesar que nuestros datos indican que P. dolei también mantuvo territorios, la evidencia es menos convincente debido a que estas aves fueron observadas forrajeando en rangos de hogar de otros individuos. Las dos especies estudiadas defienden sus territorios, lo cual las diferencia del patrón común observado en los mieleros, que consiste en compartir extensos rangos de hogar no defendidos.
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LOOPE, LLOYD, FOREST STARR y KIM STARR. "Protecting Endangered Plant Species from Displacement by Invasive Plants on Maui, Hawaii1". Weed Technology 18, sp1 (diciembre de 2004): 1472–74. http://dx.doi.org/10.1614/0890-037x(2004)018[1472:pepsfd]2.0.co;2.
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Mounce, Hanna L., Christopher C. Warren, Conor P. McGowan, Eben H. Paxton y Jim J. Groombridge. "Extinction Risk and Conservation Options for Maui Parrotbill, an Endangered Hawaiian Honeycreeper". Journal of Fish and Wildlife Management 9, n.º 2 (9 de mayo de 2018): 367–82. http://dx.doi.org/10.3996/072017-jfwm-059.
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Abstract Extinction rates for island birds around the world have been historically high. For forest passerines, the Hawaiian archipelago has suffered some of the highest extinction rates and reintroduction is a conservation tool that can be used to prevent the extinction of some of the remaining endangered species. Population viability analyses can be used to assess risks to vulnerable populations and evaluate the relative benefits of conservation strategies. Here we present a population viability analysis to assess the long-term viability for Maui parrotbill (Kiwikiu) Pseudonestor xanthophrys, a federally endangered passerine on the Hawaiian island of Maui. Contrary to indications from population monitoring, our results indicate Maui parrotbills may be unlikely to persist beyond 25 y. Our modeling suggests female mortality as a primary factor driving this decline. To evaluate and compare management options involving captive-rearing and translocation strategies we made a female-only stage-structured, meta-population simulation model. Maui parrotbills have low reproductive potential in captivity; therefore, the number of individuals (∼20% of the global population) needed to source a reintroduction solely from captive reared birds is unrealistic. A reintroduction strategy that incorporates a minimal contribution from captivity and instead translocates mostly wild individuals was found to be the most feasible management option. Habitat is being restored on leeward east Maui, which may provide more favorable climate and habitat conditions and promote increased reproductive output. Our model provides managers with benchmarks for fecundity and survival needed to ensure reintroduction success, and highlights the importance of establishing a new population in potentially favorable habitat to ensure long-term persistence.
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Pinzari, Corinna A., Lin Kang, Pawel Michalak, Lars S. Jermiin, Donald K. Price y Frank J. Bonaccorso. "Analysis of Genomic Sequence Data Reveals the Origin and Evolutionary Separation of Hawaiian Hoary Bat Populations". Genome Biology and Evolution 12, n.º 9 (27 de agosto de 2020): 1504–14. http://dx.doi.org/10.1093/gbe/evaa137.
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Abstract We examine the genetic history and population status of Hawaiian hoary bats (Lasiurus semotus), the most isolated bats on Earth, and their relationship to northern hoary bats (Lasiurus cinereus), through whole-genome analysis of single-nucleotide polymorphisms mapped to a de novo-assembled reference genome. Profiles of genomic diversity and divergence indicate that Hawaiian hoary bats are distinct from northern hoary bats, and form a monophyletic group, indicating a single ancestral colonization event 1.34 Ma, followed by substantial divergence between islands beginning 0.51 Ma. Phylogenetic analysis indicates Maui is central to the radiation across the archipelago, with the southward expansion to Hawai‘i and westward to O‘ahu and Kaua‘i. Because this endangered species is of conservation concern, a clearer understanding of the population genetic structure of this bat in the Hawaiian Islands is of timely importance.
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R. Malcolm, Trent, Kirsty J. Swinnerton, Jim J. Groombridge, Bill D. Sparklin, Christopher N. Brosius, John P. Vetter y Jeffrey T. Foster. "Ground-based rodent control in a remote Hawaiian rainforest on Maui". Pacific Conservation Biology 14, n.º 3 (2008): 206. http://dx.doi.org/10.1071/pc080206.
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Effective control of introduced mammalian predators is essential to the recovery of native bird species in Hawai?i. Between August 1996 and December 2004, introduced rodents were controlled within three home ranges of the Po?ouli Melamprosops phaeosoma, a critically endangered Hawaiian honeycreeper. Rats were controlled using a combination of ground-based rodenticide (0.005% diphacinone) application and snap traps. Beginning in August 2001, we monitored the effectiveness of these rodent control efforts. Relative abundances of Black Rats Rattus rattus and Polynesian Rats R. exulans were measured in each of five snap-trapping grids seven times over a 35-month period. Rat populations decreased inside of the rodent control areas, but control effectiveness differed between rat species. During the first year of monitoring, target control levels for R. rattus were consistently achieved in only one of the rodent control areas. Control techniques were refined in areas failing to meet targets. Subsequently, we achieved target control levels for R. rattus more consistently in all three rodent control areas. However, relative abundances of R. exulans did not differ between rodent control and reference areas, indicating that our rodent control techniques were insufficient to reduce population levels of this species. These findings signify a need for further improvement of rodent control methods in Hawai?i, especially for Polynesian Rats, and demonstrate the critical importance of periodic monitoring of the response of rodent populations to management. In the future, managers may need to design rodent control operations targeting R. rattus and R. exulans independently to achieve best results.
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MOUNCE, HANNA L., KELLY J. IKNAYAN, DAVID L. LEONARD, KIRSTY J. SWINNERTON y JIM J. GROOMBRIDGE. "Management implications derived from long term re-sight data: annual survival of the Maui Parrotbill Pseudonestor xanthophrys". Bird Conservation International 24, n.º 3 (29 de octubre de 2013): 316–26. http://dx.doi.org/10.1017/s0959270913000476.
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SummaryThe accurate estimation of key demographic parameters is invaluable for making decisions about the management of endangered wildlife but such estimates are often difficult to obtain. Parameters such as species-specific apparent survival rates are an important component in understanding population ecology and informing management decisions. The Maui Parrotbill Pseudonestor xanthophrys is a ‘Critically Endangered’ Hawaiian honeycreeper endemic to the Island of Maui. We used an 18-year encounter history dataset comprising 146 marked individuals to estimate apparent survival between sexes and age classes (juvenile, adult). A difference in survival rates between sexes was strongly supported; 0.72 ± 0.04 for adult females and 0.82 ± 0.03 for adult males. This difference may be a reflection of either reproductive costs or additional risks of incubation and brooding, such as depredation. We also found support for age-biased survival, but limited information for juveniles did not provide a well-supported model fit for our data (juvenile survival = 0.17 ± 0.15; adults = 0.78 ± 0.02). However, apparent adult survival was similar to that of other Hawaiian passerines (mean 0.78 ± 0.03, n = 16). These results suggest that efforts to prevent the extinction of this species may benefit from future management strategies focused on increasing female survival such as predator reduction.
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Simon, John C., Thane K. Pratt, Kim E. Berlin y James R. Kowalsky. "Reproductive Ecology and Demography of the ‘ĀKohekohe". Condor 103, n.º 4 (1 de noviembre de 2001): 736–45. http://dx.doi.org/10.1093/condor/103.4.736.
