Relevant bibliographies by topics / Microhabitat

Academic literature on the topic 'Microhabitat'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Microhabitat"

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Ohlson, Mikael, and Olle Zackrisson. "Tree establishment and microhabitat relationships in north Swedish peatlands." Canadian Journal of Forest Research 22, no. 12 (December 1, 1992): 1869–77. http://dx.doi.org/10.1139/x92-244.

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We sowed seeds of Pinussylvestris L., Pinuscontorta Dougl, Piceaabies (L.) Karst., and Piceamariana (Mill.) B.S.P. at five different virgin peatland sites in northern Sweden. Seeds were sown in 1987, 1988, 1989, and 1990. The seeds were sown in three different types of microhabitat, viz Pleurozium, Sphagnumfuscum, and Sphagnumangustifolium. Germination and seedling mortality were monitored each year. Both germination and mortality were significantly affected by the micro-habitat. Sphagnumangustifolium microhabitats were most favourable and Pleurozium microhabitats were least favourable for germination of all tree species. In contrast, the mortality for all tree species was highest in Sphagnumangustifolium microhabitats and lowest in Pleurozium microhabitats. Lowest average mortality was found among the nonindigenous Pinuscontorta and Piceamariana. The coniferous tree species had a species-specific relationship with the microhabitat. Pinussylvestris seeds were the most able to germinate in the Pleurozium microhabitats, and seedling mortality was strongly affected by the microhabitat. Piceaabies was the least affected by the microhabitat, and seedling mortality was high irrespective of microhabitat.
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SKUJA, AGNIJA. "Microhabitat preference of caddisfly (Trichoptera) communities in a medium-sized lowland stream in Latvia." Zoosymposia 5, no. 1 (June 10, 2011): 425–33. http://dx.doi.org/10.11646/zoosymposia.5.1.36.

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The microhabitat preference of caddisfly (Trichoptera) communities was studied in 8 types of microhabitats in a fast-flowing, medium-sized, lowland stream in Latvia. A total 36 caddisfly taxa belonging to 14 families were recorded in microhabitat samples. A PCA biplot of caddisfly taxa abundance in microhabitats showed 3 distinct caddisfly taxa groups: depositional [Limnephilidae Gen. sp., Anabolia laevis (Zetterstedt) and Lasiocephala basalis (Kolenati)], lithal [Agapetus ochripes Curtis and Psychomyia pusilla (Fabricius)], and submerged macrophyte and water moss caddisfly microhabitat communities (Ithytrichia lamellaris Eaton, Hydropsyche siltalai Döhler and Hydropsyche spp. juv.). The habitats of these groups differed in current velocity and the amount of plant detritus. All size lithal microhabitat samples were characterized by grazer and scraper dominance and a similar proportion of gatherers/collectors. Macrolithal microhabitat with Fontinalis sp. and submerged macrophyte microhabitats were rich with passive filter feeders. Functional feeding type ratios were equal, with dominance of shredders, in FPOM, CPOM in akal microhabitats. Submerged macrophyte and Fontinalis sp. provided suitable niches for higher species numbers than the other microhabitat types, whereas abundance was the highest in the lithal microhabitats with the largest particle size.
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Purser, A., J. Ontrup, T. Schoening, L. Thomsen, R. Tong, V. Unnithan, and T. W. Nattkemper. "Microhabitat and shrimp abundance within a Norwegian cold-water coral ecosystem." Biogeosciences 10, no. 9 (September 3, 2013): 5779–91. http://dx.doi.org/10.5194/bg-10-5779-2013.

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Abstract. Cold-water coral (CWC) reefs are heterogeneous ecosystems comprising numerous microhabitats. A typical European CWC reef provides various biogenic microhabitats (within, on and surrounding colonies of coral species such as Lophelia pertusa, Paragorgia arborea and Primnoa resedaeformis, or formed by their remains after death). These microhabitats may be surrounded and intermixed with non-biogenic microhabitats (soft sediment, hard ground, gravel/pebbles, steep walls). To date, studies of distribution of sessile fauna across CWC reefs have been more numerous than those investigating mobile fauna distribution. In this study we quantified shrimp densities associated with key CWC microhabitat categories at the Røst Reef, Norway, by analysing image data collected by towed video sled in June 2007. We also investigated shrimp distribution patterns on the local scale (<40 cm) and how these may vary with microhabitat. Shrimp abundances at the Røst Reef were on average an order of magnitude greater in biogenic reef microhabitats than in non-biogenic microhabitats. Greatest shrimp densities were observed in association with live Paragorgia arborea microhabitat (43 shrimp m−2, SD = 35.5), live Primnoa resedaeformis microhabitat (41.6 shrimp m−2, SD = 26.1) and live Lophelia pertusa microhabitat (24.4 shrimp m−2, SD = 18.6). In non-biogenic microhabitat, shrimp densities were <2 shrimp m−2. CWC reef microhabitats appear to support greater shrimp densities than the surrounding non-biogenic microhabitats at the Røst Reef, at least at the time of survey.
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Johnson, M. A., R. Kirby, S. Wang, and J. B. Losos. "What drives variation in habitat use by Anolis lizards: habitat availability or selectivity?" Canadian Journal of Zoology 84, no. 6 (June 2006): 877–86. http://dx.doi.org/10.1139/z06-068.

