Tesis sobre el tema "Stream fauna"
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Marshall, Jonathan Coid y n/a. "Factors Influencing the Composition of Faunal Assemblages in Rainforest Stream Pools". Griffith University. Australian School of Environmental Studies, 2001. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040218.150407.
Texto completoMarshall, Jonathan Coid. "Factors Influencing the Composition of Faunal Assemblages in Rainforest Stream Pools". Thesis, Griffith University, 2003. http://hdl.handle.net/10072/366983.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Full Text
Cook, Benjamin Douglas y n/a. "An Analysis of Population Connectivity in Lotic Fauna: Constraints of Subdivision for Biotic Responses to Stream Habitat Restoration". Griffith University. Australian School of Environmental Studies, 2007. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070718.115649.
Texto completoCook, Benjamin Douglas. "An Analysis of Population Connectivity in Lotic Fauna: Constraints of Subdivision for Biotic Responses to Stream Habitat Restoration". Thesis, Griffith University, 2007. http://hdl.handle.net/10072/365959.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Faculty of Environmental Sciences
Full Text
Perkin, Joshuah Shantee. "Fragmentation in stream networks: quantification, consequences, and implications to decline of native fish fauna". Diss., Kansas State University, 2012. http://hdl.handle.net/2097/14954.
Texto completoDepartment of Biology
Keith B. Gido
Habitat fragmentation and loss threaten global biodiversity, but organism responses to changing habitat availability are mediated by structural properties of their habitats. In particular, organisms inhabiting dendritic landscapes with hierarchically arranged branches of habitat tend to have limited access to some patches even in the absence of fragmentation. Consequently, organisms inhabiting dendritic landscapes such as streams respond strongly to fragmentation. Using a combination of meta-analysis, field observations, and ecological network modeling I show that stream fishes respond to fragmentation in predictable ways. First, I addressed how dams and stream dewatering have created a mosaic of large river fragments throughout the Great Plains. Using a geographic information system and literature accounts of population status (i.e., stable, declining, extirpated) for eight “pelagic-spawning” fishes, I found stream fragment length predicted population status (ANOVA, F2,21 = 30.14, P < 0.01) and explained 71% of reported extirpations. In a second study, I applied a new measure of habitat connectivity (the Dendritic Connectivity Index; DCI) to 12 stream networks in Kansas to test the DCI as a predictor of fish response to fragmentation by road crossings. Results indicated fish communities in stream segments isolated by road crossings had reduced species richness (alpha diversity) and greater dissimilarity (beta diversity) to segments that maintained connectivity with the network, and the DCI predicted patterns in community similarity among networks (n = 12; F1,10 = 19.05, r2 = 0.66, P < 0.01). Finally, I modeled fish distributions in theoretical riverscapes to test for mechanistic linkages between fragmentation and local extirpations. Results suggested the number of small fragments predicted declines in patch occupancy, and the magnitude of change in occupancy varied with dispersal ability (“high” dispersers responded more strongly than “low” dispersers). Taken together, these works show context-dependencies in fish responses to fragmentation, but a unifying theme is that small fragments contribute to attenuated biodiversity. Moreover, the predictable manner in which stream fish react to fragmentation will aid in biodiversity conservation by revealing potential responses to future scenarios regarding changes to habitat connectivity.
Tod, Steven Peter. "What drives invertebrate communities in a chalk stream : from trophic relationships to allometric scaling". Thesis, Queen Mary, University of London, 2007. http://qmro.qmul.ac.uk/xmlui/handle/123456789/28174.
Texto completoAverhed, Björn. "Kan förändringar i bottenfaunan påvisas två år efter en bäckrestaurering?" Thesis, Linköping University, Linköping University, Department of Physics, Chemistry and Biology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57866.
Texto completoThe aim of this work is to analyze if a change in the benthic community can be detected two years after a restoration of a small stream. The samples were taken in a small stream at Tinnerö Eklandskap just south of Linköping. In addition to the restored area, two reference sites upstream and downstream of the restored area were sampled to compare to the restored site. The method used for sampling of benthic fauna in the stream was kick sampling. ASPT, Berger-Parker and Renkonen-indices were used to find out if there was any difference between the reference areas and the restored area. In addition to indices, rank-abundance curves and species lists were made to see if there was any trend difference between the different areas. The only index that showed a difference between the different areas was Berger-Parker diversity index. The reason why there were no greater differences between the areas may be due to the fact that two years is too short to allow time for the benthos to re-colonize the restored area.
Furse, Michael T. "The faunal richness of headwater streams". Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286013.
Texto completoKelly, Lucy Claire. "Community ecology and genetics of macroinvertebrates in permanent Macaronesian streams". Thesis, University of Plymouth, 2001. http://hdl.handle.net/10026.1/738.
