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Journal articles on the topic 'Habitat units'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Stegmayr, Birgitta, Kjell Asplund, Kerstin Hulter-Åsberg, et al. "Stroke Units in Their Natural Habitat." Stroke 30, no. 4 (1999): 709–14. http://dx.doi.org/10.1161/01.str.30.4.709.

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2

Seenan, Pamela, Marita Long, and Peter Langhorne. "Stroke Units in Their Natural Habitat." Stroke 38, no. 6 (2007): 1886–92. http://dx.doi.org/10.1161/strokeaha.106.480871.

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3

Schwartz, John S., and Edwin E. Herricks. "Fish use of stage-specific fluvial habitats as refuge patches during a flood in a low-gradient Illinois stream." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 7 (2005): 1540–52. http://dx.doi.org/10.1139/f05-060.

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A stage-specific habitat classification scheme was developed emphasizing the ecological importance of habitat space as flow refugia for fish. Habitat units were based on planform and channel morphology and the resulting three-dimensional hydraulic patterns that form during floods. Fish were sampled in specific habitat patches using prepositioned areal electrofishing devices at two high-flow stages, near bankfull flow and one-half bankfull flow, during a flood. Fish were also sampled at baseflow immediately following the flood to compare changes in habitat use related to flow stage. During the

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4

Gómez-Pazo, Alejandro, Augusto Pérez-Alberti, Pedro Fraga-Santiago, Martin Souto-Souto, and X. L. Otero. "Contribution of GIS and Geochemical Proxies to Improving Habitat Identification and Delimitation for the Natura 2000 Network: The Case of Coastal Lagoons in Galicia (NW Iberian Peninsula)." Applied Sciences 10, no. 24 (2020): 9068. http://dx.doi.org/10.3390/app10249068.

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The Natura 2000 network is an ambitious European project aimed at nature conservation. Nevertheless, the identification and delimitation of habitats is a complex task and simultaneously essential for correct ecosystem management. In this study we compared the current habitat delimitation and designation and the results produced by Geographic Information Systems (GIS) and geochemical proxies for the categorization of four coastal lakes in Galicia (NW Iberian Peninsula). The findings reveal important errors in the delimitation/designation. The first error is the designation of all four lakes as

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5

Brind'Amour, Anik, and Daniel Boisclair. "Effect of the spatial arrangement of habitat patches on the development of fish habitat models in the littoral zone of a Canadian Shield lake." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 4 (2006): 737–53. http://dx.doi.org/10.1139/f05-249.

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We developed fish habitat models in a Canadian Shield lake using (i) a sampling-site approach based on analytical units having a surface area equal to that of sampling sites (S ~ 200 m2), (ii) a constant-multiple approach in which the analytical units constituted grouping of adjacent sampling sites in units of increasing sizes (e.g., 2S or 3S), and (iii) a habitat-patch approach in which only contiguous sampling sites with similar environmental characteristics were merged. The best models explaining within-lake variations in fish density, biomass, and community structure on the littoral zone w

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Kocik, John F., and C. Paola Ferreri. "Juvenile production variation in salmonids: population dynamics, habitat, and the role of spatial relationships." Canadian Journal of Fisheries and Aquatic Sciences 55, S1 (1998): 191–200. http://dx.doi.org/10.1139/d98-015.

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Anadromous Atlantic salmon (Salmo salar) exhibit a complex life history that requires the use of habitats that span several different temporal and spatial scales. While fisheries scientists have investigated the various elements of habitat and how they affect Atlantic salmon growth and survival, these studies typically focus on requisite requirements for a single life history stage. Current advances in our understanding of salmonid populations in lotic systems indicates that ignoring the spatial positioning of different habitats and dispersal capabilities of fish between them may affect estima

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7

Koroleva, Natalia. "Phytosociological evaluation of terrestrial habitat types in Pyramiden area (Svalbard, Norway)." Czech Polar Reports 4, no. 2 (2014): 193–211. http://dx.doi.org/10.5817/cpr2014-2-20.

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Natural habitats in the area of Pyramiden town (Svalbard, Norway) were assessed as a part of landscape planning for purposes of tourism development. Habitat types evalu-ation was done by using phytosociological units and assessed by IUCN categories. Altogether, 15 main habitat types were united in following groups: 1. Arctic tundra, 2. Barrens, screes, young alluvia areas and glaciers, 4. Wetlands and marshes, 5. Meadows and grasslands, 6. Anthropogenic open plant communities.