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Geographic variation in habitat availability may drive geographic variation in a species’ habitat use; alternatively, species adapted to particular habitat characteristics may use a habitat regardless of its availability within an environment. In this study, we investigated habitat use of two sympatric species of Anolis lizards that are morphologically specialized to use different microhabitats. We examined variation in microhabitat use and availability among four distinct forest types. In each forest type, we quantified available microhabitats (i.e., perch diameter, angle of inclination, and visibility), as well as microhabitats actually used by each species. We found that species consistently differed in microhabitat use, corresponding to each species’ morphological specializations. However, microhabitat use of both species varied among sites. This variation in Anolis gundlachi Peters, 1876 reflected differences in microhabitat availability, while the variation in Anolis krugi Peters, 1876 resulted from differential microhabitat selectivity. These results indicate that both habitat availability and habitat preferences must be examined in multiple localities for a species to understand the causes of variation in its habitat use.
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Manna, Luisa Resende, Carla Ferreira Rezende, and Rosana Mazzoni. "Habitat use by Astyanax taeniatus (Jenyns, 1842) (Characiformes: Characidae) in a coastal stream from Southeast Brazil." Neotropical Ichthyology 12, no. 1 (March 2014): 187–92. http://dx.doi.org/10.1590/s1679-62252014000100020.

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The habitat use of a stream-dwelling Astyanax taeniatus from the State of Rio de Janeiro was investigated. We performed 12 h of underwater observation in a 200 m long stretch in the upper Roncador stream and quantified the following microhabitat descriptors: (i) water velocity, (ii) distance from the stream bank, (iii) substratum, and (iv) water column depth. Microhabitat selectivity was analyzed by comparing the microhabitat used by fish and the microhabitat available in the study site as well as by applying the Ivlev Electivity Index to the microhabitat use data. Differences in the use and availability of the various microhabitats revealed non-stochastic patterns of spatial occupation by A. taeniatus, which was selective for two of the four analyzed microhabitats. Our findings indicated that A. taeniatusis associated with habitats that have higher depths, low water velocity, and sand and bedrock substratum.
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SILVA, Cláudia P. D. "ALIMENTAÇÃO E DISTRIBUIÇÃO ESPACIAL DE ALGUMAS ESPÉCIES DE PEIXES DO IGARAPÉ DO CANDIRÚ, AMAZONAS, BRASIL." Acta Amazonica 23, no. 2-3 (1993): 271–85. http://dx.doi.org/10.1590/1809-43921993233285.

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O conteúdo estomacal de 29 espécies de peixes e a distribuição destas em diferentes microhabitats existentes em um igarapé de terra-firme, igarapé do Candirú, na Amazônia Central, foram analisados. Sete tipos de microhabitats foram observados e algumas espécies apresentaram estruturas morfológicas adaptativas que eram adequadas à captura do alimento consumido e ao microhabitat onde foram sempre coletadas. A relação entre a dieta alimentar e o microhabitat no qual a espécie permanecia, foi observada. Outras espécies apresentaram mudanças na escolha do microhabitat em relação ao seu estágio de desenvolvimento, embora não tenha sido observada alteração quanto ao tipo de alimento consumido. Neste caso é possível que a diminuição no risco de predação seja o fator principal influenciando na mudança de microhabitat. Neste trabalho são discutidos alguns prováveis fatores que influenciam as espécies na escolha de um determinado microhabitat a ser explorado.
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Cabral Eterovick, Paula, and Isalita Souza Barros. "Niche occupancy in south-eastern Brazilian tadpole communities in montane-meadow streams." Journal of Tropical Ecology 19, no. 4 (July 2003): 439–48. http://dx.doi.org/10.1017/s026646740300347x.