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AbstractThe ‘Ākohekohe (Palmeria dolei) is an endangered Hawaiian honeycreeper endemic to the montane rain forests of east Maui in the Hawaiian Islands. We investigated ‘Ākohekohe nesting ecology using color-banded birds for the first time as a background to understanding the species' conservation. From 1994–1997, we color-banded 78 individuals, located and monitored 46 active nests, and took behavioral data during 534 hr of nest observation at Hanawī Natural Area Reserve, near the center of the species' range. ‘Ākohekohe nesting behavior and life history closely resembled that of ‘Apapane (Himatione sanguinea) and related honeycreepers. The birds were monogamous within and among years, and we found no evidence of polyandry, polygyny, or helpers at the nest. The nesting season extended from November to early June. Females performed all incubation and brooding. Males provisioned females and nestlings, and they were more active than females in feeding fledglings during the two-week period of parental dependency. Modal clutch size, as determined from egg counts at three nests and by counting begging chicks at other nests, was two eggs, and parents frequently fledged two chicks. We found an overall nest success rate of 68% by the Mayfield method, a high rate compared with other Hawaiian honeycreepers and continental passerines. An average of 1.1 chicks fledged per active nest, and at least 42% of nesting pairs made two or more nesting attempts per season. Rats (Rattus spp.) were abundant at the study site, and we confirmed their depredating some ‘Ākohekohe nests, so we did not expect to find such a high rate of nest success. The estimated annual probability of adult survival was also high, at 0.95 ± 0.10 (SE).Ecología Reproductiva y Demografía de Palmeria doleiResumen. Palmeria dolei es una especie de mielero amenazada endémica de las selvas nubladas de montaña del Este de Maui en las Islas de Hawai. Investigamos la ecología de nidificación de esta especie usando aves marcadas con anillos de colores como antecedente para entender la conservación de la especie. Entre 1994–1997 marcamos 78 individuos, localizamos y monitoreamos 46 nidos activos, y recolectamos datos de comportamiento durante 534 hr de observación de nidos en la Reserva Natural Hanawī, cercana al centro del rango de distribución de la especie. El comportamiento de nidificación y la historia de vida de P. dolei son marcadamente similares a los de Himatione sanguinea y otros mieleros relacionados. Las aves fueron monógamas dentro y entre años, y no hallamos evidencias de poliandría, poliginia, o ayudantes en los nidos. La estación de nidificación se extendió desde noviembre hasta principios de junio. Las hembras realizaron toda la incubación y cuidado de la nidada. Los machos aprovisionaron a las hembras y pichones, y fueron más activos que las hembras en alimentar a los volantones durante las dos semanas que dependen de los padres. La moda del tamaño de la nidada, determinada a partir del conteo de huevos en tres nidos y del recuento de gritos de llamada de pichones, fue de dos huevos, y los padres generalmente lograron criar dos pichones. Encontramos una tasa de éxito global de los nidos del 68% estimada con el método Mayfield, lo que representa una alta tasa comparada con la de otros mieleros hawaianos y paseriformes continentales. Un promedio de 1.1 pichones por nido activo llegaron a la etapa de dejar el nido, y al menos 42% de las parejas nidificantes realizaron dos o más intentos de nidificación por estación. Ratas (Rattus spp.) fueron abundantes en el sitio de estudio, y confirmamos que depredan nidos de P. dolei, por lo que no esperabamos obtener una tasa de éxito de nidificación tan alta. La probabilidad estimada de supervivencia de los adultos fue también alta, 0.95 ± 0.10 (ES).
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Liebherr, James K. "Blackburnia gastrellariformis sp. n. (Coleoptera: Carabidae), from Molokai: successful prediction of a new taxon by reconciled tree analysis". Insect Systematics & Evolution 32, n.º 2 (2001): 133–41. http://dx.doi.org/10.1163/187631201x00083.
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AbstractBlackburnia gastrellariformis sp. n., is described from East Molokai, Hawaii. Based on cladistic parsimony analysis of adult characters, the species is hypothesized to be most closely related to B. komohana Liebherr & Zimmerman of West Maui, with these two species comprising the adelphotaxon to the East Maui species pair, B. haleakala Liebherr & Zimmerman + B. putealis (Blackburn). Previous reconciled tree analysis for the Hawaiian Blackburnia radiation conducted before discovery of B. gastrellariformis found a general pattern in which Molokai and West Maui were hypothesized as sister-areas to the exclusion of the East Maui volcano, Haleakala, though the less common, incongruent area relationship of (Molokai (West Maui + East Maui) was also represented in the taxon-area cladogram. In the present reconciled tree analysis, the closest hypothesized relationship of B. gastrellariformis and a West Maui species corroborates the more common pattern by replacing items of error in the previous analysis with the newly discovered species. Elevational habitat shifts are invoked to explain the occurrence of numerous sister-species pairs in Molokai and West Maui, currently separated by the Pailolo Channel, relative to species occupying Haleakala.
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Trujillo, Eduardo E., Chris Kadooka, Victor Tanimoto, Steve Bergfeld, Glenn Shishido y Galen Kawakami. "Effective Biomass Reduction of the Invasive Weed Species Banana Poka by Septoria Leaf Spot". Plant Disease 85, n.º 4 (abril de 2001): 357–61. http://dx.doi.org/10.1094/pdis.2001.85.4.357.
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Inoculations of Septoria passiflorae for biological control of banana poka (Passiflora tripartita var. tripartita) at different forest sites in Hawaii, Kauai, and Maui resulted in successful establishment of the Septoria leaf spot disease at all sites during 1996. Semi-annual monitoring of sites in 1997 revealed low disease incidence and no disease spread to adjacent non-inoculated plants. Site inspections in March 1998 revealed light disease epidemics causing visible defoliation at inoculated sites on Kauai and Maui. Banana poka biomass reduction at sites with light epidemics of the disease in Kauai and Maui were estimated to be less than 10% in 1998, whereas in 1999 biomass reduction ranged from 50 to 95%. Five of 11 inoculation sites in 1996 on the island of Hawaii showed no disease. These five sites on Kaloko had frequent acid rainfall averaging 3.2 pH, which inhibited spore germination and infection. Six sites, free of acid rain, three at Hilo Forest Reserve and three at Puuwaawaa Wildlife Sanctuary, had severe disease epidemics by 1998, and vine defoliation was >90%. Widespread epidemics of the disease occurred in 1999, resulting in estimated 80 to 95% biomass reductions in more than 2,000 hectares of native forest infested with banana poka.
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MEDEIROS, MATTHEW J. "A new species of flightless, jumping, alpine moth of the genus Thyrocopa from Hawaii (Lepidoptera: Xyloryctidae: Xyloryctinae)". Zootaxa 1830, n.º 1 (28 de julio de 2008): 57. http://dx.doi.org/10.11646/zootaxa.1830.1.5.
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A new species of brachypterous, flightless, jumping alpine Thyrocopa moth, T. kikaelekea, is described from Hawaii Island. This new species is similar to T. apatela (Walsingham), another flightless species from Maui Island. Thyrocopa kikaelekea is hypothesized not to be the sister taxon to T. apatela, instead representing an independent loss of flight.
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Hormiga, G. "Orsonwelles, a new genus of giant linyphiid spiders (Araneae) from the Hawaiian Islands". Invertebrate Systematics 16, n.º 3 (2002): 369. http://dx.doi.org/10.1071/it01026.
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The Hawaiian spider genus Orsonwelles, gen. nov. (Araneae : Linyphiidae) is described. All Orsonwelles species are single island endemics: Kauai harbours six species; Oahu has three; Molokai has two; and Maui and Hawaii have one species each. The thirteen species included in Orsonwelles are described and illustrated: O. torosus (Simon), comb. nov., O. malus, sp. nov., O. calx, sp. nov., O. ventus, sp. nov., O. bellum, sp. nov. and O. iudicium, sp. nov. from Kauai; O. polites, sp. nov. (the type species), O. ambersonorum, sp. nov. and O. arcanus, sp. nov. from Oahu; O. othello, sp. nov. and O. macbeth, sp. nov. from Molokai; O. falstaffius, sp. nov. from Maui; and O. graphicus (Simon), comb. nov. from Hawaii. A total of 55 morphological characters (plus one behavioural character) were scored for twelve taxa (four Orsonwelles species plus eight linyphiid outgroups) to test the monophyly of the genus using cladistic methods. The most parsimonious cladograms provide robust character support for the monophyly of Orsonwelles. A single colonisation of the Hawaiian archipelago is hypothesised to explain the presence of these species in the Hawaiian Islands. This genus represents a case of insular gigantism (these are the largest linyphiids described), although the close relatives of Orsonwelles remain unknown. Their web architecture is also described and illustrated.
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Kohlmeyer, Jan y Brigitte Volkmann-Kohlmeyer. "Marine fungi from Aldabra, the Galapagos, and other tropical islands". Canadian Journal of Botany 65, n.º 3 (1 de marzo de 1987): 571–82. http://dx.doi.org/10.1139/b87-073.
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Saprobic higher marine fungi were collected in Aldabra (8 species, 1 variety), Galapagos (10 species), Hawaii (17 species), and Tobago (22 species). The material includes 26 ascomycetes, 1 basidiomycete, and 5 deuteromycetes. Lindra hawaiiensis (Maui) and Massarina thalassiae (Aldabra, Belize, Florida, Galapagos, India (Madras), Mexico (Baja California)) are new species. Distribution maps for the following species are presented: Cytospora rhizophorae, Didymosphaeria rhizophorae, Halosphaeria cucullata – Periconia prolifica, Lindra thalassiae, and Massarina thalassiae. Endemic marine fungi with saprobic modes of life have not been encountered.
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Lachance, Marc-André, Jane M. Bowles, Carmen Mueller y William T. Starmer. "On the biogeography of yeasts in the Wickerhamiella clade and description of Wickerhamiella lipophila sp. nov., the teleomorph of Candida lipophila". Canadian Journal of Microbiology 46, n.º 12 (1 de diciembre de 2000): 1145–48. http://dx.doi.org/10.1139/w00-108.
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We describe the new yeast species Wickerhamiella lipophila, the teleomorph of Candida lipophila, a haploid heterothallic yeast previously isolated from insects associated with morning glories in Hawaii. Both mating types were recovered in the eastern region of Maui, and a single strain was found in the Waimea region of Kauai. We reexamined the mating compatibility of the several strains of Candida lipophila previously collected on the island of Hawaii and found them to be fertile mating types that had been overlooked because of the unpredictability of mating and ascus formation. The type culture of Candida lipophila [UWO(PS)91-681.3 = CBS 8458, h+] is transferred to the genus Wickerhamiella, and strain UWO(PS)00-340.1 (CBS 8812, h-) is designated as isotype. Also found on Maui and Kauai were strains of Candida drosophilae that produced a strong extracellular protease. An update on the global distribution of members of the Wickerhamiella clade is given.Key words: yeasts, Wickerhamiella, Candida, flowers, insects, biogeography.