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8

Woinarski, JCZ, and RW Braithwaite. "The distributionof terrestrial vertebrates and plants in relation to vegetation and habitat-mapping schemes in Stage III of Kakadu National Park." Wildlife Research 20, no. 3 (1993): 355. http://dx.doi.org/10.1071/wr9930355.

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The abundance of birds, reptiles and frogs was recorded at 370 quadrats and the abundance of mammals and the basal area of woody plants was recorded at these and a further 10 quadrats in Stage I11 of Kakadu National Park. Patterns in the distribution of these species were related to two environmental mapping schemes. The more specific and localised of these was a 1 : 100 000 habitat map for Kakadu National Park, established by Schodde et al. (1987), based on environmental attributes considered to be significant for the distribution of wildlife species: floristics, vegetation structure, substra

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9

Angermeier, Paul L., and Roy A. Smogor. "Estimating number of species and relative abundances in stream-fish communities: effects of sampling effort and discontinuous spatial distributions." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 5 (1995): 936–49. http://dx.doi.org/10.1139/f95-093.

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We sampled fishes and measured microhabitat in series of contiguous habitat units (riffles, runs, pools) in three Virginia streams. We used Monte Carlo simulations to construct hypothetical series of habitat units, then examined how number of species, similarity in relative abundances, and number of microhabitats accumulated with increasing number of habitat units (i.e., sampling effort). Proportions of all species and microhabitats represented were relatively low and variable at low sampling effort, but increased asymptotically and became less variable with greater sampling effort. To facilit

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10

Hankin, David G., and Gordon H. Reeves. "Estimating Total Fish Abundance and Total Habitat Area in Small Streams Based on Visual Estimation Methods." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 5 (1988): 834–44. http://dx.doi.org/10.1139/f88-101.

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We present sampling designs for estimating total areas of habitat types and total fish numbers in small streams. Designs are applied independently within strata constructed on the basis of habitat unit type and stream reach. Visual methods for estimating habitat areas and fish numbers are used to increase sample sizes and thereby reduce errors of estimation. Visual estimates of area are made for all habitat units, and visual estimates of fish numbers are made for systematic samples of units within given habitat types. Use of systematic sampling circumvents the requirement for a preexisting map

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11

Orlowski, Andrzej. "Acoustic Transects as Units for Classifying the Benthic Habitat." Acta Acustica united with Acustica 95, no. 4 (2009): 620–27. http://dx.doi.org/10.3813/aaa.918190.

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12

Smallwood, K. Shawn. "Linking Habitat Restoration to Meaningful Units of Animal Demography." Restoration Ecology 9, no. 3 (2001): 253–61. http://dx.doi.org/10.1046/j.1526-100x.2001.009003253.x.

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13

Gaillard, Jean-Michel, Mark Hebblewhite, Anne Loison, et al. "Habitat–performance relationships: finding the right metric at a given spatial scale." Philosophical Transactions of the Royal Society B: Biological Sciences 365, no. 1550 (2010): 2255–65. http://dx.doi.org/10.1098/rstb.2010.0085.

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The field of habitat ecology has been muddled by imprecise terminology regarding what constitutes habitat, and how importance is measured through use, selection, avoidance and other bio-statistical terminology. Added to the confusion is the idea that habitat is scale-specific. Despite these conceptual difficulties, ecologists have made advances in understanding ‘how habitats are important to animals’, and data from animal-borne global positioning system (GPS) units have the potential to help this clarification. Here, we propose a new conceptual framework to connect habitats with measures of an

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14

Muething, KA, F. Tomas, G. Waldbusser, and BR Dumbauld. "On the edge: assessing fish habitat use across the boundary between Pacific oyster aquaculture and eelgrass in Willapa Bay, Washington, USA." Aquaculture Environment Interactions 12 (December 3, 2020): 541–57. http://dx.doi.org/10.3354/aei00381.

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Estuaries are subject to diverse anthropogenic stressors, such as shellfish aquaculture, which involve extensive use of estuarine tidelands. Pacific oyster Crassostrea gigas aquaculture is a century-old practice in US West Coast estuaries that contributes significantly to the regional culture and economy. Native eelgrass Zostera marina also commonly occurs in intertidal areas where oyster aquaculture is practiced. Eelgrass is federally protected in the USA as ‘essential fish habitat’, restricting aquaculture activities within or near eelgrass. To contribute scientific information useful for ma

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15

Sarika, Maria A., Anastasia N. Christopoulou, Sevasti D. Zervou, and Andreas C. Zikos. "Vegetation units of wetland and terrestrial habitats: the case study of Spercheios River and Maliakos Gulf (Sterea Ellas, Greece), a Natura 2000 Site." Hacquetia 17, no. 2 (2018): 189–220. http://dx.doi.org/10.1515/hacq-2017-0017.