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Microhabitat use by tadpole species was investigated in streams of montane meadows of the Serra do Cipó, south-eastern Brazil. Microhabitats were classified into 24 types based on water depth, current, aquatic vegetation and substrate type, and quantified in 16 streams. A total of 844 tadpoles from 19 species was recorded, as well as microhabitat types used. Tadpoles, from all species pooled, used microhabitat types in the proportions available in the set of sampled streams. Diversity of microhabitats used was considered as a measure of niche breadth for tadpoles, and microhabitat diversity in streams was interpreted as available niche space. For the most part, species used microhabitats in different proportions, and conspecifics differed in microhabitat use among different streams. Neither niche breadths nor niche overlaps of tadpoles could be related to the number of species occupying streams. Thus not all available niche space may be occupied by tadpole species. More generalist species (those with broader niches) did not generally occupy more streams. Behavioural flexibility of tadpoles in microhabitat use may be a response to the unpredictability of the montane-meadow stream habitat. The role of adult anurans in choosing oviposition sites may also influence the distribution of tadpole species among streams.
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Wilson, Shaun K., Martial Depczynski, Christopher J. Fulton, Thomas H. Holmes, Ben T. Radford, and Paul Tinkler. "Influence of nursery microhabitats on the future abundance of a coral reef fish." Proceedings of the Royal Society B: Biological Sciences 283, no. 1836 (August 17, 2016): 20160903. http://dx.doi.org/10.1098/rspb.2016.0903.

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Species habitat associations are often complex, making it difficult to assess their influence on populations. Among coral reef fishes, habitat requirements vary among species and with ontogeny, but the relative importance of nursery and adult-preferred habitats on future abundances remain unclear. Moreover, adult populations may be influenced by recruitment of juveniles and assessments of habitat importance should consider relative effects of juvenile abundance. We conducted surveys across 16 sites and 200 km of reef to identify the microhabitat preferences of juveniles, sub-adults and adults of the damselfish Pomacentrus moluccensis . Microhabitat preferences at different life-history stages were then combined with 6 years of juvenile abundance and microhabitat availability data to show that the availability of preferred juvenile microhabitat (corymbose corals) at the time of settlement was a strong predictor of future sub-adult and adult abundance. However, the influence of nursery microhabitats on future population size differed spatially and at some locations abundance of juveniles and adult microhabitat (branching corals) were better predictors of local populations. Our results demonstrate that while juvenile microhabitats are important nurseries, the abundance of coral-dependent fishes is not solely dependent on these microhabitats, especially when microhabitats are readily available or following large influxes of juveniles.
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Lira, A. F. A., and A. M. DeSouza. "Microhabitat use of harvestmen (Arachnida: Opiliones) assemblage in the highland Brazilian Atlantic rainforest." Canadian Journal of Zoology 94, no. 5 (May 2016): 323–27. http://dx.doi.org/10.1139/cjz-2015-0219.

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Brazilian Atlantic rainforest is one of the largest hotspots of biodiversity in the world, with the highest number of harvestmen (Arachnida: Opiliones) species per given area. Currently, however, information on the species richness or spatial distribution of these arachnids in this northeastern Brazilian biome is extremely scarce. We conducted a field study to examine the microhabitat use of harvestmen in a fragment of the highland Atlantic rainforest. Harvestmen fauna and the microhabitat preference were assessed by nocturnal active search across 3 months (September to November 2011). Three hundred and eighteen individuals of eight harvestmen species from seven microhabitats were sampled. Four species were categorized as generalists, colonizing five or six microhabitats, whereas three species showed microhabitat specificity, being found in only one or two microhabitats. The forest ground microhabitat revealed higher harvestmen species richness, indicating that the majority of the harvestmen assemblage is composed of ground-dwelling species.
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Cole, Heather A., Steven G. Newmaster, F. Wayne Bell, Doug Pitt, and Al Stinson. "Influence of microhabitat on bryophyte diversity in Ontario mixedwood boreal forest." Canadian Journal of Forest Research 38, no. 7 (July 2008): 1867–76. http://dx.doi.org/10.1139/x08-036.

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As forest management intensifies, the conservation of forest biodiversity is a growing concern. Bryophytes are known to represent a considerable portion of plant diversity within northern forests. This is because bryophyte diversity is closely associated with microhabitat diversity. In this study, the influence of microhabitats on bryophyte diversity was investigated by comparing eight different boreal mixedwood microhabitats. The results indicate that bryophyte diversity (species richness, abundance, and evenness) is quite variable among microhabitats. The accumulation of species richness with microhabitat quantity within a forest stand also varies among microhabitats. β-diversity analyses indicate that the variety of microhabitats has considerable influence on community structure. Frequency analysis identified bryophytes that are restricted to or prefer particular microhabitats. Although all microhabitats are important to bryophyte diversity, decayed logs and rocks supported the greatest number of microhabitat-specific species, and rock microhabitats supported the largest total number of species. Recommendations for forest management, one of which emphasizes the need to recognize and manage the natural variety of microhabitats, such as downed woody material, found within the forests to conserve or restore bryophyte diversity are provided.
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Dissertations / Theses on the topic "Microhabitat"

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Lopes, Thais Sasso. "Padrões espaciais e temporais de ocorrência de anuros em riachos de Mata Atlântica e sua detecção por meio de DNA ambiental." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-20102016-142913/.