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Kohlmeyer, Jan y Brigitte Volkmann-Kohlmeyer. "A new marine Dryosphaera (Ascomycotina) from the tropics". Canadian Journal of Botany 71, n.º 7 (1 de julio de 1993): 992–95. http://dx.doi.org/10.1139/b93-113.
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The marine ascomycete Dryosphaera tropicalis Kohlm. & Volkm.-Kohlm., sp.nov., is described from the Caribbean (Tobago), the Indian Ocean (Sri Lanka, Thailand), and the Pacific Ocean (Hawaiian Islands: Hawaii, Kauai, Maui, and Molokai). The new species occurs on intertidal and supratidal wood on sandy beaches. It is compared with the type species, Dryosphaera navigans from temperate waters, and differs mainly by ascospore dimensions and appendages. Key words: arenicolous fungi, ascomycetes, Dryosphaera, marine fungi, tropics.
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Okihiro, M. S. "Chromatophoromas in Two Species of Hawaiian Butterflyfish, Chaetodon multicinctus and C. miliaris". Veterinary Pathology 25, n.º 6 (noviembre de 1988): 422–31. http://dx.doi.org/10.1177/030098588802500604.
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Chromatophoromas (cutaneous pigment cell tumors) were seen in two species of butterflyfish, Chaetodon multicinctus and Chaetodon miliaris, over an 11-year period (1976–1987) in waters off the islands of Maui, Lanai, and Molokini in the state of Hawaii. The chromatophore tumors found in the brown-barred butterflyfish, C multicinctus, were predominantly iridophoromas (characterized by the presence of birefringent olive-green crystalline pigment), while the tumors in the lemon butterflyfish, C. miliaris, were primarily melanophoromas (characterized by the presence of melanin pigment). Mixed chromatophoromas, composed of iridophores, melanophores, and undifferentiated chromatophores, were found in both species. The prevalence of chromatophoromas in C. multicinctus off the island of Maui varied from a low of 22–25% in 1976 to a high of 50% in 1987. The estimated prevalence of chromatophoromas in C. miliaris was 2.5% off the island of Molokini in 1976, and 5.0% off Lanai in 1987. The cause or causes of chromatophoromas in these two species of butterflyfish has not been determined.
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Hozawa, Mika y Eiji Nawata. "Assessment of the Genetic Diversity of Ulex europaeus in Maui, California, Hawaii and New Zealand by a Method of Microsatellite Markers". Biology and Life Sciences Forum 4, n.º 1 (30 de noviembre de 2020): 5. http://dx.doi.org/10.3390/iecps2020-08564.
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One of the most serious, invasive, allohexaploid plant species, Ulex europaeus, is originally from western Europe and is now spreading to the world by some unknown pathways. Plants often show phenotypic plasticity according to their environment, but elucidating the fact that the differences are derived from environmental or genetic effects is very important for further study. Thus, the aim of this study was to assess the genetic distances among Ulex europaeus from four different regions, namely Maui, California, Hawaii and New Zealand. The microsatellite method, which has been frequently used to test the genetic distances of the hexaploid plant species, was recently used for assessment because a normal single nucleotide polymorphism (SNP) often shows genotypic ambiguity on hexaploids. We tested the leaf samples of 37 mother trees from four regions (Maui: 11; California: 4; Hawaii: 7; New Zealand: 15) at five microsatellite loci. After polymerase chain reaction analyses (PCR), dinucleotide-repeat motifs (DRMs) were counted and compared to test the genetic distances of the samples. As a result, a dendrogram and analysis of molecular variance (AMOVA) showed that Ulex europaeus sampled in four different regions were genetically very close. If they show any morphological differences, they are inferred to be derived from environmental effects.
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Grigg, R. W. "Invasion of a deep black coral bed by an alien species, Carijoa riisei , off Maui, Hawaii". Coral Reefs 22, n.º 2 (1 de julio de 2003): 121–22. http://dx.doi.org/10.1007/s00338-003-0306-5.
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Palliser, Anna y Giles Dodson. "Avoiding post-truth environmental conflict in New Zealand: communicating uncertainties in endangered species science". Journal of Science Communication 18, n.º 04 (29 de julio de 2019): A05. http://dx.doi.org/10.22323/2.18040205.
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Keyes [2004, p. 15] says: “In the post-truth era we don't just have truth or lies but a third category of ambiguous statements that are not exactly the truth but fall short of a lie”. In this paper about Hector's and Maui dolphin management in New Zealand, we argue that some scientific knowledge about these species presented and disseminated in ways that equate to this third category and as such may be classed as ‘post-truth type communication’. This generates citizen mistrust in science, scientists and government agencies and inflames conflict among informed stakeholders. We argue trust may be rebuilt by a combination of deliberative approaches to environmental governance, transparency about uncertainties, information gaps and divergent scientific opinions, and reformulation of normal scientific approaches and assumptions to those advocated by post-normal science.
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SCHMITZ, PATRICK y DANIEL RUBINOFF. "Three new species of Hyposmocoma (Lepidoptera, Cosmopterigidae) from the Hawaiian Islands, based on morphological and molecular evidence". Zootaxa 1821, n.º 1 (11 de julio de 2008): 49. http://dx.doi.org/10.11646/zootaxa.1821.1.5.
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The Cosmopterigid genus Hyposmocoma (Lepidoptera, Cosmopterigidae) is endemic to Hawaii and contains over 350 recognized species, though only one new species has been described in the past 62 years. We describe and illustrate three new species of Hyposmocoma: Hyposmocoma kaupo sp. nov. from the island of Maui, H. kapakai sp. nov. from Oahu, and H. kaikuono sp. nov. from Molokai, all known from both sexes, and all apparently single-island endemics. The casemaking larvae of all three species feed on lichen and organic debris on dry rocks in open or partly forested habitat. While morphological differences among these three species are small, genetic divergence across parts of the mitochondrial gene cytochrome oxidase I and the nuclear genes elongation factor 1 indicate universally deep divergence, making these taxa a classic example of sibling species.
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Fretz, J. Scott. "Scales of Food Availability for an Endangered Insectivore, The Hawaii Akepa". Auk 119, n.º 1 (1 de enero de 2002): 166–74. http://dx.doi.org/10.1093/auk/119.1.166.
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Abstract The Hawaii Akepa (Loxops coccineus coccineus) is an endangered bird that has declined dramatically in the last 100 years, and is now rare or absent from many areas that appear to support suitable habitat. Food availability may play a role in these distribution patterns, but differences in food between sites may arise from different sources. I compared prey availability between a site supporting a large, stable Hawaii Akepa population, and a site from which Hawaii Akepa have declined in the last 100 years for unknown reasons. I used three spatial scales to compare food between sites to explore the basis of differences in food between sites. At a scale appropriate for comparing prey population dynamics (scale 1), I found that prey population densities are similar between sites, suggesting that introduced (or native) predators or parasitoids have not affected prey populations differently between sites. At two larger scales incorporating habitat structure, I found that food availability is much lower at the site of Hawaii Akepa declines. Differences in canopy density per square meter (scale 2), and in canopy cover per square kilometer (scale 3), result in lower food availability that may have effects on individual foraging birds as well as on potential Hawaii Akepa population density. These findings illustrate the importance of explicitly incorporating spatial scale into inquiries about food for Hawaii Akepa, and suggest that the site of population declines may not be suitable habitat with respect to food for this species.
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Callicott, J. Baird y William Grove-Fanning. "SHOULD ENDANGERED SPECIES HAVE STANDING? TOWARD LEGAL RIGHTS FOR LISTED SPECIES". Social Philosophy and Policy 26, n.º 2 (24 de junio de 2009): 317–52. http://dx.doi.org/10.1017/s0265052509090268.
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The Endangered Species Act of 1973 (ESA) is America's strongest environmental law. Its citizen-suit provision—permitting “any person” whomsoever to sue on behalf of a threatened or endangered species—awards implicit intrinsic value, de facto standing, and operational legal rights (sensu Christopher D. Stone) to listed species. Accordingly, some cases had gone forward in the federal courts in the name of various listed species between 1979 (Palila v. Hawaii Dept. of Land & Natural Resources) and 2004 (Cetacean Community v. Bush), when the Ninth Circuit Court of Appeals ruled that animals could not sue in their own name. Because the Supreme Court has interpreted its habitat destruction as the “taking” of a listed species, some have argued that enforcement of the ESA's critical-habitat-protection provision is a “regulatory taking” of private property without just compensation, contrary to the Fifth Amendment of the Constitution. The courts have not agreed. The ESA citizen-suit provision appears to waive federal-court standing requirements devolved from Article III of the U.S. Constitution, creating much confusion and mutually contradictory rulings. A series of cases (culminating with Bennett v. Spear) reconciles the ESA's citizen-suit provision with the particularized and concrete “injury-in-fact” standing requirements devolved from Article III.
