Journal articles: 'Rota Island'

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Cortes-Rodriguez, Nandadevi, Michael Campana, Lainie Berry, Sarah Faegre, Scott Derrickson, Renee Ha, Rebecca Dikow, Christian Rutz, and Robert Fleischer. "Population Genomics and Structure of the Critically Endangered Mariana Crow (Corvus kubaryi)." Genes 10, no. 3 (March 1, 2019): 187. http://dx.doi.org/10.3390/genes10030187.

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The Mariana Crow, or Åga (Corvus kubaryi), is a critically endangered species (IUCN -International Union for Conservation of Nature), endemic to the islands of Guam and Rota in the Mariana Archipelago. It is locally extinct on Guam, and numbers have declined dramatically on Rota to a historical low of less than 55 breeding pairs throughout the island in 2013. Because of its extirpation on Guam and population decline on Rota, it is of critical importance to assess the genetic variation among individuals to assist ongoing recovery efforts. We conducted a population genomics analysis comparing the Guam and Rota populations and studied the genetic structure of the Rota population. We used blood samples from five birds from Guam and 78 birds from Rota. We identified 145,552 candidate single nucleotide variants (SNVs) from a genome sequence of an individual from Rota and selected a subset of these to develop an oligonucleotide in-solution capture assay. The Guam and Rota populations were genetically differentiated from each other. Crow populations sampled broadly across their range on Rota showed significant genetic structuring – a surprising result given the small size of this island and the good flight capabilities of the species. Knowledge of its genetic structure will help improve management strategies to help with its recovery.

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KRONER, ANDRIA, and RENEE ROBINETTE HA. "An update of the breeding population status of the critically endangered Mariana Crow Corvus kubaryi on Rota, Northern Mariana Islands 2013–2014." Bird Conservation International 28, no. 3 (March 2, 2017): 416–22. http://dx.doi.org/10.1017/s0959270917000053.

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SummaryThe critically endangered Mariana Crow now exists in a single population on the island of Rota, Northern Mariana Islands. Targeted management requires an accurate measure of the population status of this species. In Mariana Crows the breeding population is both the easiest cohort to accurately survey and the most important segment of the population in terms of population recovery. The total number of Mariana Crow territorial pairs was estimated on the island of Rota using a direct count method, and total population size was calculated using a Chapman estimate. From September 2013 to April 2014, 46 crow pairs were found and up to an additional eight pairs were estimated in unsearched areas. The total population was estimated to be 178 individuals. This represents a 10–23% decline in pairs in the six years since 2007 and a 46–53% decline since 1998. This number is also considerably lower than the minimum 75 pairs recommended to maintain a viable population on Rota.

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Sischo, David R., and Michael G. Hadfield. "The tree snail on Rota Island, Northern Mariana Islands, long identified as Partula gibba (Partulidae), is a different species." ZooKeys 1037 (May 17, 2021): 105–18. http://dx.doi.org/10.3897/zookeys.1037.56303.

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Tree snails in the family Partulidae are widespread across the tropical Pacific, with endemic species occurring on most high islands. Partulid species have faced catastrophic range reductions and extinctions due primarily to introduced predators. Consequently, most extant species are threatened with imminent extinction. The U.S. administered Mariana Islands, consisting of Guam in the South and the Commonwealth of the Northern Mariana Islands (CNMI) in the north, historically harbored six endemic partulid species, half of which are thought to be extinct. While conducting a phylogenetic assessment of Partula gibba, an extant tree-snail with a range spanning at least seven islands within the archipelago, it was discovered that what has been identified as P. gibba on the island of Rota is a misidentified cryptic species. Here we use molecular phylogenetics, shell morphometrics and reproductive anatomy to describe it as a new species, Partula lutaensissp. nov.. Because the new species has suffered population declines and has a restricted range, consisting solely of the small island of Rota, we highlight the urgent need for conservation measures.

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ZARONES, LAINIE, MELANIE R. COLÓN, JAMES C. HA, and RENEE R. HA. "Effects of foliage invertebrate availability and forest structure on the abundance of the critically endangered Rota White-eye Zosterops rotensis in Rota, Mariana Islands." Bird Conservation International 23, no. 4 (April 10, 2013): 454–62. http://dx.doi.org/10.1017/s0959270912000470.

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SummaryThe Rota White-eye, Zosterops rotensis, is a critically endangered species endemic to the island of Rota, in the Mariana Islands, western Micronesia. There has been a dramatic decline in both its population size and range over the past few decades. The population, estimated at approximately 1,000 individuals in 1999, is found exclusively in 300 ha of mature limestone forest, though nearby areas of mature limestone forest remain unoccupied. We compared the bird community, vegetation characteristics and foliage-invertebrate density in forest plot pairs with known high and low densities of Rota White-eyes. Discriminant function analysis suggested that certain vegetation characteristics were best at predicting whether a plot was high-density or low-density. High-density plots had more stems with 20–50 cm DBH, more foliage intercepts at 3–9 m, more epiphytes, greater total canopy cover and fewer overall plant species. This information is essential for the protection of the current habitat of the Rota White-eye and for future efforts in the protection and management of this species.

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Sussman, Adrienne F., Renee Robinette Ha, and Hilary E. Henry. "Attitudes, knowledge and practices affecting the Critically Endangered Mariana crow Corvus kubaryi and its conservation on Rota, Mariana Islands." Oryx 49, no. 3 (January 22, 2015): 542–49. http://dx.doi.org/10.1017/s0030605313000884.

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AbstractThe population of the Critically Endangered Mariana crow Corvus kubaryi on the island of Rota, Commonwealth of the Northern Marianas Islands, has decreased dramatically in recent years. It is unclear to what extent negative practices by people, such as inappropriate land use or persecution of crows, have contributed to this decline. We conducted a public opinion survey to document ongoing practices towards the crows on Rota, to assess residents’ knowledge of and attitudes towards the birds, and to gauge potential responses to a government-instituted land incentive programme. Enumerators administered surveys in person during August 2011. Most of the 573 respondents were native Chamorro residents (75%) and more than half were landowners (62%). A majority of respondents (72%) considered environmental issues ‘very important’ and 76% knew of the Mariana crow's Critically Endangered status. Fewer respondents (55%) expressed concern about the bird going extinct. A number of respondents condoned shooting and chasing crows (17 and 52%, respectively), suggesting that residents may be harassing the birds. Chamorro landowners on the island were more likely to have negative attitudes towards the crows and to know people who persecute the crows than other island residents. Education was positively correlated with knowledge and concern about the crow and environmental issues, suggesting that new educational programmes on Rota may help improve residents’ attitudes towards the species. In addition, we recommend a revision of current land-use regulations and implementation of a monetary compensation programme for owners of crow nesting habitat to improve landowners’ attitudes and practices.

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Camp, Richard J., Kevin W. Brinck, P. Marcos Gorresen, Fred A. Amidon, Paul M. Radley, S. Paul Berkowitz, and Paul C. Banko. "Current Land Bird Distribution and Trends in Population Abundance Between 1982 and 2012 on Rota, Mariana Islands." Journal of Fish and Wildlife Management 6, no. 2 (September 1, 2015): 511–40. http://dx.doi.org/10.3996/112014-jfwm-085.