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O Brasil apresenta uma das maiores diversidade de espécies de anfíbios, sendo reconhecidas em torno de 500 espécies endêmicas no país, as quais são encontradas predominantemente em área de Mata Atlântica. O monitoramento da herpetofauna e conhecimento da dinâmica espacial e temporal destas espécies são informações básicas, porém, fundamentais ao desenvolvimento de outras áreas de pesquisa e conservação. Neste trabalho reunimos informações sobre ocorrência e abundância de três espécies típicas de riacho, Cycloramphus boraceiensis, Hylodes asper e Hylodes phyllodes e testamos o uso de DNA ambiental para detecção de comunidades de anuros. As amostragens ocorreram em um transecto de 100 a 115 m em quatro riachos no Núcleo de Picinguaba, localizado no Parque Estadual da Serra do Mar, São Paulo, Brasil. Coletas de abundância e uso do habitat ocorreram mensalmente de janeiro de 2007 a dezembro de 2010 e em meses alternados em 2011. Indivíduos pós-metamórficos foram amostrados por procura visual a montante de cada riacho, verificando-se todos os locais ao longo do leito. A localidade de cada indivíduo ativo e inativo foi mapeada e o uso do ambiente foi caracterizado em relação a seis parâmetros ecológicos. As amostras de DNA ambiental foram coletadas em 16 pontos em Abril de 2015. eDNA metabarcoding foi realizado com primer universal de anfíbios para uma região do gene mitocondrial (12S). Registramos um total de 6335 observações visuais. A abundância das três espécies variou entre e ao longo dos riachos, sendo que apenas a espécie Hylodes phyllodes foi registrada no riacho 2. Houve uma sazonalidade na abundância de Cycloramphus boraceiensis e Hylodes asper, sendo ambas espécies encontradas em maior número na estação chuvosa. As três espécies foram encontradas ativas majoritariamente em rochas úmidas ou molhadas, sem musgo e sem cobertura. Indivíduos inativos de Hylodes asper e H. Phyllodes foram encontrados majoritariamente em folhas secas sem musgo e sem cobertura. Por meio da técnica de eDNA metabarcoding, detectamos nove espécies, compatíveis com a amostragem tradicional. O DNA de espécies com fases do ciclo de vida atreladas aos riachos e com maior constância na amostragem tradicional foi detectado em maior proporção. Nossos estudos demonstraram que os resultados da amostragem tradicional e de eDNA metabarcoding fornecem informações fundamentais e complementares, sendo uma combinação de ambas metodologias potencialmente útil a futuros estudos de ecologia
Brazil ranks as the country with one of the highest amphibian species diversity. Streams in the Atlantic forest of southeastern Brazil have an important availability of microenvironments and harbors a particular richness in amphibian species. Monitoring herpetofauna and knowledge on their spatial and temporal dynamics provide primary information for ecological studies, and are essential to the development of other areas such as conservation biology. In this work we gather information on the occurrence and abundance of three torrent frogs, Cycloramphus boraceiensis, Hylodes asper and Hylodes phyllodes and examine the reliability of eDNA analysis to detect anuran communities. Samplings occurred within a 95 to 115 m transect in four streams in Núcleo Picinguaba, at the Parque Estadual da Serra do Mar, São Paulo, Brazil. Individual encounter number and their habitat were monthly recorded from January 2007 to December 2010 and every two months in 2011. We searched for post-metamorphic individuals while walking upstream for 30-60 min, checking all visually accessible spots in the streambed. The location of each active and inactive individual was mapped and its habitat use was characterized in relation to five ecological parameters. We collected eDNA samples at 16 sites on April, 2015. We used eDNA metabarcoding approach with a universal amphibian primer of a mitochondrial marker (12S) to detect amphibian communities. We recorded a total of 6335 visual observations. The three species abundance varied along and between streams and only Hylodes phyllodes were found in the stream 2. Abundance of C. boraceiensis and H. asper was significantly higher in the wet seasons. The three species were found active mainly in wet rocks, without moss and without cover. Inactive individuals of Hylodes asper and H. phyllodes were found mainly in dry leaves, without moss or cover. Through eDNA metabarcoding, we detected nine species, which were consistent with traditional survey results. DNA of riparian species and species with higher constancy in traditional surveys were detected in higher proportions. Our study showed that traditional survey and DNA metabarcoding results can be complementary and both methodologies can be combined in future ecology studies
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Garland, Lincoln. "Microhabitat ecology of small mammals on grassy road verges." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251021.