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Abstract The vegetation of the European Natura 2000 protected area of Spercheios river and Maliakos gulf, that includes Mediterranean sclerophyllous shrublands, as well as riverine and coastal habitats, was studied during 2000 and 2014–2015. The vegetation was analysed following the Braun-Blanquet method. Twenty six plant communities were recorded, one of which (Pistacio terebinthi-Quercetum cocciferae) described for the first time. The communities belong to fifteen alliances, fourteen orders and eleven phytosociological classes. The distinguished vegetation units are described, presented in p

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16

Sebastian, Jis, Durairaj Kathiresan, and Giby Kuriakose. "Species diversity and abundance patterns of epiphytic orchids in Aralam Wildlife Sanctuary in Kerala, India." Journal of Threatened Taxa 13, no. 8 (2021): 19060–69. http://dx.doi.org/10.11609/jott.4852.13.8.19060-19069.

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Species diversity and abundance patterns of epiphytic orchids were studied in Aralam Wildlife Sanctuary, in the Western Ghats of northern Kerala. Habitats sampled were wet evergreen (EVEG), montane wet evergreen (MEVG), moist deciduous (MDEC), and semi evergreen (SEVG), on a gradient of altitude from 60 to 1,589 m. Selective tree scanning on linear line transects was deployed (n= 40) across spatial units. A total of 39 orchid species were recorded. Rarefied species richness was maximum in the EVEG (20) habitat. Best suited rank abundance models were analysed for epiphytic orchids in each habit

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17

Bezuidenhout, H. "Plantegroeiklassifikasie van die A-landtipe van die Mooirivier - opvanggebied, Transvaal." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 10, no. 1 (1991): 4–10. http://dx.doi.org/10.4102/satnt.v10i1.478.

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The aim of this study was to identify, characterize and interpret ecologically, by using habitat characteristics, the major vegetation units and their variations of the A land type. Five plant communities were successfully distinguished by applying a numerical classification and Braun-Blanquet procedures. The plant communities could easily be correlated with specific habitat types. A clear distinction could be made between plant communities of the upland and lowland areas. Vegetation gradients and associated gradients in habitat were identified by using an ordination technique. The study emph

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18

Bezuidenhout, H. "Die plantgemeenskappe van die Ba-landtipe in die Mooirivieropvanggebied, Transvaal." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 10, no. 2 (1991): 85–92. http://dx.doi.org/10.4102/satnt.v10i2.494.

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The aim of this study was to identify, characterize and interpret ecologically, by using habitat characteristics, the major vegetation units and their variations of the Ba land type. Six plant communities were successfully distinguished through applying a numerical classification (TWINSPAN) and Braun-Blanquet procedures. The plant communities could easily be correlated with specific habitat types. A clear distinction could be made between plant communities of the upland and lowland areas. Vegetation gradients and associated gradients in habitat were identified by using an ordination technique

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19

Melo, D. H. A., B. K. C. Filgueiras, C. A. Iserhard, L. Iannuzzi, A. V. L. Freitas, and I. R. Leal. "Effect of habitat loss and fragmentation on fruit-feeding butterflies in the Brazilian Atlantic Forest." Canadian Journal of Zoology 97, no. 7 (2019): 588–96. http://dx.doi.org/10.1139/cjz-2018-0202.

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Habitat loss and fragmentation have drastically altered the availability and quality of tropical forest habitats, but information on how such changes influence local biodiversity is still insufficient. Here, we examine the effects of both patch and landscape metrics on fruit-feeding butterfly assemblages in a fragmented landscape of the Brazilian Atlantic Forest. Our study was carried out in three habitat types: eight fragments (ranging from 8 to 126 ha), eight areas of forest edge (50 m from forest border), and eight areas of forest interior (>200 m from forest border) of the largest remna

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20

Dauwalter, Daniel C., Dale K. Splinter, William L. Fisher, and Richard A. Marston. "Geomorphology and stream habitat relationships with smallmouth bass (Micropterus dolomieu) abundance at multiple spatial scales in eastern Oklahoma." Canadian Journal of Fisheries and Aquatic Sciences 64, no. 8 (2007): 1116–29. http://dx.doi.org/10.1139/f07-085.