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Jones, Ryan T., Alberto Bressan, April M. Greenwell y Noah Fierer. "Bacterial Communities of Two Parthenogenetic Aphid Species Cocolonizing Two Host Plants across the Hawaiian Islands". Applied and Environmental Microbiology 77, n.º 23 (30 de septiembre de 2011): 8345–49. http://dx.doi.org/10.1128/aem.05974-11.
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ABSTRACTAphids (Hemiptera: Aphididae) have been the focus of several studies with respect to their interactions with inherited symbionts, but bacterial communities of most aphid species are still poorly characterized. In this research, we used bar-coded pyrosequencing to characterize bacterial communities in aphids. Specifically, we examined the diversity of bacteria in two obligately parthenogenetic aphid species (the melon aphid,Aphis gossypii, and the cardamom aphid,Pentalonia caladii) cocolonizing two plant species (taro,Colocasia esculenta, and ginger,Alpinia purpurata) across four Hawaiian Islands (Hawaii, Kauai, Maui, and Oahu). Results from this study revealed that heritable symbionts dominated the bacterial communities for both aphid species. The bacterial communities differed significantly between the two species, andA. gossypiiharbored a more diverse bacterial community thanP. caladii. The bacterial communities also differed across aphid populations sampled from the different islands; however, communities did not differ between aphids collected from the two host plants.
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Boland, Raymond C., K. David Hyrenbach, Edward E. DeMartini, Frank A. Parrish y John J. Rooney. "Comparing mesophotic and shallow reef fish assemblages in the 'Au'au Channel, Hawaii: fish size, feeding guild composition, species richness, and endemism". Bulletin of Marine Science 96, n.º 4 (1 de octubre de 2020): 577–92. http://dx.doi.org/10.5343/bms.2019.0031.
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Mesophotic (30–150 m) reef fish assemblages in the 'Au'au Channel, between the Hawaiian Islands of Maui and Lanai, were compared visually with neighboring shallow (<30 m depth) reef fish assemblages for differences in structure. Between 2007 and 2011, approximately 7000 mesophotic and 4000 shallow reef fishes were identified, sized (standard length), and assigned to seven foraging guilds. The shallow water zone had more species than the mesophotic zone (99 vs 80, respectively). Mesophotic planktivores and two herbivore species were significantly larger than their shallow reef counterparts. Shallow reef fish assemblages had a higher Chao1 estimated species richness for herbivores and corallivores but not the other five foraging guilds. The differences between mesophotic and shallow fish assemblages indicate that both have unique communities of high conservation importance.
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MOCKFORD, EDWARD L. y PAUL D. KRUSHELNYCKY. "New species and records of Liposcelis Motschulsky (Psocoptera: Liposcelididae) from Hawaii with first description of the male of Liposcelis bostrychophila Badonnel". Zootaxa 1766, n.º 1 (9 de mayo de 2008): 53. http://dx.doi.org/10.11646/zootaxa.1766.1.3.
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Sampling of arthropods in ground and woody vegetation habitats in highland areas on the islands of Hawaii and Maui revealed six species of psocids of the genus Liposcelis. Three are new and are here described. L. maunakea sp. n. and L. volcanorum sp. n. are closely related and form a small species complex together with L. nasus Sommerman and L. deltachi Sommerman from southwestern United States and northern Mexico. A key to the species of this complex is included. The third new species, L. kipukae sp. n., is a member of group II-C with only 5 ommatidia in the eye. A key to the known species of group II-C with fewer than 7 ommatidia in the eye is included. First Hawaiian records are presented for L. bostrychophila Badonnel, L. deltachi, and L. rufa Broadhead. The first known males of L. bostrychophila are reported and described. This species is very widespread, but generally parthenogenetic.
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Burnett, Kimberly M., Brooks A. Kaiser y James A. Roumasset. "Invasive Species Control over Space and Time: Miconia calvescens on Oahu, Hawaii". Journal of Agricultural and Applied Economics 39, s1 (octubre de 2007): 125–32. http://dx.doi.org/10.1017/s1074070800028996.
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The optimal size and location of an invasive species population depend upon spatially differentiated biological growth, economic costs, and damages. Although largely absent from most economic models, spatial considerations matter because the likelihood and magnitude of the invasion vary spatially and the threatened assets may be unevenly distributed across space. We map the current and future populations of an invasive species, Miconia calvescens, on Oahu, Hawaii, and the potential damages to water quantity, quality, and endangered-species habitat, and weigh these against treatment costs. We find that optimal densities vary from approximately 1% to 18% cover throughout the island.
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Liebherr, James K. "NEW SPECIES OF MECYCLOTHORAX (COLEOPTERA: CARABIDAE, PSYDRINI) FROM POLIPOLI, MAUI DEFINE AN AREA OF ENDEMISM ON HALEAKALA VOLCANO, HAWAII". Journal of the New York Entomological Society 113, n.º 3 & 4 (octubre de 2005): 97–128. http://dx.doi.org/10.1664/0028-7199(2005)113[0097:nsomcc]2.0.co;2.
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CALDER, DALE R. "Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago". Zootaxa 2590, n.º 1 (31 de agosto de 2010): 1. http://dx.doi.org/10.11646/zootaxa.2590.1.1.
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A systematic account is given of 17 families, 25 genera, and 32 species of anthoathecate hydroids and limnopolyps reported from Hawaii. Applying Reversal of Precedence provisions in zoological nomenclature, the familiar hydrozoan genus names Hydractinia Van Beneden, 1844a, Bimeria Wright, 1859a, and Porpita Lamarck, 1801 are designated as valid and as nomena protecta, while seldom-used older names threatening them (the synonyms Echinochorium Hassall, 1841 and Manicella Allman, 1859a, and the homonym Porpita Soldani, 1789 respectively) are relegated to nomena oblita. Also designated a nomen oblitum is the name Pyxidium Leuckart, 1856, threatening its junior but widely used synonym Ectopleura L. Agassiz, 1862. The species name Bimeria vestita Wright, 1859a is rendered valid and a nomen protectum, while its virtually unused senior synonym Manicella fusca Allman, 1859 becomes a nomen oblitum. Hydrodendrium Nutting, 1905 is reinstated as a valid genus, distinct from Hydractinia and replacing its junior objective synonym Nuttingia Stechow, 1909. The spelling of Hydrodendridae Nutting, 1905 is emended to Hydrodendriidae, but that family name is retained as a synonym of Hydractiniidae. Usage of the familiar generic name Sphaerocoryne Pictet, 1893 is upheld by recognizing it and its former senior subjective synonym Corynetes Haeckel, 1879 as valid. The correct spelling of the family name originally founded as Olindiadae Haeckel, 1879 is taken to be Olindiidae, and spelling of the species name Solanderia misakinensis (Inaba, 1892), first established as Dendrocryne (sic) misakii, is stabilized. One new species, Stylactaria munita, is described from shallow waters at Hawaii Kai, Oahu. Lectotypes are designated for Corydendrium corrugatum Nutting, 1905 and Corydendrium minor Nutting, 1905 (=Turritopsis minor), both originally described from Hawaii. Type material of Balea mirabilis Nutting, 1905 (=Balella mirabilis), originally described from waters between the islands of Molokai and Maui, could not be located. Six anthoathecate species [Corydendrium parasiticum (Linnaeus, 1767), Bimeria vestita, Amphinema sp., Eudendrium carneum Clarke, 1882, Ectopleura viridis (Pictet, 1893), and Sphaerocoryne bedoti Pictet, 1893] are recorded from Hawaii for the first time.
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Uchida, J. Y. y L. L. Loope. "A Recurrent Epiphytotic of Guava Rust on Rose Apple, Syzygium jambos, in Hawaii". Plant Disease 93, n.º 4 (abril de 2009): 429. http://dx.doi.org/10.1094/pdis-93-4-0429b.