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Abstract The western Pacific island of Rota is the fourth largest human-inhabited island in the Mariana archipelago and designated an Endemic Bird Area. Between 1982 and 2012, 12 point-transect distance-sampling surveys were conducted to assess bird population status. Surveys did not consistently sample the entire island; thus, we used a ratio estimator to estimate bird abundances in strata not sampled during every survey. Trends in population size were reliably estimated for 11 of 13 bird species, and 7 species declined over the 30-y time series, including the island collared-dove Streptopelia bitorquata, white-throated ground-dove Gallicolumba xanthonura, Mariana fruit-dove Ptilinopus roseicapilla, collared kingfisher Todiramphus chloris orii, Micronesian myzomela Myzomela rubratra, black drongo Dicrurus macrocercus, and Mariana crow Corvus kubaryi. The endangered Mariana crow (x̄ = 81 birds, 95% CI 30–202) declined sharply to fewer than 200 individuals in 2012, down from 1,491 birds in 1982 (95% CI = 815–3,115). Trends increased for white tern Gygis alba, rufous fantail Rhipidura rufifrons mariae, and Micronesian starling Aplonis opaca. Numbers of the endangered Rota white-eye Zosterops rotensis declined from 1982 to the late 1990s but returned to 1980s levels by 2012, resulting in an overall stable trend. Trends for the yellow bittern Ixobrychus sinensis were inconclusive. Eurasian tree sparrow Passer montanus trends were not assessed; however, their numbers in 1982 and 2012 were similar. Occupancy models of the 2012 survey data revealed general patterns of land cover use and detectability among 12 species that could be reliably modeled. Occupancy was not assessed for the Eurasian tree sparrow because of insufficient detections. Based on the 2012 survey, bird distribution and abundance across Rota revealed three general patterns: 1) range restriction, including Mariana crow, Rota white-eye, and Eurasian tree sparrow; 2) widespread distribution, low abundance, including collared kingfisher, island collared-dove, white-throated ground-dove, Mariana fruit-dove, white tern, yellow bittern, black drongo, and Micronesian myzomela; and 3) widespread distribution, high abundance, including rufous fantail and Micronesian starling. The Mariana crow was dispersed around the periphery of the island in steep forested land-cover types. In contrast, the Rota white-eye was restricted to the high-elevation mesa. Only for the white-throated ground-dove was there a significant difference among cover types, with lower occupancy in open field than in forested areas. Vegetation was included in the best-fit occupancy models for yellow bittern, black drongo, Micronesian myzomela, and Micronesian starling, but vegetation type was not a significant variable nor included in the top models for the remaining five species: white tern, island collared-dove, Mariana fruit-dove, collared kingfisher, and rufous fantail. Given declining population trends, the Rota bird-monitoring program could benefit from establishing threshold and alert limits and identifying alternative research and management actions. Continued monitoring and demographic sampling, in conjunction with ecological studies, are needed to understand why most bird species on Rota are declining, identify the causative agents, and assess effectiveness of conservation actions, especially for the Mariana crow.

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Masterson, Joseph Scott, and Jerome Harrison Hilton. "A Logistical Response to the Grounding of the M/T Shogun1." International Oil Spill Conference Proceedings 1999, no. 1 (March 1, 1999): 1103–5. http://dx.doi.org/10.7901/2169-3358-1999-1-1103.

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ABSTRACT On November 6, 1997, the M/T Shogun ran aground off the coast of Rota, an island in the Commonwealth of the Northern Marianas Islands. The resulting successful salvage response, which lasted 9 days, prevented the occurrence of a major oil spill in a pristine island environment. The response was managed by a Unified Command established under the Incident Command System (ICS) and consisted of the responsible party, U.S. Coast Guard (USCG), and the Commonwealth of the Northern Marianas Islands Emergency Management Office (EMO). Logistical problems, which can be directly attributed to the remote location of the island, were identified and ultimately drove almost every aspect of the response. The Logistics Section, however, repeatedly found solutions to these problems allowing the Unified Command to mount a successful response. This poster presentation seeks to display the remoteness of Rota's location, the logistical difficulties encountered during the response, and the methods used by the Unified Command to successfully overcome them.

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N. Reed, Robert, Kristin A. Bakkegard, Glenn E. Desy, and Sheldon M. Plentovich. "Diet composition of the invasive cane toad (Chaunus marinus) on Rota, Northern Mariana Islands." Pacific Conservation Biology 13, no. 3 (2007): 219. http://dx.doi.org/10.1071/pc070219.

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The cane or marine toad (Chaunus marinus, formerly Buto marinus) was introduced to the Northern Mariana Islands starting in the 1930s. The effects of this exotic predator on native vertebrates (especially lizards) are largely unknown. We analysed the stomach contents of 336 cane toads collected from the island of Rota, with the goal of estimating the level of toad predation on native vertebrates. Beetles, ants, millipedes, and grasshoppers/crickets comprised the majority of prey classes consumed by toads. The introduced Brahminy blindsnake (Ramphotyphlops braminus; N = 6) and conspecific cane toads (N = 4) were the vertebrates most commonly found in toad stomachs. Skinks (Emoia; N = 2) were the only native vertebrates represented in our sample. The small numbers of nocturnal terrestrial vertebrates native to Rota likely translates to relatively low rates of predation by cane toads on native vertebrates.

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ZARONES, LAINIE, ADRIENNE SUSSMAN, JOHN M. MORTON, SHELDON PLENTOVICH, SARAH FAEGRE, CELESTINO AGUON, ARJUN AMAR, and RENEE ROBINETTE HA. "Population status and nest success of the Critically Endangered Mariana Crow Corvus kubaryi on Rota, Northern Mariana Islands." Bird Conservation International 25, no. 2 (October 8, 2014): 220–33. http://dx.doi.org/10.1017/s0959270914000045.

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SummaryThe Mariana Crow Corvus kubaryi is a Critically Endangered species found only on the island of Rota, Northern Mariana Islands. It was extirpated from the neighbouring island of Guam by the introduced brown tree snake Boiga irregularis and the Rota population has been in decline since at least 1995. We identified only 60 pairs present on Rota in 2007 compared with an estimated 117 pairs in 1998, a decline of nearly 50% in nine years. The decline may be linked to proximity to human activities, though more data are needed. We monitored 204 crow nests between the 1996 and 2009 breeding seasons. Crows initiate clutches between August and April. The overall estimate of nest success was 25.7% (n = 204). On average 49% of pairs produced at least one fledgling per season. The mean number of fledglings per pair per year is 0.66. Mean clutch size was 2.6 (n = 82), mean number of nestlings was 1.4 (n = 106), and mean number of fledglings per nest was 1.3 (n = 68). Daily survival rates declined in later years, and increased during the nest cycle. The number of pairs with successful nests did not change during the study period, nor did the number of fledglings per pair. Predation appeared to be the primary cause of nest failure. The breeding season lasted around nine months and pairs re-nested after failure. Predation of adults and juveniles by cats, combined with possible inbreeding depression, habitat disturbance and human persecution appear to be the cause of decline of the Mariana Crow. We strongly recommend a programme of invasive predator control, habitat maintenance, and captive rearing to ensure the species’ survival.

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AMAR, ARJUN, FRED AMIDON, BEATRIZ ARROYO, JACOB A. ESSELSTYN, and ANN P. MARSHALL. "POPULATION TRENDS OF THE FOREST BIRD COMMUNITY ON THE PACIFIC ISLAND OF ROTA, MARIANA ISLANDS." Condor 110, no. 3 (August 2008): 421–27. http://dx.doi.org/10.1525/cond.2008.8560.

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KIRCHMAN, JEREMY J., and DAVID W. STEADMAN. "Rails (Rallidae: Gallirallus) from prehistoric archaeological sites in Western Oceania." Zootaxa 1316, no. 1 (September 18, 2006): 1. http://dx.doi.org/10.11646/zootaxa.1316.1.1.

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We evaluate the species-level systematics of 1336 bones of Gallirallus (Aves: Rallidae) from Pleistocene and Holocene archaeological sites in the Mariana Islands (Micronesia) and the Bismarck Archipelago and Solomon Islands (Melanesia) and describe four new species. In the Marianas, sites on Rota, Aguiguan, Tinian, and Saipan have yielded 15, 219, 1047, and 16 bones, respectively, that we refer to Gallirallus. We describe the bones from three islands as the new species G. temptatus (Rota), G. pisonii (Aguiguan), and G. pendiculentus (Tinian). Each species is presumed endemic to each island and probably evolved from colonizations by extant, volant G. philippensis. They vary in the reduction of pectoral and wing elements relative to leg elements, and thus in their degree of flightlessness. The limited material from Saipan we cannot distinguish reliably from that of G. philippensis, which is widespread in Melanesia and Polynesia but occurs today in Micronesia only on Palau. Twenty-one fragmentary bones of Gallirallus from four Pleistocene cave sites on New Ireland (Bismarcks) are described as a new, possibly flightless species, G. ernstmayri. One Pleistocene cave site on Buka (Solomons) revealed 18 specimens that we refer to Gallirallus woodfordi and G. rovianae, which occur today in the Solomons. These descriptions of rail bones from Western Oceania bring the total number of fossil (prehistorically extinct) Gallirallus species to eleven.