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Fluvial geomorphic processes structure habitats important to stream fishes. We determined relationships between densities of smallmouth bass (Micropterus dolomieu) and ecoregions, watershed and reach morphology, and stream habitat in eastern Oklahoma, USA. Watershed and reach morphology were measured at 128 stream sites, and stream habitat and smallmouth bass abundance were measured in 1800 channel units. Variation in stream size, channel morphology, and substrate size constituted major physical differences among sites. Channel morphology differed among ecoregions in the largest streams. Densi

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21

Guertault, Lucie, Garey Fox, and Shannon Brewer. "Geomorphic identification of physical habitat features in a large, altered river system." E3S Web of Conferences 40 (2018): 02031. http://dx.doi.org/10.1051/e3sconf/20184002031.

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Altered flow regimes in streams can significantly affect ecosystems and disturb ecological processes, leading to species loss and extinction. Many river management projects use stream classification and habitat assessment approaches to design practical solutions to reverse or mitigate adverse effects of flow regime alteration on stream systems. The objective of this study was to develop a methodology to provide a primary identification of physical habitats in an 80-km long segment of the Canadian River in central Oklahoma. The methodology relied on basic geomorphic variables describing the str

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22

Portugal, Marina Peres, Ronaldo Gonçalves Morato, Katia Maria Paschoaletto Micchi de Barros Ferraz, Flávio Henrique Guimarães Rodrigues, and Claudia Maria Jacobi. "Priority areas for jaguar Panthera onca conservation in the Cerrado." Oryx 54, no. 6 (2019): 854–65. http://dx.doi.org/10.1017/s0030605318000972.

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AbstractThe jaguar Panthera onca, a threatened species in Brazil, is losing suitable habitat as a result of agricultural expansion and other forms of land conversion, especially in the Cerrado biome. In the current context of habitat loss and fragmentation, a network of protected areas is paramount for the conservation of this species. We aimed to identify jaguar conservation units in the Cerrado, and propose a ranking of priority areas for the species in this region. We used the maximum entropy algorithm to model habitat suitability for the jaguar in the Cerrado, with nine uncorrelated enviro

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23

Liccari, Francesco, Miris Castello, Livio Poldini, et al. "Do Habitats Show a Different Invasibility Pattern by Alien Plant Species? A Test on a Wetland Protected Area." Diversity 12, no. 7 (2020): 267. http://dx.doi.org/10.3390/d12070267.

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Biological invasions are deemed to be the second most important global driver of biodiversity loss, right behind habitat destruction and fragmentation. In this study, we aimed at testing if community invasibility, defined as the vulnerability to invasion of a community, could be associated with the characteristics of a given habitat, as described by the composition and structure of its native species. Based on a probabilistic sampling of the alien flora occurring in the temperate wetland Lake Doberdò (Friuli Venezia Giulia region, NE Italy) and using a null-model-based approach, the observed o

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24

Pawar, Devavrat, Howard P. Nelson, Divya R. L. Pawar, and Sarika Khanwilkar. "Estimating Leopard Panthera pardus fusca (Mammalia: Carnivora: Felidae) abundance in Kuno Wildlife Sanctuary, Madhya Pradesh, India." Journal of Threatened Taxa 11, no. 5 (2019): 13531–44. http://dx.doi.org/10.11609/jott.4774.11.5.13531-13544.

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Reliable population estimate of apex predators, such as the Leopard Panthera pardus fusca, is important as they indicate ecosystem health, enable evaluation of the effectiveness of conservation efforts and provide a benchmark for future management decisions. The present study is the first to estimate abundance of Leopard along with possible prey profile in Kuno Wildlife Sanctuary (KWLS), in central Madhya Pradesh (M.P.), India. For systematic sampling, two study habitats, 15km² each, were identified, one close to the park entrance and the other away from the park entrance. Sampling was carried

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Zhang, Hong-Xiang, Qian Wang, and Su-Wen Jia. "Genomic Phylogeography of Gymnocarpos przewalskii (Caryophyllaceae): Insights into Habitat Fragmentation in Arid Northwestern China." Diversity 12, no. 9 (2020): 335. http://dx.doi.org/10.3390/d12090335.