Texto completoWright-Stow, Aslan E. "Biomonitoring, and the macroinvertebrate faunas of Canterbury streams". Thesis, University of Canterbury. Department of Zoology, 2001. http://hdl.handle.net/10092/4825.
Texto completoSmith, Kathleen Ann. "Quaternary environmental changes in the fluvial and faunal history of central Northamptonshire". Thesis, University of Northampton, 1999. http://nectar.northampton.ac.uk/2996/.
Texto completoVasconcelos, Márlon de Castro. "Efeito do sedimento fino de origem terrestre sobre a fauna de macroinvertebrados bentônicos em riachos". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/10908.
Texto completoOne of the main forms by which aquatic ecosystems are impacted is the input of fine sediment. The objective of our study was to determinate by one experiment the effect of fine sediment on benthic macroinvertebrates in subtropical streams. The study area was the Forqueta River in Barra do Ouro district of Maquiné city, Rio Grande do Sul, Brazil. It’s was added 3138 cm3 of sediment, in two fractions: fine sand (0mm – 0.25mm) and coarse sand (0.25mm – 1mm) into the river with two levels (with or without sediment) . The data were analyzed by Analysis of Variance (ANOVA two-way) for abundance, richness and rarefied richness, the last one intended to compare species richness based on an equivalent number of individuals. Using Multivaried Analysis of Variance (MANOVA) we examined the effect of fine sediment on relative abundance and composition of species. Sediment was used as one factor in four levels. A Partial Canonical Correspondence Analysis (pCCA) was used to examine the effect of the disturbance event on communities. The interaction between the flow and the factors of the sediment was examined. There was a negative effect of fine sediment on abundance, richness and species composition, but the effect was null on relative abundance and rarefaction of species richness. The flow was important for distribution of individuals colleted. The abundance, species richness and rarefied richness were highest on places with fastest flows. The flow increased the effect of fine sand on abundance and rarefied richness. The pCCA showed that disturbance events of small frequency consisting of input of terrestrial sediment have no negative effects on benthic macroinvertebrate. The relationship between flow and benthic macroinvertebrates can be attributed to the ecological preferences of species. These results showed that fine sediment impact is harmful for benthic macroinvertebrates in streams, particularly in termsof abundance. This negative effect may be a consequence of loss of habitat, reduced food quality, physiological stress and others forms. Because some results differ from other studies, the effect of the fine sediment on the benthic macroinvertebrates needs to be better studied.
Vilardi, Gabriel Cestari. "Distribuição espacial de insetos predadores em riachos da região norte da Serra do Mar, Estado de São Paulo". Universidade Federal de São Carlos, 2010. https://repositorio.ufscar.br/handle/ufscar/1979.
Texto completoUniversidade Federal de Minas Gerais
This study aimed at determining whether environmental factors as vegetation, environmental integrity, water flow, water velocity and physical and chemical characteristics of the water (pH, dissolved oxygen, temperature and conductivity) can predict the richness, abundance and faunal composition of predator insects which live in bedrock of Atlantic Rainforest streams. The collecting of fauna has been carried out in streams located in the Núcleos Santa Virgínia and Cunha-Indaiá, both located in the Parque Estadual Serra do Mar, São Paulo state, in October 2006 and October and November 2007. In each stream was selected a stretch of about 50 meters. The fauna associated with 25 cobble type rocks was collected with the aid of a hand net with a mesh of 0.25 millimeters. Were collected 779 individuals in 17 taxa. The most abundant taxa were Anacroneuria, Limnocoris, Neotrephes and Argia. The Detrended Correspondence Analysis (DCA) showed a cluster of sampling points according to the scale of the vegetation cover. The graphic representation of similarity matrix Morisita- Horn by UPGMA revealed the formation of clusters consisting of the fauna collected at sites with different water flows, but with similar vegetation cover. The Mantel Test showed a significant relationship of the predatory insects fauna in the vegetation cover (r = -0.189, p = 0.017 for 5000 permutations) and water velocity (p = 0.05 and r = -0.3 for 5000 permutations). The partial coefficients estimated from multiple linear regression showed that the flow has significant influence on the analyzed entomofauna.