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Turvey, Shannon Lee. "The role of microhabitat associations in producing cross-taxa congruence." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/32496.

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Ecological interactions between taxa and environmental factors influencing the distribution of multiple taxa are both thought to generate spatial concordance, or congruence, in diversity. Observational studies have generally failed to find evidence for strong cross-taxa congruence across sites, and examples of experimental studies testing for congruence as a result of an underlying ecological mechanism are largely lacking. Here I present the results of an experimental study employing downed wood additions in a BACI design to test for an association of small mammals, carabid beetles, plants and amphibians with volume of downed wood as a possible mechanism for congruence. In addition, I tested for congruence in species richness and community similarity across these four groups. After one field season, there was no significant effect of treatment on within-group abundance, species richness or diversity. Species richness was not significantly correlated across taxa for any taxa pair. Small mammals, carabids and plants showed weak but significant congruence in community similarity, while the amphibian assemblage was not congruent with any other taxon. These results suggest that use of downed wood by these four groups does not generate congruence in diversity at fine scales, and that other ecological processes and sources of environmental variation may be more important in generating congruence in assemblage similarity. Furthermore, the potential of one taxon to act as an indicator of species-level diversity within another taxon may be limited.
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Zimmerman, Brian J. "Microhabitat Use by the Redside Dace (Clinostomus Elongatus) in Ohio." Bowling Green State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1250772332.

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Homan, Cassandra M. "Bottlenecks and Microhabitat Preference in Invasive Wall Lizard, Podarcis muralis." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1377868885.

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Mabray, Scott T. "Microhabitat Selection by Greater Sage-Grouse Hens in Southern Wyoming." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4160.

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Greater sage-grouse (Centrocercus urophasianus) populations have declined throughout the western United States over the past 3 decades. Habitat loss within the sagebrush steppe ecosystem is a major factor leading to sage-grouse population decline. Hen sage-grouse were captured, marked, and tracked during the summer of 2012 in southwestern and south-central Wyoming. I performed vegetation surveys, and avian point counts were performed at 1 early-season brood location, 1 late-season brood location, and an accompanying random location for each marked hen regardless of reproductive status. Multinomial models were run to determine what habitat variables were most informative in predicting site selection by hen sage-grouse. During early-brood season, hen sage-grouse with chicks selected sites that had high total shrub cover density; these areas also exhibited high densities of American kestrels (Falco sparverius). They did not avoid areas with common ravens (Corvus corax). Hen sage-grouse not accompanied by a brood selected sites with high total shrub cover and low densities of common ravens and American kestrels. During late-brood season, hen sage-grouse that were accompanied by a brood selected sites with high shrub cover and low densities of small avian predators, such as black-billed magpies (Pica hudsonia) and American kestrels as well as medium-sized predators, such as common ravens, buteo hawks (Buteo spp.), and northern harriers (Circus cyaneus). Hens that were not accompanied by broods were more often found in sites with high total shrub cover and low densities of small avian predators, but selected sites with higher densities of medium-sized predators. Hen sage-grouse select areas with high total shrub cover during early and late-brood season regardless of their reproductive status. By avoiding predators and selecting areas with cover, hens with broods can reduce the risk of their chicks being depredated.
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Anderson, Jason J. "Microhabitat Use by the Meadow Vole, Microtus Pennsylvanicus (Ord), on a Reclaimed Grassland." Youngstown State University / OhioLINK, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=ysu999188325.

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Hubert, Jay Bradley. "INTERSPECIFIC COMPETITION AND MICROHABITAT SELECTION IN THE GOLDEN MOUSE (OCHROTOMYS NUTTALLI)." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/668.