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Extensive range of deserts and gobis (rocks) had promoted habitat fragmentation of species in arid northwestern China. Distribution of endangered Gymnocarpos przewalskii Maxim. covers most of gobis (rocks) and desert terrain across arid regions of northwestern China. In the present study, we had employed genomic phylogeographical analysis to investigate population structure of G. przewalskii and test the effect of environmental conditions on spatial pattern of genetic diversity. Results showed four groups were identified from east to west: Edge of the Alxa Desert, Hexi Corridor, Hami Basin, an

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Cochrane, Madaline, Donald Brown, and Ron Moen. "GPS Technology for Semi-Aquatic Turtle Research." Diversity 11, no. 3 (2019): 34. http://dx.doi.org/10.3390/d11030034.

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Global positioning system (GPS) telemetry units are now small enough to be deployed on terrestrial and semi-aquatic turtles. Many of these GPS units use snapshot technology which collects raw satellite and timestamp data during brief periods of data recording to minimize size. We evaluated locations from snapshot GPS units in stationary tests and on wood turtles (Glyptemys insculpta) in northeastern Minnesota. Stationary GPS units were placed in wood turtle habitat to evaluate location accuracy, fix success rate, and directional bias. The GPS fix success rate and accuracy were reduced in close

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27

Tian, Wen-Miin. "Side-scan sonar techniques for the characterization of physical properties of artificial benthic habitats." Brazilian Journal of Oceanography 59, spe1 (2011): 77–90. http://dx.doi.org/10.1590/s1679-87592011000500010.

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Side-scan sonar observations conducted at Mito artificial habitat site in the southwest coast off Taiwan, documented the locations of both concrete cubic blocks (more than 10,000 units) and scrapped steel boats (39 units) deployed previously. Based on their geographic locations, the concrete cubic artificial reefs could be grouped into 14 reef sets. About 30% of the reefs were deployed out of the promulgated site area. For the purpose of artificial habitat site identification and fishery resources management, a database structure was designed to accommodate types and positions of reefs, inform

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Gallant, Daniel, Lisa Léger, Éric Tremblay, Dominique Berteaux, Nicolas Lecomte, and Liette Vasseur. "Linking time budgets to habitat quality suggests that beavers (Castor canadensis) are energy maximizers." Canadian Journal of Zoology 94, no. 10 (2016): 671–76. http://dx.doi.org/10.1139/cjz-2016-0016.

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According to optimal foraging theory, consumers make choices that maximize their net energy intake per unit of time. We used foraging theory as a framework to understand the foraging behaviour of North American beavers (Castor canadensis Kuhl, 1820), an important herbivore that engineers new habitats. We tested the hypothesis that beavers are energy maximizers by verifying the prediction that they allocate time to foraging activities independently of habitat quality in Kouchibouguac National Park of Canada in New Brunswick, where nearly five decades of unabated colonization by beavers led to f

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29

Mikula, Karol, Mária Šibíková, Martin Ambroz, et al. "NaturaSat—A Software Tool for Identification, Monitoring and Evaluation of Habitats by Remote Sensing Techniques." Remote Sensing 13, no. 17 (2021): 3381. http://dx.doi.org/10.3390/rs13173381.

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The NaturaSat software integrates various image processing techniques together with vegetation data, into one multipurpose tool that is designed for performing facilities for all requirements of habitat exploration, all in one place. It provides direct access to multispectral Sentinel-2 data provided by the European Space Agency. It supports using these data with various vegetation databases, in a user-friendly environment, for, e.g., vegetation scientists, fieldwork experts, and nature conservationists. The presented study introduces the NaturaSat software, describes new powerful tools, such

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30

Sydeman, William J., Marcel Güntert, and Russell P. Balda. "Annual Reproductive Yield in the Cooperative Pygmy Nuthatch (Sitta pygmaea)." Auk 105, no. 1 (1988): 70–77. http://dx.doi.org/10.1093/auk/105.1.70.

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Abstract We studied cooperative-breeding Pygmy Nuthatches (Sitta pygmaea) for 4 yr in northern Arizona. Breeding units contained 2-5 birds. Helpers were found at about 30% of all nests. All helpers that later bred on the study area were male. Helpers were mostly yearlings, and offspring or siblings of the birds that they aided, but often aided at least one unrelated breeder. Breeding units with helpers produced significantly more young than those without helpers. Breeding units in habitats with the greatest floral diversity and structural maturity fledged significantly more young than those in

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31

Haas, C., and Gar Workman. "An Analysis of Composition, Distribution, and Habitat Use of Reintroduced Desert Bighorn Sheep in Arches National Park, Utah." UW National Parks Service Research Station Annual Reports 13 (January 1, 1989): 5–6. http://dx.doi.org/10.13001/uwnpsrc.1989.2763.