O presente trabalho objetivou verificar se os fatores ambientais como cobertura vegetal, integridade ambiental, vazão, velocidade da água e características físicas e químicas da água (pH, oxigênio dissolvido, temperatura e condutividade) podem predizer a riqueza, a abundância e a composição faunística de insetos predadores que vivem em substrato rochoso de riachos da Mata Atlântica. As coletas de fauna foram realizadas em riachos localizados nos Núcleos Santa Virgínia e Cunha-Indaiá, ambos localizados no Parque Estadual Serra do Mar, Estado de São Paulo, nos meses de outubro de 2006 e outubro e novembro de 2007. Em cada riacho, foi selecionado um trecho de aproximadamente 50 metros. A fauna associada a 25 rochas do tipo calhau foi coletada com o auxílio de um puçá com malha de 0,25 milímetros. Foram coletados 779 indivíduos distribuídos em 17 gêneros. Os táxons mais abundantes foram Anacroneuria, Limnocoris, Neotrephes e Argia. A Análise de Correspondência Destendenciada (DCA) mostrou um agrupamento dos pontos de coleta de acordo com a escala de cobertura vegetal. A representação gráfica da matriz de similaridade de Morisita-Horn, através da UPGMA, revelou a formação de agrupamentos constituídos pela fauna coletada em locais com diferentes vazões, porém com coberturas vegetais similares. O Teste de Mantel mostrou uma relação significativa da fauna de insetos predadores com a cobertura vegetal (r = -0,189; p = 0,017 para 5000 permutações) e a velocidade da água (p = 0,05, r = -0,3 para 5000 permutações). Os coeficientes parciais estimados a partir da regressão linear múltipla demonstraram que a vazão teve influência significativa sobre a entomofauna analisada
Denis, Alice S. "Impacts de l'anthropisation sur la diversité odonatologique au sein des cours d'eau : vers une meilleure prise en compte des espèces de la directive habitats faune flore". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30104/document.
Texto completoIn a context of global biodiversity crisis, reconciling the development of wealth-generating industry and agriculture with nature conservation is a crucial issue. Economic stakeholders are legally obliged to apply the mitigation hierarchy doctrine and thus "avoid, mitigate, and compensate" for their project's impacts. However, for invertebrate protected species, and particularly dragonfly species, basic knowledge on their ecology and population dynamics is lacking. It is thus difficult to accurately anticipate the impacts and propose efficient avoidance and compensation measures. This is particularly true on rivers, which are ecosystems under high pressure owing to their utility for human beings (e.g. water and food resources, transport, energy production, leisure). The aim of this work is to improve knowledge of three protected riverine species of dragonflies: the Orange-spotted emerald Oxygastra curtisii (Dale, 1834), the Pronged clubtail Gomphus graslinii Rambur, 1842, and the Splendid cruiser Macromia splendens (Pictet, 1843), and to provide better assessment methods to evaluate the impacts of the anthropisation of streams on their populations. We sought in particular (1) to improve environmental impact assessments and management of these species within Natura 2000 sites by proposing a standardised survey protocol, (2) to assess the consequences of habitat change, especially water temperature warming, on their phenology and morphology, and (3) to describe and evaluate the impacts of weirs and hydroelectric dams on their populations. This work took place in the Midi-Pyrénées region in southern France, where populations of these three species are still present. It was carried out in close partnership with the Conservatoire d'Espaces Naturels de Midi-Pyrénées, which coordinates the Regional Action Plan for Odonata, and the Functional Ecology Laboratory EcoLab to ensure direct transfer of the scientific knowledge acquired to the ecosystems managers, economic stakeholders and public authorities responsible for biodiversity conservation
Vinçon, Gilles. "Comparaison de la faune benthique des vallees d'aure et d'ossau, en vue de l'elaboration d'une methodologie de surveillance des cours d'eau de montagne". Toulouse 3, 1987. http://www.theses.fr/1987TOU30003.
Texto completoMoubayed, Zouheir. "Recherches sur la faunistique, l'ecologie et la zoogeographie de trois reseaux hydrographiques du liban : l'assi, le litani et le beyrout". Toulouse 3, 1986. http://www.theses.fr/1986TOU30183.
Texto completoBuisson, Juliette. "Hydrobiologie du massif du Vercors (Préalpes calcaires) et d'une rivière type : le Furon : Ecologie des diptères Chironomidae du Furon et de quelques cours d'eau pollués". Université Joseph Fourier (Grenoble ; 1971-2015), 1986. http://www.theses.fr/1986GRE10055.
Texto completoFlüeler, Marie-Josèphe. "Etude des macroinvertébrés -surtout des diptères- pour trois ruisseaux de plaine". Grenoble 1, 1986. http://www.theses.fr/1986GRE10045.
Texto completoHUANG, GUO-JING y 黃國靖. "The aquatic insect fauna and ecological studies of Chi Chia Wan stream". Thesis, 1987. http://ndltd.ncl.edu.tw/handle/09011290519751563152.
Texto completoWells, Jacquelyn M. "Effects of managed buffer zones on fauna and habitat associated with a headwater stream in the Indian Bay watershed in northeast Newfoundland /". 2002.
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