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The golden mouse (Ochrotomys nuttalli), a state-threatened species in Illinois, is sympatric throughout most of its geographic range with the ubiquitous white-footed mouse (Peromyscus leucopus). The degree of interspecific competitive interaction between these species has been investigated by previous researchers, with often conflicting results. I live trapped and marked both species on two grids from 21 May 2008 through 8 May 2009. One grid was the control area; from the second grid I removed white-footed mice. Habitat on the grids was very similar for six measured habitat variables. My objectives were to document the extent of competition between the two species as indicated by a population density or behavioral response of golden mice to removal of white-footed mice on the experimental grid, and to determine if white-footed mouse presence or habitat variables affected the capture of golden mice. During 6,528 trap nights per grid, I captured a total of 22 individual O. nuttalli and 66 P. leucopus on the control grid, and 48 O. nuttalli and 202 P. leucopus on the removal grid. Compared to previous studies (Rose, 2008), the number of individual golden mice captured on my two sites (n = 70) was very large. Whereas I expected an increase in numbers and space use of golden mice upon removal of Peromyscus, the only statistically significant change was an apparent decrease in space use--there was no population density change. These results, which may indicate a lack of interspecific competition, are more likely the result of experimental design flaws, especially considering the following results. The likelihood of trapping a golden mouse at any given station on the control site was unaffected by any of the six habitat variables. White-footed mouse presence significantly decreased the likelihood of capturing golden mice on both sites. These results were the same for both elevated and ground traps. On the experimental site, golden mice changed from predominantly arboreal space use before Peromyscus removal to equal space use between arboreal and ground habitat after Peromyscusremoval. These results illustrate a spatially segregated habitat with competitively superior white-footed mice dominating the ground level microhabitat and golden mice staying predominantly in elevated microhabitat. My study, and others, demonstrate that golden mice in southern Illinois are likely habitat generalists (Morzillo et al., 2003), competitively inferior to Peromyscus(Feldhamer and Maycroft, 1992), and excluded from certain microhabitat; although it may be they actually prefer different microhabitats.
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Sailer, Gabriele. "The roles of local disturbance history and microhabitat parameters for stream biota." Diss., [S.l.] : [s.n.], 2005. http://edoc.ub.uni-muenchen.de/archive/00004500.

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Dennis, Paul Gareth. "How do rhizosphere bacteria interact with their environment at the microhabitat scale?" Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1444697/.

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The rhizosphere supports greater bacterial densities than root-free soil. Rhizosphere bacteria (RB) can affect plant health and nutrition however, attempts to manipulate introduced and/or indigenous communities to benefit plants are unreliable. Current evidence indicates that habitat factors strongly influence bacterial communities. In the rhizosphere many processes give rise to a high degree of habitat heterogeneity therefore, to understand how RB interact with their environment their ecology should be studied at the micro-spatial-scale. The objectives of this research were to develop a method for sampling RB at the microhabitat-scale, and to investigate techniques that can link these samples with key factors, such as substrate availability and pH. A novel method enabling non-destructive, micro-scale sampling of bacteria was developed. Its efficiency for removing bacteria from the root surface was similar to that of existing methods but offered greater accuracy in estimating RB densities. The novel method revealed that RB density was inversely proportional to distance from the apex of Brassica napus roots and that the composition of RB communities was highly variable at the micro-scale. Imaging of 14C-labelled root exudates revealed that RB density was not reflective of exudate availability but attempts to link RB with available C were unsuccessful. A key outcome of this work was the development of a strategy to combine micro sampling with microelectrode measurements. Microelectrodes revealed that pH at the root surface was highly variable at the micro-scale which, combined with similar observations for RB density/diversity, highlights the appropriateness of this scale for linking RB communities with their environment. This thesis considers the link between RB community structure, habitat and function and provides a detailed description of micro-sample analyses as well as a set of methods that will enable for the first time, the interactions between any surface-associated bacteria and their environment to be investigated at a microhabitat-scale.
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Books on the topic "Microhabitat"

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Schumacher, Stefanie. Mikrohabitatansprüche benthischer Foraminiferen in Sedimenten des Südatlantiks =: Microhabitat preferences of benthic foraminifera in South Atlantic Ocean sediments. Bremerhaven: Alfred-Wegener-Institut für Polar- und Meeresforschung, 2001.

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Rissman, Rebecca. Microhabitats. Chicago, Ill: Capstone Heinemann Library, 2013.

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A, Simenstad Charles, University of Washington. Wetland Ecosystem Team., United States. National Ocean Service. Marine and Estuarine Management Division., and Padilla Bay National Estuarine Research Reserve (Wash.), eds. Assemblage structure, microhabitat distribution, and food web linkages of epibenthic crustaceans in Padilla Bay National Estuarine Research Reserve, Washington. Mount Vernon, Wash: Padilla Bay National Estuarine Research Reserve, 1990.

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Merilaita, Sami. Cryptic Coloration, Microhabitat Choice and Polymorphism in Idotea Baltica (Isopoda. Uppsala Universitet, 1999.