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A Neotropical rust of the Myrtaceae, Puccinia psidii Winter, was described from Psidium guajava L., or guava, in Brazil in 1884 (1). It was first discovered in Hawaii on potted Metrosideros polymorpha Gaud. on Oahu in April 2005 (2) with pathogenicity and identity established (3). It spread quickly, and by January 2006, severe outbreaks of this rust occurred statewide on new leaves of Syzygium jambos (L.) Alston, or rose apple. Rose apple, a native to South and Southeast Asia, was introduced to Hawaii in 1825 and is locally abundant to invasive from just above sea level to as high as 1,000 m in elevation in wet sites. Healthy, reddish green immature leaves on new twigs become deformed, yellow-red, and covered with masses of yellow urediniospores following infection. As the disease progresses, infected leaves are blackened and defoliate, with no functional leaves formed. Stem tips and branches are killed and the canopy becomes progressively smaller. Repeated mortality of juvenile leaves was observed to kill 8 to12 m tall trees in the Haiku area of Maui. Wind dispersal of urediniospores resulted in heavy infection of even small groups of S. jambos isolated by 1 km or more and billions of urediniospores covered the ground under diseased trees. On Hawaii, Maui, and Oahu, trees with many dead branches are becoming common with concerns about the fire hazard of these dead trees surrounded by dry grasses. At low humidity levels, or on more mature leaves characterized by soft expanded yellow-green tissue, fewer, mostly circular spots are formed that do not expand. S. jambos is an example of a highly vulnerable host in Hawaii and represents one of approximately 3,500 species of Myrtaceae outside the Neotropics growing in Australasia, Southeast Asia, the Pacific, and tropical Africa, which have evolved unexposed to P. psidii. Severely infected S. jambos plants have been the major source of spores in the environment, exposing many Myrtaceae hosts to P. psidii. The pathogenicity of P. psidii has been consistent among and within islands with S. jambos severely infected and M. polymorpha, Melaleuca quinquenervia, Rhodomyrtus tomentosa, Myrtus communis, and Eugenia species commonly infected. Other hosts such as S. cumini, S. malaccense, and Myriciaria cauliflora are also infected, although guava and Eucalyptus spp. are rarely infected. Strain differences within P. psidii are suspected (4). In the tropics, it is rare for mature trees to be killed by a foliar pathogen, but given the devastation of new growth, death of more S. jambos trees is likely. References: (1) T. A. Coutinho et al. Plant Dis. 82:819, 1998. (2) E. M. Killgore and R. A. Heu. New Pest Advisory No. 05-04. Hawaii Department of Agriculture, 2007. (3) J. Y. Uchida et al. Plant Dis. 90:524, 2006. (4) S. Zhong et al. Mol. Ecol. Res. 8:348. 2008.
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Cordell, Susan, Moana McClellan, Yvonne Yarber Carter y Lisa J. Hadway. "Towards restoration of Hawaiian tropical dry forests: the Kaupulehu outplanting programme". Pacific Conservation Biology 14, n.º 4 (2008): 279. http://dx.doi.org/10.1071/pc080279.
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Hawaiian tropical dry forests contain diverse assemblages of woody canopy species, including many endemic and endangered species that warrant conservation attention before completely disappearing. Today, tropical dry forests in Hawaii are not viable ecosystems. Poor land use practices, fragmentation, non-native plant invasions, and inadequate native vegetation regeneration are all factors that have contributed to their endangerment. Only an ambitious restoration programme that includes non-native ungulate exclusion, weed control, fire management, and the outplanting of seeds and seedlings will be sufficient to enhance Hawaiian tropical dry forests. We selected a 25 ha preserve within the Kaupulehu Dry Forest Preserve, located in North Kona on the Island of Hawaii, to test dry forest restoration strategies. In 1997, the preserve was fenced and all non-native ungulates were removed. Altogether, 4892 outplants were planted from 1999?2006. In 2007, we surveyed all of the outplants. The survey found 1487 live plants, 3357 dead, and 48 plants missing. This equates to an overall survival rate of 30%. Survival by vegetation type indicated that vines had the highest rate of survival (63%) followed by trees (34%). Herbs had the lowest rate of survival (12%). Twelve of a total of 35 species that were outplanted in the Kaupulehu Dry Forest Preserve accounted for more than 90% of the total surviving plants species, while five federally listed species represent almost 60% of the total. The outplanting of dry forest species into the Kaupulehu Dry Forest Preserve considerably increased the population of many federally listed endangered species. However, the high mortality of many common and important plant species of tropical dry systems highlights the importance of an outplanting programme that emphasizes ecosystem sustainability rather that species success. In equal measure, the successes and failures of the Kaupulehu outplanting project have enhanced our ability to begin to restore this unique and endangered ecosystem.
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Follett, Peter A. y George K. Roderick. "Genetic estimates of dispersal ability in the leucaena psyllid predator Curinus coeruleus (Coleoptera: Coccinellidae): implications for biological control". Bulletin of Entomological Research 86, n.º 4 (agosto de 1996): 355–61. http://dx.doi.org/10.1017/s0007485300034933.
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AbstractThe leucaena psyllid, Heteropsylla cubana Crawford, can devastate plantings of Leucaena leucocephala (Leguminosae), an economically important tree species in the Pacific Islands, Southeast Asia, Australia, India, Africa, and elsewhere. The predatory beetle, Curinus coeruleus Mulsant (Coleoptera: Coccinellidae), has been introduced into many of these areas from Hawaii for biological control of the psyllid. In this study, collections of C. coeruleus were made from 11 populations on four islands in the Hawaiian archipelago to determine population structure and estimate levels of gene flow. Over all populations, a measure of population subdivision, θ was 0.095, and the estimate of Nem, the average migration rate, was 2.4. θ values for the individual islands were 0.02, 0.12, 0.24 and 0.05 for Kauai, Hawaii, Maui, and Oahu, respectively. Estimated levels of gene flow between populations were not correlated with geographic distance, therefore isolation by distance does not appear to be an important process structuring C. coeruleus populations. Gene flow estimates can be used to characterize dispersal capabilities in insects or other organisms released for biological control. In this case, the inferior dispersal ability of C. coeruleus likely limits its rapid widespread establishment during release programmes.
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DEGMA, PETER, HARRY A. MEYER y JULIANA G. HINTON. "Claxtonia goni, a new species of Tardigrada (Heterotardigrada, Echiniscidae) from the island of Maui (Hawaiian Islands, U.S.A., North Pacific Ocean), with notes to the genus Claxtonia Gąsiorek & Michalczyk, 2019". Zootaxa 4933, n.º 4 (23 de febrero de 2021): 527–42. http://dx.doi.org/10.11646/zootaxa.4933.4.4.
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A new Tardigrada species, Claxtonia goni sp. nov. is described from specimens collected in the central area of the Haleakalā National Park, the island of Maui, Hawaii, U.S.A. The new species and Clx. pardalis (Degma & Schill, 2015) together with several examples of Clx. wendti (Richters, 1903) are the only known Claxtonia species with the plates having an intracuticular pattern resembling that on a leopard’s fur. Claxtonia goni sp. nov. differs from Clx. pardalis in the absence of pores on leg plates, in smaller and uniform pores on dorso-lateral plates, in very unequally spaced teeth in the dentate collar, in lesser ratio of internal cephalic cirrus and lateral cirrus A lengths, and in relatively shorter claws in fourth pair of legs. The differences between the new species and the other congeners as well as Echiniscus species with the same cirri composition and similar cuticular sculpture are also defined. The diagnosis of the genus Claxtonia is amended and three Echiniscus species are transferred into the genus with the proposed new combinations: Claxtonia aliquantilla (Grigarick, Schuster & Nelson, 1983) comb. nov., Clx. mosaica (Grigarick, Schuster & Nelson, 1983) comb. nov. and Clx. nigripustula (Horning, Schuster & Grigarick, 1978) comb. nov..
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Carothers, John H. "Behavioral and Ecological Correlates of Interference Competition among Some Hawaiian Drepanidinae". Auk 103, n.º 3 (1 de julio de 1986): 564–74. http://dx.doi.org/10.1093/auk/103.3.564.
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Abstract Interference interactions were studied on the island of Maui among four species of drepanidines that fed on canopy flowers of the ohia tree (Metrosideros collina). The birds had a size-related dominance hierarchy, with ranking (most to least dominant, by location in dominance matrix) as follows: Crested Honeycreeper (Palmeria dolei), Iiwi (Vestiaria coccinea), Apapane (Himatione sanguinea), and Common Amakihi (Hemignathus virens). Immatures were subordinate to conspecific adults. Crested Honeycreepers and Iiwis defended tree-canopy territories, Apapanes were nomadic flock foragers, and Common Amakihis were secretive foragers. Dominance by Iiwis was indicated by a lack of reversals in the dominance matrix. For the top-ranked Crested Honeycreeper dominance was also reflected in greater chase or greater resulting retreat distances or both. Age-related differences in interference behavior by dominants appeared to be due to inexperience, as indicated by shorter chase distances for immatures. Among subordinates both experience and plumage could be responsible for age differences in behavior. Immatures were chased equal distances (despite closer spacing) but less often than adults, and they chose safer retreat sites. Apapanes fed in flocks in a dominant's tree. This increased a dominant's territorial costs, reduced chase frequencies, increased Apapane foraging times, and let Apapanes forage in trees from which they otherwise were excluded. Comparisons with the assemblage on the island of Hawaii suggested similar structure among the three species the two islands have in common. On Maui the bottom-ranked Common Amakihi may be more affected by interference competition, perhaps undergoing a niche shift toward greater insectivory because of an additional dominant.
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Christensen, Carl C., Kenneth A. Hayes y Norine W. Yeung. "Taxonomy, Conservation, and the Future of Native Aquatic Snails in the Hawaiian Islands". Diversity 13, n.º 5 (18 de mayo de 2021): 215. http://dx.doi.org/10.3390/d13050215.