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The ecology of a reintroduced population of desert bighorn sheep (Ovis canadensis nelsoni} is being investigated in Arches National Park. National Park Service objectives are: (1) determine general ecological parameters, including population and social dynamics, seasonal distribution and habitat use patterns, and general health characteristics; and (2) develop a comprehensive program of habitat analysis and evaluation that can be used to determine habitat suitability and identify transplant sites in other National Park Service units.

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32

Kozłowska, Anna Barbara. "Potential natural vegetation as a basis of evaluation of the agricultural production conditions." Acta Agrobotanica 39, no. 1 (2013): 165–78. http://dx.doi.org/10.5586/aa.1986.014.

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Bioindicative value of potential natural vegetation was used in aim to evaluate conditions of agricultural production. Two maps from the south-east Poland in a scale 1 : 300 000 were compared. These were: the map of potential natural vegetation and the map of land capability units. Statisticaly significant correlation was found between phenomena presented on each of the maps. The unit of each of the maps was characterized in terms of the second map unit. Ecological amplitudes of the units of two typologies were determined. Legend symbols of both of the maps could be arranged in a consequent se

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Biers, Erin J., Shulei Sun, and Erinn C. Howard. "Prokaryotic Genomes and Diversity in Surface Ocean Waters: Interrogating the Global Ocean Sampling Metagenome." Applied and Environmental Microbiology 75, no. 7 (2009): 2221–29. http://dx.doi.org/10.1128/aem.02118-08.

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ABSTRACT The Sorcerer II Global Ocean Sampling (GOS) sequencing effort has vastly expanded the landscape of metagenomics, providing an opportunity to study the genetic potential of surface ocean water bacterioplankton on a global scale. Here we describe the habitat-based microbial diversity, both taxon evenness and taxon richness, for each GOS site and estimate genome characteristics of a typical free-living, surface ocean water bacterium. While Alphaproteobacteria and particularly SAR11 dominate the 0.1- to 0.8-μm size fraction of surface ocean water bacteria (43% and 31%, respectively), the

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34

Dutta, S., and Y. Jhala. "Devil is in the detail: behaviorally explicit habitat selection by the Critically Endangered great Indian bustard." Endangered Species Research 45 (May 27, 2021): 55–69. http://dx.doi.org/10.3354/esr01126.

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Habitat management to accommodate ecological needs of threatened species can help abate biodiversity decline. Some species require contrasting microhabitats for different functions, and may prefer patches with ample, diverse microhabitats. We examined this problem for the Critically Endangered great Indian bustard Ardeotis nigriceps in 175 km2 breeding habitat in Kachchh, India. We developed behaviorally explicit resource selection functions (RSFs) by comparing used vs. available microhabitats using binomial generalized linear models that tested hypothesized habitat responses in an information

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35

Bowman, Jeff, and Jean-François Robitaille. "An assessment of expert-based marten habitat models used for forest management in Ontario." Forestry Chronicle 81, no. 6 (2005): 801–7. http://dx.doi.org/10.5558/tfc81801-6.

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We used marten snow tracking data and a previously developed empirical habitat model from northeastern Ontario to validate a number of expert-based, non-spatial marten habitat models. In particular, we tested the non-spatial Ontario Wildlife Habitat Analysis Model, the Boreal East Habitat Suitability Matrix (including tests of both standard forest units and development stages), and Allen's (1982) HSI model. Marten habitat use as measured by tracks in the snow was consistent with predictions of all the expert-based models, suggesting that these models correctly characterized the stand-level for

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Gentry, Dale J., and Kerri T. Vierling. "Old Burns as Source Habitats for Lewis's Woodpeckers Breeding in the Black Hills of South Dakota." Condor 109, no. 1 (2007): 122–31. http://dx.doi.org/10.1093/condor/109.1.122.

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Abstract Abstract Crown-burned pine forests are an important breeding habitat for many cavity-nesting birds, and can serve as a source habitat for some woodpecker species. However, it is unclear if this function continues with postburn succession as predators recolonize burned habitats and snag density declines. Lewis's Woodpeckers (Melanerpes lewis) are considered “burn specialists” and are a species of conservation concern. We monitored Lewis's Woodpeckers nesting in ponderosa pine (Pinus ponderosa) forests to determine the source or sink function of old-burn habitats in the Black Hills of S

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Veresoglou, Stavros D., Leonie Grünfeld, and Magkdi Mola. "Micro-Landscape Dependent Changes in Arbuscular Mycorrhizal Fungal Community Structure." Applied Sciences 11, no. 11 (2021): 5297. http://dx.doi.org/10.3390/app11115297.