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Gallant, Alisa L. Revegetation-microhabitat relations in the blast zone of Mount St. Helens. 1985.

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Gallant, Alisa L. Revegetation-microhabitat relations in the blast zone of Mount St. Helens. 1985.

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Pounds, Joseph Alan. Ecomorphology, locomotion, and microhabitat structure: Patterns in a tropical mainland Anolis community. 1987.

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Rayner, Elizabeth. Mycophagy and microhabitat use by the yellowpine chipmunk in riparian and upland habitats. 1992.

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Jones, Cheri A. Microhabitat use by Podomys floridanus in the high pine lands of Putnam County, Florida. 1990.

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Penrod, Kristine. The effect of wind velocity on desiccation and microhabitat selection in the intertidal snail Littorina sitkana. 1999.

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Book chapters on the topic "Microhabitat"

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da Silva, Thamar Holanda, Débora Amorim Saraiva Silva, André Thomazini, Carlos Ernesto Gonçalves Reynaud Schaefer, and Luiz Henrique Rosa. "Antarctic Permafrost: An Unexplored Fungal Microhabitat at the Edge of Life." In Fungi of Antarctica, 147–64. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18367-7_7.

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Hare, Matthew T. Ó., and Kevin J. Murphy. "Invertebrate hydraulic microhabitat and community structure in Callitriche stagnalis Scop. patches." In Biology, Ecology and Management of Aquatic Plants, 169–76. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-0922-4_24.

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Harmelin-Vivien, M. L., J. G. Harmelin, and V. Leboulleux. "Microhabitat requirements for settlement of juvenile sparid fishes on Mediterranean rocky shores." In Space Partition within Aquatic Ecosystems, 309–20. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0293-3_28.

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Downey, Fiona J., and Chris R. Dickman. "Macro- and microhabitat relationships among lizards of sandridge desert in central Australia." In Herpetology in Australia, 133–38. P.O. Box 20, Mosman NSW 2088, Australia: Royal Zoological Society of New South Wales, 1993. http://dx.doi.org/10.7882/rzsnsw.1993.020.

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Hossner, L. R., Eiju Yatsu, and Iain M. Young. "Microhabitats." In Encyclopedia of Soil Science, 450–53. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-3995-9_353.

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Motta, Philip J., Kari B. Clifton, Patricia Hernandez, and Bradley T. Eggold. "Ecomorphological correlates in ten species of subtropical seagrass fishes: diet and microhabitat utilization." In Ecomorphology of fishes, 37–60. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-1356-6_4.

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Cardich, Jorge, María Morales, Luis Quipúzcoa, Abdelfettah Sifeddine, and Dimitri Gutiérrez. "Benthic Foraminiferal Communities and Microhabitat Selection on the Continental Shelf Off Central Peru." In Cellular Origin, Life in Extreme Habitats and Astrobiology, 323–40. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1896-8_17.

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Copp, Gordon H. "Comparative microhabitat use of cyprinid larvae and juveniles in a lotic floodplain channel." In Environmental biology of European cyprinids, 181–94. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2544-4_16.

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Zweimüller, Irene. "Microhabitat use by two small benthic stream fish in a 2nd order stream." In The Importance of Aquatic-Terrestrial Ecotones for Freshwater Fish, 125–37. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-3360-1_12.

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Yamada, Toshihiro, Toshinori Okuda, and N. Manokaran. "Microhabitat Preference of Two Sympatric Scaphium Species in a 50 ha Plot in Pasoh." In Pasoh, 137–47. Tokyo: Springer Japan, 2003. http://dx.doi.org/10.1007/978-4-431-67008-7_10.

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Conference papers on the topic "Microhabitat"

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Yi, Gan, Zhang Zhi-wei, and L. I. Sheng. "Studies on Microhabitat ACO for application to JSSP." In 2010 International Conference on Logistics Systems and Intelligent Management (ICLSIM). IEEE, 2010. http://dx.doi.org/10.1109/iclsim.2010.5461320.

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Thurber, Mark William, Sebastian Valdivieso, Gabriel Noboa, and Francisco Silva. "Microhabitat Protection during Geophysical Exploration in High Diversity Tropical Rainforest." In SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production. Society of Petroleum Engineers, 2008. http://dx.doi.org/10.2118/111536-ms.

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Takagi, Shota, Kenichi Ohara, Masaru Kojima, Yasushi Mae, and Tatsuo Arai. "Improving the speed of 3D information presentation in a microhabitat." In 2013 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2013. http://dx.doi.org/10.1109/icma.2013.6617926.