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AMIDON, FRED, RICHARD J. CAMP, ANN P. MARSHALL, THANE K. PRATT, LAURA WILLIAMS, PAUL RADLEY, and JUSTINE B. CRUZ. "Terrestrial bird population trends on Aguiguan (Goat Island), Mariana Islands." Bird Conservation International 24, no. 4 (April 2, 2014): 505–17. http://dx.doi.org/10.1017/s0959270914000021.

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SummaryThe island of Aguiguan is part of the Mariana archipelago and currently supports populations of four endemic species, including one endemic genus, Cleptornis. Bird population trends since 1982 were recently assessed on the neighbouring islands of Saipan, Tinian, and Rota indicating declines in some native species. Point-transect surveys were conducted in 2008 by the U.S. Fish and Wildlife Service to assess population densities and trends on Aguiguan. Densities for six of the nine native birds—White-throated Ground-dove Gallicolumba xanthonura, Collared Kingfisher Todiramphus chloris, Rufous Fantail Rhipidura rufifrons, Golden White-eye Cleptornis marchei, Bridled White-eye Zosterops conspicillatus and Micronesian Starling Aplonis opaca—and the non-native bird—Island Collared-dove Streptopelia bitorquata—were significantly greater in 2008 than in 1982. No differences in densities were detected among the surveys for Mariana Fruit-dove Ptilinopus roseicapilla, and Micronesian Myzomela Myzomela rubratra. Three federally and locally listed endangered birds—Nightingale Reed-warbler Acrocephalus luscinius, Mariana Swiftlet Collocalia bartschi, and Micronesian Megapode Megapodius laperous)—were either not detected during the point-transect counts, the surveys were not appropriate for the species, or the numbers of birds detected were too small to estimate densities. The factors behind the increasing trends for some species are unknown but may be related to increased forest cover on the island since 1982. With declining trends for some native species on neighbouring islands, the increasing and stable trends on Aguiguan is good news for forest bird populations in the region, as Aguiguan populations can help support conservation efforts on other islands in the archipelago.

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Reagan, Mark K., Barry B. Hanan, Matthew T. Heizler, Brian S. Hartman, and Rosemary Hickey-Vargas. "Petrogenesis of Volcanic Rocks from Saipan and Rota, Mariana Islands, and Implications for the Evolution of Nascent Island Arcs." Journal of Petrology 49, no. 3 (January 30, 2008): 441–64. http://dx.doi.org/10.1093/petrology/egm087.

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Wandrag, Elizabeth M., Amy E. Dunham, Richard P. Duncan, and Haldre S. Rogers. "Seed dispersal increases local species richness and reduces spatial turnover of tropical tree seedlings." Proceedings of the National Academy of Sciences 114, no. 40 (August 28, 2017): 10689–94. http://dx.doi.org/10.1073/pnas.1709584114.

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Dispersal is thought to be a key process underlying the high spatial diversity of tropical forests. Just how important dispersal is in structuring plant communities is nevertheless an open question because it is very difficult to isolate dispersal from other processes, and thereby measure its effect. Using a unique situation, the loss of vertebrate seed dispersers on the island of Guam and their presence on the neighboring islands of Saipan and Rota, we quantify the contribution of vertebrate seed dispersal to spatial patterns of diversity of tree seedlings in treefall gaps. The presence of vertebrate seed dispersers approximately doubled seedling species richness within canopy gaps and halved species turnover among gaps. Our study demonstrates that dispersal plays a key role in maintaining local and regional patterns of diversity, and highlights the potential for ongoing declines in vertebrate seed dispersers to profoundly alter tropical forest composition.

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Leo, Brian T., James J. Anderson, Reese Brand Phillips, and Renee R. Ha. "Home Range Estimates of Feral Cats (Felis catus) on Rota Island and Determining Asymptotic Convergence." Pacific Science 70, no. 3 (July 2016): 323–31. http://dx.doi.org/10.2984/70.3.4.

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Kolinski, Steven P., Ronald K. Hoeke, Stephani R. Holzwarth, Larry I. Ilo, Evelyn F. Cox, Robert C. O'Conner, and Peter S. Vroom. "Nearshore Distribution and an Abundance Estimate for Green Sea Turtles, Chelonia mydas, at Rota Island, Commonwealth of the Northern Mariana Islands." Pacific Science 60, no. 4 (2006): 509–22. http://dx.doi.org/10.1353/psc.2006.0032.

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PENNESI, Chiara, ROKSANA MAJEWSKA, FRITHJOF A. S. STERRENBURG, CECILIA TOTTI, and MARIO DE STEFANO. "Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov." Phytotaxa 336, no. 3 (February 2, 2018): 201. http://dx.doi.org/10.11646/phytotaxa.336.3.1.

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We present here an ultrastructure-based revision of the diatom genus Anorthoneis using both light (LM) and electron microscopy (SEM). The original slides and type material of all known Anorthoneis species were analysed and new, previously unseen, morphological features of the frustules, such as rota-like vela and ligulate structures around the valve margin, were revealed. The phylogenetic relationships among Anorthoneis taxa were investigated based on morphological characters using a maximum parsimony method. This analysis indicated a large, well-supported clade that included taxa that exhibited similarities in external and internal details of the central areas in both raphe-sternum and sternum valves. Revealed synapomorphies within the genus include externally and internally transversely dilated central area on both sides of the raphe-sternum valve, externally transversely dilated central area on both sides of the sternum valve, sternum valve striae parallel at the center and radiate at the apices, and areolae with hymenes in both valves. During a survey a new species Anorthoneis arthus-bertrandii sp. nov., was found on seagrass leaves collected from Siladen Island (Indonesia). This taxon is sister to A. hyalina, but can be easily differentiated from the latter by smaller valve dimensions, central area size and shape, and rota-like vela occluding sternum valve areolae - a feature that has never been observed in other Anorthoneis taxa.

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AMAR, ARJUN, and JACOB A. ESSELSTYN. "Positive association between rat abundance and breeding success of the Critically Endangered Mariana Crow Corvus kubaryi." Bird Conservation International 24, no. 2 (March 28, 2013): 192–200. http://dx.doi.org/10.1017/s095927091300018x.

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SummaryDiagnosing the causes of population declines of highly endangered species is vital to ensure that appropriate conservation measures are undertaken. Although experiments can provide critical information on potential causes, these can be time consuming and costly, and so it is important to determine the most plausible hypothesis for such tests. The last wild population of the Critically Endangered Mariana Crow Corvus kubaryi has been declining rapidly on Rota in the Mariana Islands. Because nest predation by introduced rats Rattus spp. has been implicated in the declines of other Pacific island birds, we tested for a correlation between breeding success of Mariana Crows and abundance of rats R. diardii surrounding their nest sites. If rats are a contributing factor in this species’s decline, we predicted that breeding success would be lower in areas where rats were more abundant. In complete contrast to this prediction, we found that breeding success was significantly higher where rats were most abundant, suggesting that rats are unlikely to be a major driving force behind the decline in this species. The positive association between crow breeding success and rat abundance suggests these species may be responding to similar habitat needs or a shared predator. This study illustrates the importance of gathering sufficient knowledge on the ecology of a species prior to undertaking costly, logistically difficult and time consuming experiments.

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Pollock, Henry S., Evan C. Fricke, Evan M. Rehm, Martin Kastner, Nicole Suckow, Julie A. Savidge, and Haldre S. Rogers. "Såli (Micronesian starling – Aplonis opaca) as a key seed dispersal agent across a tropical archipelago." Journal of Tropical Ecology 36, no. 2 (January 17, 2020): 56–64. http://dx.doi.org/10.1017/s0266467419000361.

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AbstractSeed dispersal is an important ecological process that structures plant communities and influences ecosystem functioning. Loss of animal dispersers therefore poses a serious threat to forest ecosystems, particularly in the tropics where zoochory predominates. A prominent example is the near-total extinction of seed dispersers on the tropical island of Guam following the accidental introduction of the invasive brown tree snake (Boiga irregularis), negatively impacting seedling recruitment and forest regeneration. We investigated frugivory by a remnant population of Såli (Micronesian starling – Aplonis opaca) on Guam and two other island populations (Rota, Saipan) to evaluate their ecological role as a seed disperser in the Mariana archipelago. Using a combination of behavioural observations, nest contents and fecal samples, we documented frugivory of 37 plant species. Native plants comprised the majority (66%) of all species and 90% of all seeds identified in fecal and nest contents. Diet was highly similar across age classes and sampling years. In addition, plant species consumed by Såli comprised 88% of bird-dispersed adult trees and 54% of all adult trees in long-term forest monitoring plots, demonstrating the Såli’s broad diet and potential for restoring native forests. Overall, we provide the most comprehensive assessment to date of frugivory by the Såli and confirm its importance as a seed disperser on Guam and throughout the Marianas.