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The roots of most plants host diverse assemblages of arbuscular mycorrhizal fungi (AMF), which benefit the plant hosts in diverse ways. Even though we understand that such AMF assemblages are non-random, we do not fully appreciate whether and how environmental settings can make them more or less predictable in time and space. Here we present results from three controlled experiments, where we manipulated two environmental parameters, habitat connectance and habitat quality, to address the degree to which plant roots in archipelagos of high connectance and invariable habitats are colonized with

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Holland, Daniel S., and Kurt E. Schnier. "Protecting marine biodiversity: a comparison of individual habitat quotas and marine protected areas." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 7 (2006): 1481–95. http://dx.doi.org/10.1139/f06-049.

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Fisheries managers in the United States are required to identify and mitigate the adverse impacts of fishing activity on essential fish habitat (EFH). There are additional concerns that the viability of sessile noncommercial species, animals that are habitat dependent and (or) are themselves constituents of fishery habitat, may be threatened by fishing activities. We propose a system of individual habitat quotas (IHQ) to achieve habitat conservation and species protection cost effectively. Individual quotas of habitat impact units would be distributed to fishers with an aggregate quota set to

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Kahler, Thomas H., Philip Roni, and Thomas P. Quinn. "Summer movement and growth of juvenile anadromous salmonids in small western Washington streams." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 10 (2001): 1947–56. http://dx.doi.org/10.1139/f01-134.

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Movements of juvenile coho salmon (Oncorhynchus kisutch), cutthroat trout (Oncorhynchus clarki clarki), and steelhead trout (Oncorhynchus mykiss) were studied by observations and recapture of marked individuals in three western Washington streams to test the hypotheses that few fish would move, downstream movement would predominate, movers would be initially smaller and grow slower after movement than residents, and habitat quality would influence movement. Contrary to predictions, from 28 to 60% of marked fish moved at least one habitat unit, and immigration of unmarked fish also indicated co

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Rocha, CFD, HG Bergallo, M. Van Sluys, MAS Alves, and CE Jamel. "The remnants of restinga habitats in the brazilian Atlantic Forest of Rio de Janeiro state, Brazil: habitat loss and risk of disappearance." Brazilian Journal of Biology 67, no. 2 (2007): 263–73. http://dx.doi.org/10.1590/s1519-69842007000200011.

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"Restingas" (herbaceous/shrubby coastal sand-dune habitats) used to cover most of Rio de Janeiro State coast, and have suffered extensive degradation over the last five centuries. Using satellite images and field work, we identified the remaining restingas in the State, recording the factors that might cause their degradation. We used two mosaics of Landsat 7 scenes (spatial resolution 15 and 30 m) to map and evaluate preliminarly the remaining areas and conservation status. Each remnant area was checked in the field, degraded areas within it were mapped and subtracted from the remnants. We id

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Kusbach, Antonín, James N. Long, Helga Van Miegroet, and Leila M. Shultz. "Fidelity and diagnostic species concepts in vegetation classification in the Rocky Mountains, northern Utah, USA." Botany 90, no. 8 (2012): 678–93. http://dx.doi.org/10.1139/b2012-033.

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The concepts of diagnostic species and fidelity have been used frequently in European phytosociology but rarely in North American vegetation classification. We developed a classification of the vegetation of a mountainous area of northern Utah and compared the diagnostic species approach with the indicator-species approach of habitat type classification sensu Daubenmire prevailing in the U.S. Interior West. A total of 157 forest and nonforested plots were described by vascular plants and basic environmental factors. Clustering with RandomForest classification and ordination reduced the origina

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Mlynarek, Julia J., Wayne Knee, Bruce P. Smith, and Mark R. Forbes. "Regionally widespread parasitic water mites have relatively broad host-species ranges." Canadian Journal of Zoology 93, no. 10 (2015): 741–46. http://dx.doi.org/10.1139/cjz-2015-0077.

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Certain parasite species have free-living stages, so habitat range may influence host-species range. We tested whether regional occurrence and habitat use of parasitic water mites were related to their host-species range. We collected 7445 Arrenurus Dugès, 1834 mites from 7107 coenagrionid damselflies, representing 11 host species from 13 sites in southeastern Ontario and southwestern Quebec. Because larval water mites are difficult to identify morphologically to species, we chose to amplify the barcode fragment of cytochrome oxidase subunit I to explore host-species ranges. Fifteen operationa

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Wrona, Frederick J., Peter Calow, Ian Ford, Donald J. Baird, and Lorraine Maltby. "Estimating the Abundance of Stone-dwelling Organisms: A New Method." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 10 (1986): 2025–35. http://dx.doi.org/10.1139/f86-248.

