Anthropogenic Habitat
Mostrando 25-36 de 39 artigos, teses e dissertações.
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25. Patterns of genetic diversity in southern and southeastern Araucaria angustifolia (Bert.) O. Kuntze relict populations
Habitat fragmentation and a decrease in population size may lead to a loss in population genetic diversity. For the first time, the reduction in genetic diversity in the northernmost limit of natural occurence (southeastern Brazil) of Araucaria angustifolia in comparison with populations in the main area of the species continuous natural distribution (southe
Publicado em: 2010
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26. GENÉTICA, DISTRIBUIÇÃO E CONSERVAÇÃO DO GAVIÃO-REAL (Harpia harpyja) NO BRASIL
The harpy eagle occurs in the forests of the Neotropical region; it is widely distributed in Brazil where its occurrence has been principally registered in the Amazonian and Atlantic rainforests. Between these two biomes exists a corridor of open vegetation with forest connections where this species has also been registered. Brazilian forests have been drast
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/06/2009
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27. Patterns of genetic diversity in southern and southeastern Araucaria angustifolia (Bert.) O. Kuntze relict populations
Habitat fragmentation and a decrease in population size may lead to a loss in population genetic diversity. For the first time, the reduction in genetic diversity in the northernmost limit of natural occurence (southeastern Brazil) of Araucaria angustifolia in comparison with populations in the main area of the species continuous natural distribution (southe
Genetics and Molecular Biology. Publicado em: 26/06/2009
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28. Cyclical temporal variation in fish assemblages at one continental and one insular sandy beaches in the Sepetiba bay. / Variações temporais cíclicas nas assembléias de peixes de uma praia continental e uma insular na baía de Sepetiba.
Bays are semi-closed coastal systems that have beaches whose environmental characteristics, location and degree of anthropogenic influences determine fish assemblages that recruit in these systems and are modeled by seasonal e short term cyclical variation. Two sandy beaches in the outer zone of Sepetiba bay were sampled throughout seasonal, daily and tide c
Publicado em: 2008
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29. Phrynops geoffroanus (Testudines, Chelidae) em ambiente antrópico: perfil hematológico e microbiota oral / Phrynops geoffroanus (Testudines, Chelidae) in anthropogenic environment: blood profile and oral microbiota
Phrynops geoffroanus é uma espécie de quelônio com ampla distribuição na América do Sul, ocupando diversos tipos de habitat, inclusive rios urbanos poluídos. Com o objetivo de se conhecer aspectos ecológicos da espécie em ambientes antropizados, durante os anos de 2006 e 2007 foi realizado um estudo na bacia do rio Piracicaba, tendo como sítios amo
Publicado em: 2008
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30. Environmental constraints structuring fish assemblages in the river Paraíba do Sul watershed: Land use condition, habitat and physico-chemical water quality. / Condicionantes ambientais estruturadoras das assembléias de peixes da bacia do rio Paraíba do Sul: Condição do uso da terra, do habitat físico e qualidade físico-química da água.
Structure and dynamic of the Paraíba do Sul fish assemblages and their relationship with environmental constraints in both regional (e.g. altitude, area of drainage, flow and land use) and local (microhabitat and physico-chemical) scales were studied. A fish sampling programme was carried out in the whole extension of the main channel (1100 km) and in the s
Publicado em: 2008
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31. Efeitos do fogo sobre a taxocenose de lagartos em áreas de Cerrado sensu stricto no Brasil Central
The fire is a natural agent of disturbance in tropical savannas, modifying the structure of animal and plant communities and transforming the landscape. As intermediate agent of disturbance the burns can contribute for maintenance of the diversity in the Cerrado. The effects of fire on the structure of lizard assemblages in the Cerrado of Central Brazil had
Publicado em: 2007
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32. Biogeography and conservation of the herpetofauna of the Upland Pine-Oak Forests of Honduras
The upland pine-oak forest herpetofauna constitutes the smallest segment distributed in the major habitat types in Honduras, due to its occurrence at moderate elevations in relatively inhospitable environments, compared to more mesic habitats in the country. This segment, however, is subject to considerable environmental threat as a consequence of annual bur
Biota Neotropica. Publicado em: 2007
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33. Aspectos da história de vida de Guadua tagoara (Nees) Kunth (Poaceae:Bambuseae) na Serra dos Órgãos, RJ
Guadua tagoara (Nees) Kunth is a large sized bamboo native of the Brazilian Atlantic Rain Forest, with a semi-scandent habitat, pachymorphic rhizome and thorns for fixation on trees. Nowadays this bamboo is considered an invasive species in secondary forests, where its populations are supposedly in expansion. The general objective of this study, developed in
Publicado em: 2007
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34. Efeito da degradação de habitat sobre a estrutura de interações entre plantas e insetos fitofagos / The effect of anthropogenic disturbance on the structure of interactions between plants and phytophagous insects
Examinei os efeitos da degradação antrópica sobre diferentes aspectos da diversidade de espécies e interações entre plantas da família Asteraceae e os insetos herbívoros cujas larvas se alimentam no interior de seus capítulos. Toda a amostragem de campo foi realizada em vinte áreas de cerrado com diferentes níveis de degradação antrópica em tr�
Publicado em: 2006
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35. Small mammals in a mosaic of remnant and anthropogenic habitats: matrix quality and connectivity in a fragmented Atlantic forest landscape / Pequenos mamíferos em um mosaico de habitats remanescentes e antropogênicos: qualidade da matriz e conectividade em uma paisagem fragmentada da Mata Atlântica
Esta dissertação fez parte do projeto temático Conservação da Biodiversidade em Paisagens Fragmentadas no Planalto Atlântico de São Paulo, que teve como objetivo geral estudar os efeitos da fragmentação da Mata Atlântica sobre diversas comunidades e processos ecológicos na região de Caucaia do Alto, SP. A dissertação está dividida em três
Publicado em: 2005
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36. Polinização e qualidade de sementes produzidas por Pychotria tenuinervis (Rubiaceae) em fragmentos de Mata Atlantica : efeito da distancia de bordas antropicas e naturais
Spatial and temporal climatic variability among areas may affect the reproductive events of plant and animal populations. Habitat changes or abrupt limits between habitats can affect the interactions between plants and their pollen and seed vectors and lead to a decrease in seed quality because of increased inbreeding. The isolation of forest patches and the
Publicado em: 2004