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Freshwater systems are among the most threatened habitats in the world and the biodiversity inhabiting them is disappearing quickly. The Hawaiian Archipelago has a small but highly endemic and threatened group of freshwater snails, with eight species in three families (Neritidae, Lymnaeidae, and Cochliopidae). Anthropogenically mediated habitat modifications (i.e., changes in land and water use) and invasive species (e.g., Euglandina spp., non-native sciomyzids) are among the biggest threats to freshwater snails in Hawaii. Currently, only three species are protected either federally (U.S. Endangered Species Act; Erinna newcombi) or by Hawaii State legislation (Neritona granosa, and Neripteron vespertinum). Here, we review the taxonomic and conservation status of Hawaii’s freshwater snails and describe historical and contemporary impacts to their habitats. We conclude by recommending some basic actions that are needed immediately to conserve these species. Without a full understanding of these species’ identities, distributions, habitat requirements, and threats, many will not survive the next decade, and we will have irretrievably lost more of the unique books from the evolutionary library of life on Earth.
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Pejchar, Liba y Jack Jeffrey. "Sap-Feeding Behavior and Tree Selection in the Endangered Akiapolaau (Hemignathus Munroi) in Hawaii". Auk 121, n.º 2 (1 de abril de 2004): 548–56. http://dx.doi.org/10.1093/auk/121.2.548.
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Abstract The Akiapolaau (Hemignathus munroi), an endangered Hawaiian honeycreeper, drills 3–5 mm deep holes in particular ohia trees (Metrosideros polymorpha) and drinks the sap that emerges, a remarkable example of convergent evolution in sap-feeding behavior with mainland woodpeckers and Australian sugar-gliders. There has been little research on how this species selects sap trees (“Aki trees”) and what advantages they confer. We marked the locations of and collected sap samples and microhabitat data from 101 Aki trees and 73 randomly selected control trees in Hakalau Forest National Wildlife Refuge, Hawaii. Aki trees were rare (2 ha−1), spatially clustered, and defended by Akiapolaau. Sap flow volume and speed were substantially greater in Aki trees than in controls. Aki trees also were larger, had thinner bark, and were more likely to be located on convex east-facing slopes where more light is available. Those results support the hypothesis that Aki trees are selected on the basis of high sap flow and a suite of unique microhabitat and tree characteristics. Sap may be an important energy source in times of low insect availability and a potent alternative to nectar for the Akiapolaau. Aki trees are both a fascinating example of niche specialization and a factor that should be considered when conserving or restoring habitat for this endangered species.
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Rubinoff, Daniel. "Phylogeography and ecology of an endemic radiation of Hawaiian aquatic case-bearing moths ( Hyposmocoma : Cosmopterigidae)". Philosophical Transactions of the Royal Society B: Biological Sciences 363, n.º 1508 (2 de septiembre de 2008): 3459–65. http://dx.doi.org/10.1098/rstb.2008.0115.
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The endemic moth genus Hyposmocoma (Lepidoptera: Cosmopterigidae) may be one of the most speciose and ecologically diverse genera in Hawaii. Among this diversity is the Hyposmocoma saccophora clade with previously unrecorded aquatic larvae. I present a molecular phylogeny based on 773 base pairs (bp) of the mitochondrial gene cytochrome c oxidase subunit I and 762 bp of the nuclear gene elongation factor 1-α. Topologies were constructed from data using maximum-parsimony, maximum-likelihood and Bayesian search criteria. Results strongly support the monophyly of the H. saccophora clade and the monophyly of the genus Hyposmocoma . The H. saccophora clade has single-island endemic species on Oahu, Molokai and West Maui. By contrast, there are three species endemic to Kauai, two being sympatric. The H. saccophora clade appears to follow the progression rule, with more basal species on older islands, including the most basal species on 11 Myr-old Necker Island, one of the Northwestern Hawaiian Islands. Aquatic behaviour either evolved recently in the species on the main Hawaiian Islands or was secondarily lost on the arid northwestern Necker Island. The phylogeny suggests that Hyposmocoma is older than any of the current main islands, which may, in part, explain Hyposmocoma 's remarkable diversity.
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G. Fancy, Steven, Thomas J. Snetsinger y James D. Jacob. "Translocation of the Palila, an endangered Hawaiian honeycreeper". Pacific Conservation Biology 3, n.º 1 (1997): 39. http://dx.doi.org/10.1071/pc970039.
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The Palila Loxioides bailleui is an endangered Hawaiian honeycreeper that is restricted to high-elevation dry woodlands on Mauna Kea volcano, Hawaii. Palila are absent or occur in small numbers throughout most of their historic range because of habitat loss, predation and avian disease. The Palila's habitat is regenerating as a result of feral ungulate control, but the species is likely to be slow in recolonizing former ranges because of strong site tenacity. In March 1993, we translocated 35 Palila to Kanakaleonui on the eastern slope of Mauna Kea to determine whether we could speed recovery by releasing adult birds in new areas where predators were controlled. At least two pairs of translocated Palila successfully nested at the release site during their first breeding season, and two other pairs constructed nests. The density of Palila at Kanakaleonui in the three years following the translocation was higher than that before translocation. Approximately half of the translocated birds remained at the release site for 2?6 weeks and then homed back to their capture site, >20 km away. Translocations of adult birds and release of captive-reared juvenile Palila, in combination with additional habitat restoration, may be an effective management tool for speeding the recovery of this species.
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Atkinson, Carter T., Julie K. Lease, Beth M. Drake y Nicholas P. Shema. "Pathogenicity, Serological Responses, and Diagnosis of Experimental and Natural Malarial Infections in Native Hawaiian Thrushes". Condor 103, n.º 2 (1 de mayo de 2001): 209–18. http://dx.doi.org/10.1093/condor/103.2.209.
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Abstract Omao (Myadestes obscurus) from the Hawaiian Islands typically have very low prevalences of infection with avian malaria (Plasmodium relictum) and it is not clear whether they share the same high susceptibility to this parasite that has been documented in native Hawaiian honeycreepers. We exposed four captive Omao to single infective mosquito bites and measured parasitemia, serological responses, and mortality over time. All four birds experienced transient infections with low parasitemias and were immune when rechallenged with multiple infective mosquito bites. By contrast, three of four honeycreepers (Maui Alauahio, Paroreomyza montana) that were exposed to the same dose and parasite isolate succumbed to infection. All four Omao developed antibodies to a common suite of malarial antigens that were detectable on immunoblots of a crude red blood cell extract of P. relictum. We used this technique to screen plasma samples from wild Omao and endangered Puaiohi (Myadestes palmeri) that were captured at elevations between 900 and 1300 m on the islands of Hawaii and Kauai. We found that the true prevalence of infection at elevations where active malaria transmission occurs is much higher than estimates based on blood smears alone. Hawaiian thrushes appear to have a high tolerance for malaria, with most individuals developing chronic, low-level infections after exposure that cannot be diagnosed accurately by blood smears.
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Atkinson, C. T., K. L. Woods, R. J. Dusek, L. S. Sileo y W. M. Iko. "Wildlife disease and conservation in Hawaii: Pathogenicity of avian malaria (Plasmodium relictum) in experimentally infected Iiwi (Vestiaria coccinea)". Parasitology 111, S1 (enero de 1995): S59—S69. http://dx.doi.org/10.1017/s003118200007582x.
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SUMMARYNative Hawaiian forest birds are facing a major extinction crisis with more than 75% of species recorded in historical times either extinct or endangered. Reasons for this catastrophe include habitat destruction, competition with non-native species, and introduction of predators and avian diseases. We tested susceptibility of Iiwi (Vestiaria coccinea), a declining native species, and Nutmeg Mannikins (Lonchura punctulata), a common non-native species, to an isolate ofPlasmodium relictumfrom the island of Hawaii. Food consumption, weight, and parasitaemia were monitored in juvenile Iiwi that were infected by either single (low-dose) or multiple (high-dose) mosquito bites. Mortality in both groups was significantly higher than in uninfected controls, reaching 100% of high-dose birds and 90% of low-dose birds. Significant declines in food consumption and a corresponding loss of body weight occurred in malaria-infected birds. Both sex and body weight had significant effects on survival time, with males more susceptible than females and birds with low initial weights more susceptible than those with higher initial weights. Gross and microscopic lesions in malaria fatalities included massive enlargement of the spleen and liver, hyperplasia of the reticuloendothelial system with extensive deposition of malarial pigment, and overwhelming anaemia in which over 30% of the circulating erythrocytes were parasitized. Nutmeg Mannikins, by contrast, were completely refractory to infection. Our findings support previous studies documenting high susceptibility of native Hawaiian forest birds to avian malaria. This disease continues to threaten remaining high elevation populations of endangered native birds.
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Baskin, Carol C., Jerry M. Baskin y Alvin Yoshinaga. "Imbibition and Germination of Seeds of Colubrina oppositifolia (Rhamnaceae), a Federal-Endangered Tree Species Endemic to Hawaii". Natural Areas Journal 27, n.º 1 (enero de 2007): 25–30. http://dx.doi.org/10.3375/0885-8608(2007)27[25:iagoso]2.0.co;2.