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Chino, Yuiko, Gregory Pasternack, Takashi Gomi, and Shinji Fukuda. "Flow dependent dynamics of microhabitat patches for fish habitat assessment." In Proceedings of the 39th IAHR World Congress From Snow to Sea. Spain: International Association for Hydro-Environment Engineering and Research (IAHR), 2022. http://dx.doi.org/10.3850/iahr-39wc252171192022347.

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Adenan, Sakeenah, Jane Oja, Talaat Abdel-Fattah, and Juha Alatalo. "Linking Soil Chemical Parameters and Fungal Diversity in Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0068.

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Given the vast expanse of Qatar’s dryland ecosystems, agricultural productivity and soil stability is highly dependent on the diversity of soil microbiota. The soil environment is a heterogeneous habitat shaped by various components like chemical (organic matter, salinity and nutrients) and biological (fungal diversity and vegetation) properties that form multitudes of different microhabitats. Soil microbial diversity changes along environmental gradients. It is hypothesized that a “stable” microhabitat is one that is inhabited by a large diversity of established microorganisms that are best adapted to the niche. Microorganisms like fungi serve as the underlying biological drivers for biochemical processes within the soil. The key objective of this study is to evaluate the fungal diversity and abundance present within the Qatari soil using molecular-based tools and evaluate potential relationships between the identified fungal communities with chemical properties of the habitat. We found that the composition of fungi and AMF varied between different habitats around Qatar. Despite the lack of significant differences in the measured soil chemical parameters between sampled sites, it is evident that AMF species are more abundant than compared to that of other fungal species in most of the study sites; thus, suggesting that other factors like land use may also be an essential component explaining the variation in fungal communities.
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Wu, Fangjie, Chengxue Zhang, Jingchao Zhang, and Zhiyuan Duan. "Application of a Microhabitat Particle Swarm Algorithm in Transformer Substation Optimization." In 2006 International Conference on Power System Technology. IEEE, 2006. http://dx.doi.org/10.1109/icpst.2006.321567.

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Fei, Teng, Valentijn Venus, Bert Toxopeus, Andrew K. Skidmore, Martin Schlerf, Yaolin Liu, Sjef van Overdijk, and Meng Bian. "Understanding lizard's microhabitat use based on a mechanistic model of behavioral thermoregulation." In International Conference on Earth Observation Data Processing and Analysis, edited by Deren Li, Jianya Gong, and Huayi Wu. SPIE, 2008. http://dx.doi.org/10.1117/12.815981.

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Asbeck, Thomas, Patrick Pyttel, and Jürgen Bauhus. "Tree microhabitat abundance and richness in Central European montane forests as indicators for future old growth elements." In 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107892.

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Fehrenbacher, Jennifer S., M. Kelsey Lane, Theresa Fritz-Endres, and Haojia Ren. "GEOCHEMISTRY OF CULTURED AND PLANKTON TOW CAPTURED PLANKTIC FORAMINIFERA SUGGEST NON-SPINOSE SPECIES LIVE IN A PARTICULATE MICROHABITAT." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356101.

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Zamora, Lluís. "On the Use of Stereo-Video System to Assess Microhabitat Preferences of the Spanish Toothcarp and Mosquitofish in Coastal Salt Marshes." In SIBIC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/blsf2022013083.

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Reports on the topic "Microhabitat"

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Sanders, Suzanne, Jessica Kirschbaum, and Sarah Johnson. Arctic and alpine rare plant population dynamics at Isle Royale National Park: Response to changing lake levels. National Park Service, February 2022. http://dx.doi.org/10.36967/nrr-2291496.

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Arctic and alpine rare plant species populate wave-splashed rocky shorelines of Isle Royale National Park, where summer temperatures are moderated by Lake Superior. Using data from the mid-1990s and resurvey data from 1998, 2003, and 2016, we examined trajectories of change in occurrence for 25 species at 28 sites coincident with rising lake levels that followed a period of sustained low levels. We analyzed changes in site occupancy of species individually and by functional, geographic, and microhabitat groupings. We also assessed change in population structure for four focal species: Saxifraga paniculata, S. tricuspidata, Pinguicula vulgaris, and Vaccinium uliginosum. Of the 25 species, site occupancy increased for 13 and remained steady for six, declining in another six. Site occupancy did not change over time within functional, geographic, and microhabitat groupings. The four focal species showed similar dynamic and systematically changing populations, responding to similar ecological exposures. We hypothesize that the moderating influence of Lake Superior on air temperature benefits these populations despite warming temperatures and a 15-year sustained low water period. This work contributes to our understanding of the responses of at-risk species to extreme climate events.
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