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Darlan, Yudi, and Udaya Kamiludin. "RONA LINGKUNGAN GEOLOGI KELAUTAN DI PERAIRAN P. ROTE NUSA TENGGARA TIMUR." JURNAL GEOLOGI KELAUTAN 11, no. 3 (February 16, 2016): 149. http://dx.doi.org/10.32693/jgk.11.3.2013.239.

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Sejalan dengan perubahan Pulau Rote dari Pemerintahan Kecamatan menjadi Kabupaten, pembangunan infrastruktur pesisir dan sektor lainnya di pulau ini meningkat. Pembangunan tersebut dari tahun ke tahun dapat menimbulkan perubahan kondisi lingkungan pesisir dan perairan Pulau Rote. Perubahan kondisi lingkungan dapat diidentifikasi melalui analisis data rona lingkungan. Data seismik memperlihatkan morfologi teras-teras pantai, dan intrusi diapir serpih di perairan Pulau Rote yang mengiindikasikan pulau ini mengalami proses pengangkatan sejak ribuan tahun yang lalu hingga sekarang. Sedimen permukaan dasar laut Pulau Rote terdiri atas pasir dan pasir lanauan mengandung mineral kuarsa, piroksen, mineral karbonatan dan cangkang moluska menunjukkan kondisi lingkungan sedimentasi rendah. Baku Mutu air dan sedimen permukaan dasar laut di perairan Pulau Rote dalam kondisi baik. Jenis pantainya berupa pantai berenergi tinggi, pantai erosi, pantai teluk, dan pantai kantong pasir masih dalam kondisi baik dan cukup bagus bagi wisata pantai dan laut. Hasil penelitian ini menunjukkan sebagain besar kondisi lingkungan perairan Pulau Rote masih dalam kondisi baik. Sebagian kecil ada perubahan sebagai dampak aktivitas manusia. Kata kunci: rona lingkungan, geologi kelautan, intrusi, diapir serpih, Nusa Tenggara Timur, Pulau Rote Since the Rote Island government changed from the Kecamatan to Kabupaten Government, the development of coastal infrastructures and other sectors in the island increased. The development from time to time can lead to changes in coastal and marine environmental of the Rote Island. The environmental conditions can be identified through analysis environmental base data. The seismic data shows the morphology of coastal terraces, and intrusion of shale diapir in the Rote Island waters which indicate that this island has uplifted since thousands years ago until now. Surficial sediment of the Rote Island waters consists of sand and silty sand containing quartz and pyroxene minerals, and shells of mollusks which indicate low sedimentation environment. The standard quality of surface water and surficial sediment of the Rote Island is still in good condition. Coastal characteristics of this island consist of high-energy beaches, sand pocket beaches, bays, and erosion coasts which are still in good condition and suitable for tourism. This study shows that in general the environment of the Rote Island waters environment is normal conditions. A few of environmental changes is as an impact of human activities. Keywords: environment features, intrusion, shale diapir, Nusa Tenggara Timur, Rote island.

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Schumann, R. Randall, Scott A. Minor, Daniel R. Muhs, and Jeffrey S. Pigati. "Landscapes of Santa Rosa Island, Channel Islands National Park, California." Monographs of the Western North American Naturalist 7, no. 1 (January 2014): 48–67. http://dx.doi.org/10.3398/042.007.0108.

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Anggara, Tombus Lucas, Lintang P. S. Yuliadi, Yudi Nurul Ihsan, and M. Rudyansyah Ismail. "Composition of Microplastics Of Coastal Sediments In Kupang and Rote Isalnd, East Nusa Tenggara." Omni-Akuatika 15, no. 2 (November 20, 2019): 98. http://dx.doi.org/10.20884/1.oa.2019.15.2.707.

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This research was conducted at the Kupang dan Rote Islands, East Nusa Tenggara in June until November 2018. This research using Wet Peroxide Oxidation methods and aims to obtain data on microplastics distributin that accumulates in coastal sediments in Kupang and Rote Islands. A result of this research shows that the lowest coast is Ndana Beach at 5 particles/400gr and Pasir Panjang has the highest microplastics abundancre of 23 particles/400gr. A microplastics obtained are fragments, fibers and films but for films that are obtained in 2 stations is Oenggae Beach and Pasir Panjang Beach. A microplastics colors obtained are black, blue, yellow, red, green and white and for sizes small microplastics dominant in all stations. Keywords: Kupang and Rote Island, Microplastic, Coastal Sediments, Wet Peroxide Oxdation

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Stanley, Thomas R., Susan Teel, Linnea S. Hall, Linda C. Dye, and Lyndal L. Laughrin. "Population size of Island loggerhead shrikes on Santa Rosa and Santa Cruz Islands." Wildlife Society Bulletin 36, no. 1 (February 1, 2012): 61–69. http://dx.doi.org/10.1002/wsb.108.

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Rick, Torben C., John S. Wah, and Jon M. Erlandson. "Re-evaluating the origins of late Pleistocene fire areas on Santa Rosa Island, California, USA." Quaternary Research 78, no. 2 (July 21, 2012): 353–62. http://dx.doi.org/10.1016/j.yqres.2012.06.006.

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AbstractAt the close of the Pleistocene, fire regimes in North America changed significantly in response to climate change, megafaunal extinctions, anthropogenic burning and possibly, even an extraterrestrial impact. On California's Channel Islands, researchers have long debated the nature of late Pleistocene “fire areas,” discrete red zones in sedimentary deposits, interpreted by some as prehistoric mammoth-roasting pits created by humans. Further research found no evidence that these red zones were cultural in origin, and two hypotheses were advanced to explain their origin: natural fires and groundwater processes. Radiocarbon dating, X-ray diffraction analysis, and identification of charcoal from six red zones on Santa Rosa Island suggest that the studied features date between ~ 27,500 and 11,400 cal yr BP and resulted from burning or heating, not from groundwater processes. Our results show that fire was a component of late Pleistocene Channel Island ecology prior to and after human colonization of the islands, with no clear evidence for increased fire frequency coincident with Paleoindian settlement, extinction of pygmy mammoths, or a proposed Younger Dryas impact event.

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Muhs, Daniel R., Kathleen R. Simmons, Lindsey T. Groves, John P. McGeehin, R. Randall Schumann, and Larry D. Agenbroad. "Late Quaternary sea-level history and the antiquity of mammoths (Mammuthus exilisandMammuthus columbi), Channel Islands National Park, California, USA." Quaternary Research 83, no. 3 (May 2015): 502–21. http://dx.doi.org/10.1016/j.yqres.2015.03.001.

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Fossils of Columbian mammoths (Mammuthus columbi) and pygmy mammoths (Mammuthus exilis) have been reported from Channel Islands National Park, California. Most date to the last glacial period (Marine Isotope Stage [MIS] 2), but a tusk ofM. exilis(or immatureM. columbi) was found in the lowest marine terrace of Santa Rosa Island. Uranium-series dating of corals yielded ages from 83.8 ± 0.6 ka to 78.6 ± 0.5 ka, correlating the terrace with MIS 5.1, a time of relatively high sea level. Mammoths likely immigrated to the islands by swimming during the glacial periods MIS 6 (~ 150 ka) or MIS 8 (~ 250 ka), when sea level was low and the island–mainland distance was minimal, as during MIS 2. Earliest mammoth immigration to the islands likely occurred late enough in the Quaternary that uplift of the islands and the mainland decreased the swimming distance to a range that could be accomplished by mammoths. Results challenge the hypothesis that climate change, vegetation change, and decreased land area from sea-level rise were the causes of mammoth extinction at the Pleistocene/Holocene boundary on the Channel Islands. Pre-MIS 2 mammoth populations would have experienced similar or even more dramatic changes at the MIS 6/5.5 transition.