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Rovzar, Corey, Thomas W. Gillespie, Kapua Kawelo, Maggie McCain, Erin C. Riordan y Stephanie Pau. "Modelling the potential distribution of endangered, endemic Hibiscus brackenridgei on Oahu to assess the impacts of climate change and prioritize conservation efforts." Pacific Conservation Biology 19, n.º 2 (2013): 156. http://dx.doi.org/10.1071/pc130156.
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In the Hawaiian dry forest, 45% of all tropical dry forest trees and shrubs are on the federal threatened and endangered species list. Research is needed to understand the current range of these endangered species, the factors that affect their current and future distributions, and ultimately, identify areas where the most successful restoration can be undertaken. This research uses species distribution modelling to predict the potential range of Hibiscus brackenridgei, the state flower of Hawaii and a federally endangered species found on Oahu. We used presence data and the modelling algorithm Maxent to model the current potential distribution of H. brackenridgei, identify climate and environmental variables that influence the species’ distribution, and model the species’ predicted future distribution based on a range of projected climate change scenarios. Statistical analysis suggests that the Maxent models accurately predict the species’ distribution, and therefore, may be useful for conservation management. Comparing the current model with the future models of changes for 2060-2089, changes in the potential niche of H. brackenridgei only range by -4% to 14%. This suggests that the predicted changes in climate, under both low (B2a) and high (A2a) SRES (Special Report on Emissions Scenarios) global emissions scenarios, may not significantly impact the future distribution of H. brackenridgei on Oahu. We identified a total of 115 km2 of very highly (≥ 0.70) and highly (≥ 0.50) suitable habitat which represents potential areas where restoration projects could be implemented. This research suggests that threats like habitat loss, fire, invasive species, and grazing may be more important than climate for the future conservation of Hawaiian dry forest species.
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Kuehler, C., P. Harrity, A. Lieberman y M. Kuhn. "Reintroduction of hand-reared alala Corvus hawaiiensis in Hawaii". Oryx 29, n.º 4 (octubre de 1995): 261–66. http://dx.doi.org/10.1017/s0030605300021256.
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The wild alala Corvus hawaiiensis population has been declining for many years and only three pairs of birds are currently reproductively active on the island of Hawaii. At the recommendation of a committee formed by the National Academy of Sciences, a restoration programme was initiated in 1993 by The Peregrine Fund in collaboration with private land-owners, the US Fish and Wildlife Service, National Biological Service and the State of Hawaii. The restoration programme includes removing eggs from wild nesting birds for artificial incubation, handrearing and reintroduction. In two breeding seasons (1993, 1994), 17 eggs were removed from alala nests in the wild. Three eggs were infertile, 13 chicks hatched and 12 alala were successfully reared (hatchability: 93 per cent; survivability: 92 per cent). Four of these chicks were sent to the State of Hawaii's Olinda Endangered Species Propagation Facility, while four chicks from this facility were sent to the reintroduction programme. Twelve alala have been released by The Peregrine Fund: five in 1993 and seven in 1994. Three of the five birds released in 1993 and all seven of the birds released in 1994 are currently surviving in the wild.
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Willbrand, Brittany y Douglas Pfeiffer. "Brown Rice Vinegar as an Olfactory Field Attractant for Drosophila suzukii (Matsumura) and Zaprionus indianus Gupta (Diptera: Drosophilidae) in Cherimoya in Maui, Hawaii, with Implications for Attractant Specificity between Species and Estimation of Relative Abundance". Insects 10, n.º 3 (20 de marzo de 2019): 80. http://dx.doi.org/10.3390/insects10030080.
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Drosophila suzukii (Matsumura) is an agricultural pest that has been observed co-infesting soft-skinned fruits with Zaprionus indianus Gupta. The characterization of olfactory preferences by species is a necessary step towards the development of species-specific attractants. Five olfactory attractants were used to survey the populations of two invasive drosophilids in cherimoya in Maui, Hawaii. The attractants used were apple cider vinegar (ACV), brown rice vinegar (BRV), red wine (RW), apple cider vinegar and red wine (ACV+RW; 60/40), and brown rice vinegar and red wine (BRV+RW; 60/40). For D. suzukii, BRV+RW resulted in more captures than BRV, ACV, and RW, while ACV+RW resulted in more captures than ACV. No differences were observed between BRV+RW and ACV+RW. BRV had greater specificity in attracting D. suzukii compared to ACV, ACV+RW, and RW. For Z. indianus, no significant differences were observed in either the mean captures or specificity for any attractant used. Collectively, these findings demonstrate that (1) BRV and BRV+RW are effective field attractants and (2) D. suzukii has unique olfactory preferences compared to non-target drosophilids, while (3) Z. indianus’ preferences do not appear to vary from non-target drosophilids, and (4) the accuracy of relative abundance is impacted by the specificity of the attractants.
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Wilson, Duncan. "Making the Nēnē Matter: Valuing Life in Postwar Conservation". Environmental History 25, n.º 3 (9 de junio de 2020): 492–514. http://dx.doi.org/10.1093/envhis/emaa002.
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Abstract In 1950, a group of scientists and public figures, based in Hawaii and England, launched a transnational “restoration project” to save the nēnē or Hawaiian goose from extinction. Scrutinizing this project highlights how endangered species were valued as part of a historically contingent process that reflected and linked the interests of different groups. People did not undertake the restoration project simply because they realized the nēnē were endangered, but, instead, they sought to rescue it at the “eleventh hour” in order to legitimize the new conservation organizations that they helped establish after the Second World War. They also engaged with broader political and socioeconomic concerns to justify the restoration project, publicly framing the nēnē as a valuable asset that benefited Hawaii’s tourist economy and push for statehood. Disputes over the reintroduction of geese bred in England highlight how the nēnē were valued in complex and sometimes contradictory ways, with unforeseen consequences for both the restoration project and its animal subjects. This case study ultimately draws our attention to the inherently biopolitical nature of modern conservation, by showing that there is no simple trajectory from endangered life to valued life.
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Kim, M. S., J. W. Hanna y N. B. Klopfenstein. "First Report of an Armillaria Root Disease Pathogen, Armillaria gallica, Associated with Several New Hosts in Hawaii". Plant Disease 94, n.º 12 (diciembre de 2010): 1503. http://dx.doi.org/10.1094/pdis-07-10-0534.
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The loss and decline of native tree species caused by invasive plant pathogens is a major threat to the endangered endemic forests of the Hawaiian Islands (3). Thus, it is critical to characterize existing pathogens to evaluate potential invasiveness. In August 2005, rhizomorphs and mycelial bark fans of genet HI-4 were collected from dead/declining, mature trees of introduced Monterey pine (Pinus radiata) on the southern flank of Mauna Kea, Hawaii (approximately 19°42′55″N, 155°26′48″W, elevation 2,175 m). In March of 2008, three additional genets (HI-11, HI-13, and HI-16) were collected as rhizomorphs at a site named Pu'u La'au (west slope of the Mauna Kea Forest Reserve area, approximately 19°50′00″N, 155°35′35″W, elevation 2,275 to 2,550 m), approximately 20 km west-northwest of the HI-4 collection. These genets were collected from apparently healthy loblolly pine (Pinus taeda) that were introduced, apparently healthy māmane (Sophora chrysophylla; an endemic tree species of Hawaii), dead and dying māmane, and apparently healthy Methley plum (Prunus cerasifera × Prunus salicina) that was planted. All isolates were determined to have identical sequences in the intergenic spacer-1 rDNA region (GenBank Accession No. DQ995357). On the basis of somatic paring tests against North American Armillaria tester strains and 99% nucleotide sequence identities to GenBank Accession Nos. AY190245 and AY190246, these isolates were identified as Armillaria gallica. Past surveys have noted A. mellea sensu lato and A. nabsnona on numerous hosts in Hawaii, including māmane (3,4). However, to our knowledge, this is the first confirmed report of A. gallica in Hawaii, where it was found on māmane, Monterey pine, loblolly pine, and Methley plum. A. gallica has been widely categorized as a beneficial saprophyte, an opportunistic pathogen, or an aggressive pathogen (2). A recent study suggests that A. gallica can be highly pathogenic in some areas of the eastern United States and it is an important component of forest decline (2), especially under increasing stressors such as climate change. The isolation of A. gallica from declining stands on both introduced and endemic hosts under drought conditions suggests this pathogen is a contributing factor to forest decline on the island of Hawaii. Because the māmane tree is an important component of the native forest stands and essential to the endangered palila bird (Loxioides bailleui), which feeds almost exclusively on its green seeds (1), continued monitoring of Armillaria root disease is warranted. References: (1) P. C. Banko et al. J. Chem. Ecol. 28:1393, 2002. (2) N. J. Brazee and R. L. Wick. For. Ecol. Manage. 258:1605, 2009. (3) R. E. Burgan and R. E. Nelson. USDA For. Serv. Tech. Rep. PSW-3, 1972. (4) J. W. Hanna et al. Plant Dis. 91:634, 2007.