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A system of stratified sampling has been developed which allows the estimation of population densities of organisms which adhere to, or are associated with, stones in both lentic and lotic habitats, using the stones themselves as the primary sampling units. Knowing the stone profile of the habitat (i.e. the mean count, relative frequency, or mean surface area of the stones occurring within a size class), and using the appropriate statistical equations, an estimate of the mean number of individuals occurring within a predefined stone size class can be obtained along with its associated error es

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Chapman, MG, AJ Underwood, and D. Blockley. "Effects of method of deployment of artificial units of habitat on microgastropod colonization." Marine Ecology Progress Series 366 (August 29, 2008): 49–57. http://dx.doi.org/10.3354/meps07585.

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Jackson, L., J. Levine, and E. Hilborn. "A comparison of analysis units for associating Lyme disease with forest-edge habitat." Community Ecology 7, no. 2 (2006): 189–97. http://dx.doi.org/10.1556/comec.7.2006.2.6.

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Gorbunov, R. V., Yu V. Plugatar, V. O. Smirnov, et al. "Spatial interrelation between biodiversity and habitat types on the territory of the Crimean Peninsula." Bulletin of the State Nikitsky Botanical Gardens, no. 133 (December 18, 2019): 224–40. http://dx.doi.org/10.36305/0513-1634-2019-133-224-240.

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The article presents the study results of the interrelation of diversity of habitat types (locations types) and indicators of biological diversity at the local spatial level (operational-territorial units are specially protected natural reservations). The work is based on data on 58 specially protected natural reservations for which there is information on biological diversity. On the basis of remote sensing data, those are published and archive materials for each specially protected natural reservations, cartographic models of habitat types and a geoinformation database on their biological di

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Mercante, MA, SC Rodrigues, and JLS Ross. "Geomorphology and habitat diversity in the Pantanal." Brazilian Journal of Biology 71, no. 1 suppl 1 (2011): 233–40. http://dx.doi.org/10.1590/s1519-69842011000200002.

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The present study deals with the inter-relations in the relief which forms the Bacia do Alto Rio Paraguay (BAP) in mid-west Brazil. The overall aim is to discuss the relationship between relief forms and the biodiversity of the Pantanal. The BAP is a natural environmental system with contrasts in two of the compartments on which it is formed: the plateau, the most elevated compartment, highly transformed by human activities, and the plain which forms the Pantanal, which is more preserved and less transformed in relation to productive activities. The analysis was performed based on publications

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Crête, Michel. "Forestry Practices in Québec and Ontario in Relation to Moose Population Dynamics." Forestry Chronicle 64, no. 3 (1988): 246–50. http://dx.doi.org/10.5558/tfc64246-3.

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Abundant forage, particularly twigs of deciduous species, represents the key element of K carrying capacity for moose. Forest fires previously created such quality habitat, while timber harvest should now play a comparable role. Management units for moose habitat should cover 40-50 km2. Hunting and predation represent the regulating factors of most moose populations in Québec and Ontario, so that habitat is only lightly used. This situation poses difficulties in evaluating the role played by forestry practices on population dynamics; however the logging of a new area, which creates accessibili

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Winkler, Kathrin A., Steven Weiss, Barbara Pamminger-Lahnsteiner, and Josef Wanzenböck. "Multiple stocks of whitefish (Coregonus lavaretus (L.) complex) in the pre-alpine lake Traunsee: recommendations for habitat-specific conservation units." Advances in Limnology 64 (October 30, 2013): 289–301. http://dx.doi.org/10.1127/1612-166x/2013/0064-0028.

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França, FGR, and AFB Araújo. "Are there co-occurrence patterns that structure snake communities in Central Brazil?" Brazilian Journal of Biology 67, no. 1 (2007): 33–40. http://dx.doi.org/10.1590/s1519-69842007000100005.

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The main factors that structure Neotropical animal communities have been the subject of discussion in ecology communities. We used a set of null models to investigate the existence of structure in snake communities from the Cerrado in Central Brazil in relation to the co-occurrence of species and guilds concerning specific resources. We used fragments (conservation units) inside the Distrito Federal and neighbor municipalities. In spite of recent human colonization in the region from the end of the 1950’s, intense habitat modification and fragmentation has taken place. Sixty three snake specie

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