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ROTA, EMILIA, PATRICK J. SCHEMBRI, and PIETRO OMODEO. "Earthworms of Malta (Annelida: Clitellata: Acanthodrilidae, Hormogastridae, Lumbricidae)." Zootaxa 4311, no. 2 (August 23, 2017): 287. http://dx.doi.org/10.11646/zootaxa.4311.2.11.

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The oldest museum specimens of earthworms from Malta are two adult lumbricids collected in 1878 by Enrico Hillyer Giglioli, then director of the Royal Zoological Museum in Florence, during the cruise of the R. Goletta Olga in the Mediterranean islands. The material, still preserved in Florence (S. Cianfanelli, in litteris), was determined by Baldasseroni (1907) who assigned it to Octolasium transpadanum Rosa, 1884. This remained the only species reported from Malta in the literature for over one century (Michaelsen 1908; Pop 1948; Rota 2013), until Csuzdi & Sciberras (2014) published a note listing another five lumbricid species and a juvenile hormogastrid. The present paper reports on collections made during 1983–1985 and in 2015, yielding six additional new records for the area.

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Faulkner, Kate Roney. "Bringing Santa Rosa Island into Channel Islands National Park: The Written Documents 1979–1987." Western North American Naturalist 78, no. 4 (November 21, 2017): 930. http://dx.doi.org/10.3398/064.078.0430.

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Jazwa, Christopher S., Terry L. Joslin, and Douglas J. Kennett. "Fishing, Subsistence Change, and Foraging Strategies on Western Santa Rosa Island, California." American Antiquity 85, no. 3 (May 14, 2020): 591–608. http://dx.doi.org/10.1017/aaq.2020.18.

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Shifting from shellfish collecting to fishing as a primary coastal foraging strategy can allow hunter-gatherers to obtain more food and settle in larger populations. On California's northern Channel Islands (NCI), after the development of the single-piece shell fishhook around 2500 cal BP, diet expanded from primarily shellfish to include nearshore fishes in greater numbers. During the Medieval Climatic Anomaly (1150–600 cal BP), settlement on the islands condensed to a small number of large coastal villages with high population densities supported largely by nearshore fish species including rockfishes, surfperches, and señoritas. Faunal data from five sites on western Santa Rosa Island (CA-SRI-15, -31, -97, -313, and -333) demonstrate an increase in nearshore fishing through time. We argue that demographic changes that occurred on the northern Channel Islands were accompanied by changes in subsistence strategies that were related in part to risk of failure when attempting to acquire different resources. As population density increased, the low-risk strategy of shellfish harvesting declined in relative importance as a higher-risk strategy of nearshore fishing increased. While multiple simultaneous subsistence strategies are frequently noted among individual hunter-gatherer communities in the ethnographic record, this study provides a framework to observe similar patterns in the archaeological record.

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Braje, Todd J., and Linda Bentz. "The Archaeology of Overseas Chinese Abalone Fishermen on Santa Rosa Island, Alta California海外华人鲍鱼渔民在加州中北部圣罗莎岛之考古研究." Journal of Chinese Overseas 11, no. 1 (May 8, 2015): 87–103. http://dx.doi.org/10.1163/17932548-12341299.

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In the mid-nineteenth century, Chinese immigrants to Gold Rush California built the first commercial abalone fishery along North America’s west coast. Their efforts to establish an abalone meat and shell industry have been relegated to a footnote in Californian history, with only occasional newspaper accounts and other historical documents as the primary means to understand the ways of life and the activities of these maritime pioneers. Over the last decade, archaeologists have become increasingly interested in documenting the material record of Chinese abalone fishing on California’s Northern Channel Islands. Here, we describe recent efforts to locate, map, and describe the archaeological record of historical abalone fishing on Santa Rosa Island. Our survey identified a specific island abalone harvesting pattern characterized by small, logistical processing camps and larger more diverse basecamps. Our findings can be applied when interpreting historical abalone fishing sites elsewhere, and to inform future surveys for these island site types.

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Tussadiah, Armyanda, Joko Subandriyo, Sari Novita, and Widodo Setyo Pranowo. "VERIFICATION OF PISCES DISSOLVED OXYGEN MODEL USING IN SITU MEASUREMENT IN BIAK, ROTE, AND TANIMBAR SEAS, INDONESIA." International Journal of Remote Sensing and Earth Sciences (IJReSES) 14, no. 1 (June 21, 2017): 37. http://dx.doi.org/10.30536/j.ijreses.2017.v14.a2681.

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Dissolved oxygen (DO) is one of the most chemical primary data in supported life for marine organisms. Ministry of Marine Affairs and Fisheries Republic of Indonesia through Infrastructure Development for Space Oceanography (INDESO) Project provides dissolved oxygen data services in Indonesian Seas for 7 days backward and 10 days ahead (9,25 km x 9.25 km, 1 daily). The data based on Biogeochemical model (PISCES) coupled with hydrodynamic model (NEMO), with input data from satellite acquisition. This study investigated the performance and accuracy of dissolved oxygen from PISCES model, by comparing with the measurement in situ data in Indonesian Seas specifically in three outermost islands of Indonesia (Biak Island, Rote Island, and Tanimbar Island). Results of standard deviation values between in situ DO and model are around two (St.dev ± 2). Based on the calculation of linear regression between in situ DO with the standard deviation obtained a high determinant coefficient, greater than 0.9 (R2 ≥ 0.9). Furthermore, RMSE calculation showed a minor error, less than 0.05. These results showed that the equation of the linear regression might be used as a correction equation to gain the verified dissolved oxygen.

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Nasruddin, Nasruddin. "Prospek Sumber Daya Arkeologi Prasejarah Pulau Rote Ndao dalam Konteks Pengembangan Kawasan Perbatasan." KALPATARU 25, no. 2 (December 1, 2019): 87. http://dx.doi.org/10.24832/kpt.v25i2.101.

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Abstract. The potential of cultural heritage especially prehistoric sites along the karst hills on Rote island has significant value in the context of understanding and knowledge about archeology in East Nusa Tenggara. Cave sites in Rote island were started to be inhabited since the late Pleistocene and early Holocene, based on the presence of human settlement traces found in the caves and niches. Another historical evidence was a bronze axe which showed that Rote Island was a strategic region on Paleometalic era. The fragments of potteries, flakes, animal bones, dan mollusc shells found in the area sprang some questions if this area was used only as a settlement or had any other purposes. The aim of this research is to reveal the archaeological resources owned by the island, along with its geological condition. The method applied in this study is using field observation (survey) followed by excavation on prehistory sites that represent Rote Ndao human settlements. Numerous lithic artifacts were gathered for reasearch data, such as flakes, pottery, and mollusc shell and bone deposits. These data about prehistoric karst in Rote Ndao island have important value to reveal the migration path, particularly its geographic position as the foremost island and borderline region between East Timor and Australia. Abstrak. Potensi warisan budaya terutama situs-situs prasejarah di sepanjang bukit-bukit karst di Pulau Rote memiliki nilai penting dalam konteks pemahaman dan pengetahuan arkeologi Nusa Tenggara Timur. Situs-situs gua karst di Pulau Rote, dimulai pada masa akhir Pleistosen dan awal Holosen dengan adanya jejak-jejak hunian manusia di gua dan ceruk. Bukti historis lainnya adanya temuan kapak perunggu yang menunjukkan bahwa Pulau Rote merupakan wilayah yang strategis pada era paleometalik. Ditemukannya berbagai jenis pecahan tembikar, serpih dan fragmen tulang fauna, sisa-sisa makanan moluska menimbulkan beberapa pertanyaan terhadap lokasi ini di masa lalu, apakah situs ini memiliki fungsi hunian semata, ataukah mempunyai fungsi lain. Tujuan penelitian ini untuk mengungkap sumberdaya arkeologi beserta kondisi geologi yang dimiliki Pulau Rote. Metode yang digunakan yaitu melakukan observasi lapangan (survei) dan dilanjutkan dengan ekskavasi terhadap situs yang memiliki indikasi kuat sebagai hunian prasejarah Rote dan dianggap mewakili situs hunian prasejarah Rote Ndao. Dari penelitian ini diperoleh sejumlah data artefak litik berupa alat-alat serpih, tembikar dan deposit cangkang moluska dan tulang. Potensi data arkeologi (prasejarah karst) Pulau Rote Ndao memiliki nilai penting untuk mengungkap jalur migrasi, terutama posisi geografinya sebagai pulau terdepan dan wilayah perbatasan antara Timor Leste dan Australia.