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Leary, James J. K., Jeremy Gooding, John Chapman, Adam Radford, Brooke Mahnken y Linda J. Cox. "Calibration of an Herbicide Ballistic Technology (HBT) Helicopter Platform Targeting Miconia calvescens in Hawaii". Invasive Plant Science and Management 6, n.º 2 (junio de 2013): 292–303. http://dx.doi.org/10.1614/ipsm-d-12-00026.1.
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AbstractMiconia (Miconia calvescens DC.) is a tropical tree species from South and Central America that is a highly invasive colonizer of Hawaii's forested watersheds. Elimination of satellite populations is critical to an effective containment strategy, but extreme topography limits accessibility to remote populations by helicopter operations only. Herbicide Ballistic Technology (HBT) is a novel weed control tool designed to pneumatically deliver encapsulated herbicide projectiles. It is capable of accurately treating miconia satellites within a 30 m range in either horizontal or vertical trajectories. Efficacy was examined for the encapsulated herbicide projectiles, each containing 199.4 mg ae triclopyr, when applied to miconia in 5-unit increments. Experimental calibrations of the HBT platform were recorded on a Hughes 500-D helicopter while conducting surveillance operations from November 2010 through October 2011 on the islands of Maui and Kauai. Search efficiency (min ha−1; n = 13, R2 = 0.933, P< 0.001) and target acquisition rate (plants hr−1, n = 13, R2 = 0.926, P< 0.001) displayed positive linear and logarithmic relationships, respectively, to plant target density. The search efficiency equation estimated target acquisition time at 25.1 sec and a minimum surveillance rate of 67.8 s ha−1 when no targets were detected. The maximum target acquisition rate for the HBT platform was estimated at 143 targets hr−1. An average mortality factor of 0.542 was derived from the product of detection efficacy (0.560) and operational treatment efficacy (0.972) in overlapping buffer areas generated from repeated flight segments (n = 5). This population reduction value was used in simulation models to estimate the expected costs for one- and multi-year satellite population control strategies for qualifying options in cost optimization and risk aversion. This is a first report on the performance of an HBT helicopter platform demonstrating the capability for immediate, rapid-response control of new satellite plant detections, while conducting aerial surveillance of incipient miconia populations.
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Wang, Awaya, Zhu, Motooka, Nelson y Li. "Tests of Hexazinone and Tebuthiuron for Control of Exotic Plants in Kauai, Hawaii". Forests 10, n.º 7 (10 de julio de 2019): 576. http://dx.doi.org/10.3390/f10070576.
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Non-native plant species have become serious pests in Hawaii’s delicate island ecosystems. It is necessary to control invasive plants. The herbicides hexazinone and tebuthiuron were evaluated for defoliation efficacy to control several major invasive plants and for non-target effects on native plants at Site I in a rainforest at 1200 m elevation and Site II in a mesic area at 640 m elevation on the island of Kauai, Hawaii. The invasive weed species in the sites included daisy fleabane (Erigeron karvinskianus DC.), faya tree (Myrica faya Ait.), strawberry guava (Psidium cattleyanum Sabine), banana passion fruit (Passiflora mollissima Bailey), vaseygrass (Paspalum urvillei Steud.), and highbush blackberry (Rubus argutus Link. 1822). Native plants included ohia lehua (Metrosideros polymorpha Gaudich.), naupaka (Scaevola cerasifolia Labill.), pilo (Hedyotis mannii), hona (Urera glabra (Hook. & Arn.)), aalii (Dodonaea viscosa Jacq.), and amau (Sadleria sp.). The results showed that broadcast applications of hexazinone granules and tebuthiuron pellets were effective on some of those invasive species. Herbicidal tolerance varied among the native species. For example, D. viscosa showed high tolerance to hexazinone. S. cerasifolia was susceptible to hexazinone, but not to tebuthiuron. The inconsistent defoliation of Sadleria sp. occurred among different applications rates of the two herbicides. M. polymorpha, particularly when it was small, could tolerate hexazinone and tebuthiuron. U. glabra was severely injured by the two herbicides. H. mannii was moderately tolerant to hexazinone, but fairly sensitive to tebuthiuron. The invasive loblolly pine (Pinus taeda L.) was highly tolerant to hexazinone, but was very sensitive to tebuthiuron. M. faya was very sensitive to hexazinone, but very tolerant to tebuthiuron. P. cattleyanum was sensitive to both herbicides. Six and nine months after hexazinone and tebuthiuron treatment, respectively, native plants were transplanted into the Sites to observe injury from residual herbicides. Approximately less than 10% mortality was observed for the out-planted native species three months after planting (MAP), indicating that the native species showed less injury in the early period of transplant. The mortality of the three endangered species Kauai hau kuahiwi (Hibiscadelphis distans), Kauai delissea (Delissea rhytidosperma H.Mann) and kawawaenohu (Alsinidendron lynchnoides), however, increased as the MAP increased. Overall, broadcast treatments of hexazinone and tebuthiuron at rates higher than 1 kg active ingredient per hectare would be problematic. The dissipation half-life values of hexazinone and tebuthiuron in the 1-15 cm layer of soils at the two sites were approximately 7 days and greater than 180 days, respectively.
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Plentovich, Sheldon, Jason R. Graham, William P. Haines y Cynthia B. A. King. "Invasive ants reduce nesting success of an endangered Hawaiian yellow-faced bee, Hylaeus anthracinus". NeoBiota 64 (28 de enero de 2021): 137–54. http://dx.doi.org/10.3897/neobiota.64.58670.
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Hawaii has a single group of native bees belonging to the genus Hylaeus (Hymenoptera: Colletidae) and known collectively as Hawaiian yellow-faced bees. The majority of the 63 species have experienced significant declines in range and population. In 2016, seven species received federal protection under the Endangered Species Act of 1973. Competitors and predators, such as invasive bees, wasps and ants, are thought to be important drivers of range reductions and population declines, especially at lower elevations where more non-native species occur. We evaluated the effects of invasive ants on nesting Hylaeus anthracinus using artificial nest blocks that allowed us to track nest construction and development. The blocks were placed in pairs at 22 points encompassing three sites on the north and east sides of Oahu. One block in each pair was treated with a sticky barrier to prevent access by ants, while the other block remained untreated. From December 2015 to December 2016, we monitored 961 individual nests in the blocks. Seventy percent of nests in control blocks were invaded by ants. Nests in treated blocks were more likely to produce at least one adult than nests in untreated blocks (38% vs. 14%, respectively). In untreated blocks, ants were the most common cause of nest mortality followed by lack of development, displacement (primarily by the competitor Pachodynerus nasidens) and presumed pathogens. The invasive ant, Ochetellus glaber was the only observed nest predator, although the big-headed ant, Pheidole megacephala was also present. Hylaeus anthracinus inhabits coastal strand habitat which occurs in a narrow band just above the high tide line. Nests at one site were destroyed due to a high wave event, highlighting this species’ vulnerability to sea level rise. Additionally, no adult bees or nests were observed at the points where yellow crazy ants, Anoplolepis gracilipes were established. An increased understanding of the factors limiting Hawaii’s yellow-faced bees will provide information for future conservation efforts that may include landscape-scale ant control, habitat restoration and translocations.
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Shell, Wyatt A. y Sandra M. Rehan. "Invasive range expansion of the small carpenter bee, Ceratina dentipes (Hymenoptera: Apidae) into Hawaii with implications for native endangered species displacement". Biological Invasions 21, n.º 4 (1 de diciembre de 2018): 1155–66. http://dx.doi.org/10.1007/s10530-018-1892-z.
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Hart, Patrick J. y Leonard A. Freed. "Structure and Dynamics of Mixed-Species Flocks in a Hawaiian Rain Forest". Auk 120, n.º 1 (1 de enero de 2003): 82–95. http://dx.doi.org/10.1093/auk/120.1.82.
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Abstract Mixed-species flocks of native and introduced birds were studied for four years in an upper elevation Hawaiian rain forest. Those flocks were characterized by strong seasonality, large size, low species richness, high intraspecific abundance, a lack of migrants, and a general lack of territoriality or any sort of dominance hierarchy. There was high variability among years in patterns of occurrence at the species level, and high variability within years at the individual level. These flocks are loosely structured social groupings with apparently open membership. The fluid, unstable movement patterns, high degree of variability in size and composition, and lack of positive interspecific associations are not consistent with the “foraging enhancement” hypothesis for flocking. Two resident, endangered insectivores, the Akepa (Loxops coccineus) and Hawaii Creeper (Oreomystis mana) served as “nuclear” species. Flock composition was compared between two study sites that differed significantly in density of these two nuclear species. Flock size was similar at the two sites, primarily because the nuclear species were over-represented relative to their density. This observation suggests that birds are attempting to achieve a more optimal flock size at the lower density site.