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Rosa Serafín, Vanessa. "El paisaje insular en la vanguardia: la creación del mito atlántico." Revista de Filología de la Universidad de La Laguna, no. 42 (2021): 227–39. http://dx.doi.org/10.25145/j.refiull.2021.42.14.

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This work focuses on the change of paradigm that the Canarian avant-garde involved, led by the generation of the magazine Rosa de los Vientos, in relation to the representation of the landscapes. On the visual arts, the artists from the «Escuela Luján Pérez» began this new modernity. We situate ourselves during the last years of the twenties and the first half of the thirties, one of the most flourishing cultural times in the Canary Islands. The island landscape is observed with new eyes, what involves the creation of a new regionalism that puts aside the northern landscape and focuses the attention on the dryness and lack of colour of the south of the island, which reaches the spiritual dimension through the geometrical elements like the “cardon” or “pitera”. This is, in brief, an essential landscape, as it is expressed by Pedro García Cabrera in El hombre en función del paisaje.

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Thomson, Lex A. J., Paul A. Geraghty, and William H. Wilson. "Hawaiian seascapes and landscapes: reconstructing elements of a Polynesian ecological knowledge system." Journal of the Polynesian Society 129, no. 4 (December 2020): 407–46. http://dx.doi.org/10.15286/jps.129.4.407-446.

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Kaute and its derivatives koute, ʻoute and ʻaute are Polynesian names for a red-flowered Hibiscus. Since its first botanical collection on Tahiti by Banks and Solander (1769), this hibiscus has been referred to as H. rosa-sinensis L. and assumed to have been introduced by the bearers of the archaeological culture known as Lapita. Lapita people settled West Polynesia around 2800 BP and spoke a language derived from Proto-Oceanic, the common ancestor of almost all the Austronesian languages of Island Melanesia and Micronesia as well as Polynesia. However, whereas Proto-Oceanic names can be reconstructed for many plants found in East Polynesia, the term kaute cannot be attributed to Proto-Oceanic, the name likely being locally derived in East Polynesia from that of paper mulberry (Broussonetia papyrifera (L.) L’Hér. ex Vent.). On the basis of linguistic evidence, we contend that kaute was domesticated in a high island area of Central Eastern Polynesia and then dispersed in relatively recent pre-European times (ca. 500–700 BP) westwards through West Polynesia, to nearby islands such as the Fiji archipelago and Rotuma and to Polynesian Outliers in Papua New Guinea and the Solomon Islands. Dissemination occurred before the -au- sequence changed to -ou- and k sporadically changed to ʻ, so that kaute rather than contemporary Marquesan koute and ʻoute was the term that was carried westward from the Marquesas. Kaute is here suggested to be an endemic East Polynesian species, different from H. rosa-sinensis L. Further field and genetic research is needed to definitively determine the phylogenetic relationships of kaute and a taxonomic description is required for formal recognition.

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Therik, Wilson M. A. "RELASI NEGARA DAN MASYARAKAT DI ROTE." KRITIS 24, no. 1 (August 11, 2016): 3–20. http://dx.doi.org/10.24246/kritis.v24i1p3-20.

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This article abstracted from dissertation entitled “State and Society’s Relation in Rote”. This article discusses the relation between the state and society in Rote Island. Rote Island (Rote Ndao District) consisted of 19 Kingdom (Nusak) with different culture, language, and customs on each Nusak. Nusak divides the government structure into 3 (three) functions: First is the executive institution body which run custom law, second is the legislative body which make custom law, and third is the judicative body which monitoring custom law. By this condition, Nusak is considered as Ethnic State. From this explanation, Indonesia should be seen as nations state, not as a nation state.

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Manafe, Janri D., Tuty Setyorini, and Yermias A. Alang. "PEMASARAN PARIWISATA MELALUI STRATEGI PROMOSI OBJEK WISATA ALAM, SENI DAN BUDAYA (Studi Kasus di Pulau Rote NTT)." BISNIS : Jurnal Bisnis dan Manajemen Islam 4, no. 1 (September 29, 2016): 101. http://dx.doi.org/10.21043/bisnis.v4i1.1687.

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Development of tourism in Indonesia is in line with the government program to promote tourism as an addition to foreign exchange outside the non-oil sector. One area in Indonesia which has a variety of tourist attractions that the island of Rote. Natural attractions on the island of Rote has many interesting panorama, as a unique tourist attraction. Promotion strategies can be used as a tool to market their tourism products in the form of natural attractions, arts and culture are an excellent product and all the tourism potential that is in place. The research objectives: 1) To describe the profile of nature, art and culture of the island of Rote, 2) To determine the model Rote Island tourism marketing through promotional strategies of natural attractions, art and culture. The method used in this study is a qualitative method using a case study approach regarding the promotion strategies of natural attractions, art and culture of the island of Rote. The research used the ethnographic approach. Ethnography is an empirical and theoretical approaches that aim to get a description and a thorough analysis of culture based on field research (fieldwork) intensive. Sources of information in this study consisted of four people, namely, Head of Promotion, Head Attractions, Head of Culture and Head of Bina Sarana. The technique of collecting data using interviews, observation and documentation. The data were analyzed by using domain analysis. Technique authenticity of data using triangulation sources that checks the accuracy of data on the interview and documentation. The strategy undertaken by the Department of Culture and Tourism Rote Ndao is the author of view is very simple so it does not boost the number of domestic and international tourists who proved in the tables of foreign tourists and Vishnu, who in turn have an impact on revenue receipts for the tourism sector is very small. Therefore essential drawn up a proper marketing strategy, effective and efficient. Tourism Marketing Model Rote- island of Nusa Tenggara Timur Through Promotion Strategy Object Nature Tourism, Arts and Culture Visit To Boost Domestic and International right is through a strategy Promotion Mix (Kotler). Promotion strategy defined Mix 5 (five) are: Advertising (advertising), Sales Promotion (Sales Promotion), Public Relations (PR), the Personal Sales (Personal Selling) and a Direct Marketing (Direct Marketing).

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Anderson, R. Scott, Scott Starratt, Renata M. Brunner Jass, and Nicholas Pinter. "Fire and vegetation history on Santa Rosa Island, Channel Islands, and long-term environmental change in southern California." Journal of Quaternary Science 25, no. 5 (December 29, 2009): 782–97. http://dx.doi.org/10.1002/jqs.1358.

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Gerhanae, Nineu Yayu, and Yani Permanawati. "KANDUNGAN LOGAM BERAT (Cd, Cu, Pb, dan Zn) DALAM AIR LAUT DI PERAIRAN PANTAI TIMUR PULAU ROTE." JURNAL GEOLOGI KELAUTAN 13, no. 2 (February 16, 2016): 99. http://dx.doi.org/10.32693/jgk.13.2.2015.265.

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Pulau Rote merupakan gugusan pulau terdepan NKRI paling selatan yang berbatasan dengan Australia. Pada tahun 2009 terjadi tragedi meledaknya sumur minyak Montana di Blok Atlas Barat Laut Timor yang mengakibatkan pencemaran di perairan Pulau Rote. Hal ini berpotensi dampak pada penurunan kualitas air, ikan tangkap, rumput laut, budidaya mutiara dan rusaknya terumbu karang serta tanaman mangrove. Penelitian Lingkungan dan Geologi Pantai di Perairan Pantai Timur Pulau Rote, Nusa Tenggara Timur dilakukan pada bulan September-Oktober 2012. Dalam penelitian ini, diambil 40 sampel air secara acak dan sesaat tanpa memperhatikan waktu/musim. Tujuan sampel air terpilih digunakan untuk analisis logam berat yaitu kadmium (Cd), tembaga (Cu), timbal (Pb), dan Seng (Zn) dengan menggunakan metoda Atomic Absorption Spectrophotometry (AAS). Tujuan penelitian ini adalah untuk mendapatkan data dan informasi karakteristik kimia air laut untuk mendukung kegiatan wisata bahari. Kualitas logam berat dalam satuan ppm yang terukur berkisar antara : Pb (<0.001-0.017); Cu (<0.001-0.015); Zn (0.008-0.275); Cd (0.0002-0.0005). Nilai status mutu air laut berdasarkan kualitas logam berat yang terukur menurut Metode Storet diketahui : kualitas air laut di perairan termasuk kelas B baik (tercemar ringan) skor -2.Kata kunci kualitas air, logam berat, nilai status mutu, timur Pulau Rote Rote Island is a outers island of southern NKRI which bordering Australia. In 2009, tragedy explosion of oil wells in Block Atlas Montana West Timor which resulted in the pollution of the waters of the island of Rote. This could potentially impact on the quality of water, catching fish, seaweed, pearl cultivation and destruction of coral reefs and mangroves. Environmental and Coastal Geological Research in the Coastal Waters of East Coast Rote Island, East Nusa Tenggara was conducted in September-October 2012. In this study, 40 samples were taken at random and instantaneous water regardless of time / season. Purpose water samples selected for analysis of heavy metals, such as Cadmium (Cd), Cuprum (Cu), Plumbum (Pb), and Zinc (Zn) using the method of Atomic Absorption Spectrophotometry (AAS). The purpose of this study was to obtain data and information on the latest chemical characteristics in seawater to support marine tourism activities. Heavy metals quality in ppm ranges between: Pb (<0.001-0.017); Cu (<0.001-0.015); Zn (0.008-0.275); Cd (0.0002-0.0005). The water quality status value is based on the quality of heavy metals measured according to Storet methods, whereabout : sea water quality status value belongs to the class B good (lightly polluted) score of -2. Keywords: water quality, heavy metal, quality status value, east Rote Island

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Woolsey, Jay, Cause Hanna, Kathryn Mceachern, Sean Anderson, and Brett D. Hartman. "Regeneration and Expansion of Quercus tomentella (Island Oak) Groves on Santa Rosa Island." Western North American Naturalist 78, no. 4 (December 17, 2018): 758. http://dx.doi.org/10.3398/064.078.0415.

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Schumann, R. Randall, Jeffrey S. Pigati, and John P. McGeehin. "Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California." Geomorphology 268 (September 2016): 322–40. http://dx.doi.org/10.1016/j.geomorph.2016.05.033.

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Presson, Jefry, Respati Tri Swasono, Sabirin Matsjeh, Meta Permata Putri, Zulfah Az Zahra, and Lukas Pardosi. "Antimalarial Activity of Sea Sponge Extract of Stylissa massa originating from waters of Rote Island." Jurnal Kimia Sains dan Aplikasi 24, no. 4 (March 23, 2021): 136–45. http://dx.doi.org/10.14710/jksa.24.4.136-145.

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Research on the isolation, toxicity test, antimalarial test, and identification of the active compound from the ethyl acetate fraction of Stylissa massa sponge from Oenggae waters, Rote Island, has been conducted. This study aimed to investigate the antimalarial activity of the ethyl acetate fraction of the Stylissa massa sponge. Isolation was carried out by the extraction method using a mixed solvent of methanol: dichloromethane of 3: 2 (v/v), then the extract was partitioned in a solvent mixture of ethyl acetate: water of 1: 2 (v/v). The ethyl acetate extract obtained was separated by column chromatography using the gradient polarity system method. The toxicity test of each fraction was carried out by the Brine Shrimp Lethality Test (BSLT) method, and the antimalarial test was carried out by the haematin polymerization inhibition method. Identification of compounds from the active fraction in the antimalarial test was carried out using Liquid Chromatography-Mass Spectrometry (LC-MS). The extraction yield was 1.14 g (0.23%) of the ethyl acetate extract in the form of a dark brownish-yellow oily solid. Separation by column chromatography resulted in 15 fractions. Toxicity test results showed the four most active fractions with LC50 values, which are very promising for new drug discovery. The IC50 value in the antimalarial activity test of the four fractions indicated that the Stylissa massa sponge ethyl acetate extract was more active than the standard chloroquine compound (115 μg/mL). The LC-MS analysis indicates that fraction 11 contains two compounds that have been reported, and 1 compound is unknown. In contrast, fraction 14 indicates that it contains three compounds that have been reported and one unknown compound.

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Prawiradilaga, Dewi Malia, Pratibha Baveja, Suparno Suparno, Hidayat Ashari, Nathaniel Sheng Rong Ng, Chyi Yin Gwee, Philippe Verbelen, and Frank Erwin Rheindt. "A COLOURFUL NEW SPECIES OF MYZOMELA HONEYEATER FROM ROTE ISLAND IN EASTERN INDONESIA." TREUBIA 44 (January 11, 2018): 77. http://dx.doi.org/10.14203/treubia.v44i0.3414.

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The avifauna of Rote Island in the Lesser Sundas is not well studied and generally considered to be similar to that of adjacent Timor Island. However, some cases of bird endemism have recently been documented on this island. A population of Myzomela honeyeater is one such example. First observed in October 1990, it has been subsumed with Myzomela dammermani from Sumba Island given its superficially similar appearance. Based on extensive morphological inspection and bioacoustic analysis, we here describe this population as a new taxon to science. Apart from previously overlooked plumage distinctions, the new taxon bioacoustically differs from M. dammermani in the presence or absence of several unique call types and considerable differences across two parameters in shared call types. Considering the importance of bioacoustics in avian species delimitation, we propose that the new Rote Myzomela be considered a distinct species. Given continued habitat conversion across its small range, we propose the International Union for Conservation of Nature and Natural Resources (IUCN) threat status Vulnerable for the species.

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MASUNAGA, KAZUHIRO, and NEAL L. EVENHUIS. "Two new species of the genus Cymatopus Kertész from the Mariana Islands (Diptera: Dolichopodidae)." Zootaxa 3159, no. 1 (January 13, 2012): 36. http://dx.doi.org/10.11646/zootaxa.3159.1.2.

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Two new species of the genus Cymatopus Kertész, 1901, C. femoralis sp. nov. and C. ventralis sp. nov., are described andillustrated from Pagan, Saipan, Rota, and Guam. This is the first record of Cymatopus from the Mariana Islands. A key to all known species of the genus is provided.

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Stewart, B. S., and P. K. Yochem. "Northern Elephant Seals Breeding at Santa Rosa Island, California." Journal of Mammalogy 67, no. 2 (May 15, 1986): 402–3. http://dx.doi.org/10.2307/1380897.

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Mariño, Mónica, Annette Breckwoldt, Mirta Teichberg, Alfred Kase, and Hauke Reuter. "Livelihood aspects of seaweed farming in Rote Island, Indonesia." Marine Policy 107 (September 2019): 103600. http://dx.doi.org/10.1016/j.marpol.2019.103600.

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Cole, Kenneth L., and Geng-Wu Liu. "Holocene Paleoecology of an Estuary on Santa Rosa Island, California." Quaternary Research 41, no. 3 (May 1994): 326–35. http://dx.doi.org/10.1006/qres.1994.1037.

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AbstractThe middle to late Holocene history and early Anglo-European settlement impacts on Santa Rosa Island, California, were studied through the analysis of sediments in a small estuarine marsh. A 5.4-m-long sediment core produced a stratigraphic and pollen record spanning the last 5200 yr. Three major zones are distinguishable in the core. The lowermost zone (5200 to 3250 yr B.P.) represents a time of arid climate with predominantly marine sediment input and high Chenopodiaceae and Ambrosia pollen values. The intermediate zone (3250 yr B.P. to 1800 A.D.) is characterized by greater fresh water input and high values for Asteraceae and Cyperaceae pollen and charcoal particles. The uppermost zone (1800 A.D. to present) documents the unprecedented erosion, sedimentation, and vegetation change that resulted from the introduction of large exotic herbivores and exotic plants to the island during Anglo-European settlement. The identification of pollen grains of Torrey Pine (Pinus torreyana) documents the persistence of this endemic species on the island throughout the middle to late Holocene.

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46

Nasution, Dewi Sartika. "Peningkatan kapasitas manajemen usaha bagi pelaku usaha sektor industri UKM roti sebagai upaya peningkatan daya saing usaha menuju industri mandiri." TRANSFORMASI: Jurnal Pengabdian Masyarakat 14, no. 1 (June 30, 2018): 27–34. http://dx.doi.org/10.20414/transformasi.v14i1.572.

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[Bahasa]: Mayoritas masyarakat Babakan memiliki mata pencaharian sebagai pengusaha roti. Akan tetapi pengelolaan usaha roti masih sangat sederhana dan tidak dikelola dengan sistematis dan terencana dengan baik. Di sisi lain kunci utama keberhasilan dalam mengembangkan usaha adalah pada manajemen pengelolaan usaha. Kemampuan dalam manajemen usaha yang dimiliki produsen roti di Babakan tergolong kategori kurang. Mereka masih menjalankan usaha sebagai pekerjaan sampingan sebagai ibu rumah tangga. Mayoritas usaha roti belum memiliki ijin edar, kemasan roti yang digunakan masih sangat sederhana dan pemasaran juga masih dalam skala lokal atau hanya di pulau Lombok saja sedangkan potensi yang dimiliki para pengusaha roti sangat besar untuk dapat memasarkan rotinya hingga ke pulau lain. Pengabdian ini bertujuan untuk meningkatkan kemampuan manajemen usaha bagi para pelaku usaha industri kecil rumah tangga di kelurahan Babakan yang terdiri dari 25 produsen roti. Pelatihan dan pendampingan melibatkan dinas kesehatan, motivator dari area capacity to grow Bank BTPN, pemuka agama, dan UIN Mataram. Pelatihan dan pendampingan adalah berkaitan dengan cara pengurusan SPP-PIRT, manajemen keuangan usaha mikro, produk halal, dan cara berbisnis islami. Kata Kunci: UMKM, PIRT, keuangan UMKM, produk halal, produsen, bisnis islami [English]: The majority of the Babakan residents make a living as bread entrepreneurs. However, the management of bread business is still very simple and not managed systematically and well planned. On the other hand, the main key to success in developing a business is the ability of management. The ability in business management by bread producers in Babakan is categorized as low. They still run businesses as a side job. The majority of bread businesses do not yet have marketing licenses, bread packaging used is still very simple and marketing is also still on a local scale or only on the island of Lombok while the potential of bakers is very large to be able to market their bread to other islands. This community service program aims to improve business management ability for small-scale household industry in the Babakan sub-district consisting of 25 bread producers. Training and mentoring involved the health office, a motivator BTPN Banks, religious leaders, and UIN Mataram team. Training and mentoring are related to the way of arranging SPP-PIRT, micro business financial management, halal products, and ways of doing Islamic business. Keywords: UMKM, PIRT, UMKM finance, halal products, producers and Islamic businesses

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Luji, Daud Saleh. "EKSISTENSI DAN PEWARISAN BUDAYA TUKU DALAM MASYARAKAT PULAU NDAO (ORANG NDAO) KABUPATEN ROTE NDAO NTT." Paradigma: Jurnal Kajian Budaya 10, no. 3 (December 11, 2020): 311. http://dx.doi.org/10.17510/paradigma.v10i3.400.

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On Ndao Island, Ndao Nuse Subdistrict, Rote Ndao Regency, the people have two prominent skills and have become the livelihoods of the people on the island, namely weaving skills (manènnu) and craftsmen or silversmiths (tuku). The two skills of the above Ndao island community are passed on by parents with informal and non-formal education patterns, but the two cultures experience different developments. Manènnu culture is still developing today among women while tuku culture is almost extinct. To find out the existence and cause of near extinction of Tuku’s skills, this research was carried out with the formulation of the problem as follows: 1) how the existence of silver or tuku craftsmen on Ndao Island; 2) what is the cause of the almost endangered skill of silversmiths or tuku in Ndao Island; 3) how are the efforts of the people of Ndao Island to pass down the culture of silversmiths or tuku to young generation. This study aims: 1) to find out the existence of silver or tuku craftsmen on Ndao Island; 2) to find out the cause of the almost endangered skill of silversmiths or tuku in Ndao Island; 3) to know the efforts of the people of Ndao Island to pass down the culture of silversmiths or tuku to their young generation. The method used in this study is a qualitative research method with interview and observation techniques for data collection. From the results of data analysis it can be concluded the following matters: First, there is an effort of cultural inheritance in society but does not use the right pattern. Second, the lack of interest in the younger generation to learn tuku. Third, the existence of cultural assimilation is the inclusion of a new method of fishing that is using a large trawl boat with a large trawl type so that many young people from Ndao Island who do not want to learn tuku skills and prefer to be subordinates to lampara boats whose income is actually far below the skills of tuku. Besides that, there are many people who pursue seaweed cultivation, the Fourth. The more difficult the silver raw materials in the community. The fifth pattern of cultural inheritance is not done well and well organized.

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Raven, Arjan, Adriane B. Randolph, and Shelli Heil. "Creating Sustainable Education Projects In Roat, Honduras Through Continuous Process Improvement." Contemporary Issues in Education Research (CIER) 3, no. 1 (November 5, 2010): 31. http://dx.doi.org/10.19030/cier.v3i1.159.

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The investigators worked together with permanent residents of Roatán, Honduras on sustainable initiatives to help improve the island’s troubled educational programs. Our initiatives focused on increasing the number of students eligible and likely to attend a university. Using a methodology based in continuous process improvement, we developed tutoring programs, college preparation workshops, long-term plans for a local school, and solicited involvement by an island educational coalition. Lessons learned from these initiatives may be used to expand other efforts on the island and can be generalized to other programs in Central America.

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Hardiman, Mark, Andrew C. Scott, Nicholas Pinter, R. Scott Anderson, Ana Ejarque, Alice Carter-Champion, and Richard A. Staff. "Fire history on the California Channel Islands spanning human arrival in the Americas." Philosophical Transactions of the Royal Society B: Biological Sciences 371, no. 1696 (June 5, 2016): 20150167. http://dx.doi.org/10.1098/rstb.2015.0167.

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Recent studies have suggested that the first arrival of humans in the Americas during the end of the last Ice Age is associated with marked anthropogenic influences on landscape; in particular, with the use of fire which, would have given even small populations the ability to have broad impacts on the landscape. Understanding the impact of these early people is complicated by the dramatic changes in climate occurring with the shift from glacial to interglacial conditions. Despite these difficulties, we here attempt to test the extent of anthropogenic influence using the California Channel Islands as a smaller, landscape-scale test bed. These islands are famous for the discovery of the ‘Arlington Springs Man’, which are some of the earliest human remains in the Americas. A unifying sedimentary charcoal record is presented from Arlington Canyon, Santa Rosa Island, based on over 20 detailed sedimentary sections from eight key localities. Radiocarbon dating was based on thin, fragile, long fragments of charcoal in order to avoid the ‘inbuilt’ age problem. Radiocarbon dating of 49 such fragments has allowed inferences regarding the fire and landscape history of the Canyon ca 19–11 ka BP. A significant period of charcoal deposition is identified approximately 14–12.5 ka BP and bears remarkable closeness to an estimated age range of the first human arrival on the islands. This article is part of the themed issue ‘The interaction of fire and mankind’.

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Thys, Tierney M., Alex R. Hearn, Kevin C. Weng, John P. Ryan, and César Peñaherrera-Palma. "Satellite Tracking and Site Fidelity of Short Ocean Sunfish, Mola ramsayi, in the Galapagos Islands." Journal of Marine Biology 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/7097965.

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Ocean sunfishes, with their peculiar morphology, large size, and surface habits, are valuable assets in ecotourism destinations worldwide. This study investigates site fidelity and long-range movements of short ocean sunfish, Mola ramsayi (Giglioli 1883), at Punta Vicente Roca (PVR) off Isabela Island in the Galapagos Islands. Five individuals were tracked between 32 and 733 days using ultrasonic receivers and transmitters. Two of the 5 were also tracked with towed pop-off satellite tags. One travelled to the equatorial front covering 2700 km in 53 days, with dive depths in the upper 360 m at temperatures between 9.2°C and 22°C. During its westward travel, dives extended to 1112 m (the deepest depth yet recorded for Molidae) into temperatures ranging between 4.5°C and 23.2°C. The remaining four individuals demonstrated site fidelity to PVR and were detected at the site between 128–1361 times for a total of 3557 reports. Forty-eight percent of the reports occurred during daytime hours and 52% after dark. Presumed cleaning session durations had a median of 15 minutes and a maximum of nearly 100 minutes. No other ultrasonic arrays around Galapagos or in the Eastern Pacific regional network recorded the presence of tagged individuals. These data are combined with tourist vessel sightings and submersible observations to confirm Punta Vicente Roca as an important sunfish hotspot.

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Journal articles on the topic 'Rota Island'

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