Anthropogenic Disturbance
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Efeitos antrÃpicos e variÃveis ambientais na formaÃÃo de um mosaico vegetacional em Floresta Estacional Semidecidual Montana em Itumirim, MG, Brasil / Anthropogenic effects and environmental variables in the formation of a vegetation mosaic in semideciduous seasonal forest montana in Itumirim, MG, Brasil.
The forest fragmentation is remarkable in the upper Rio Grande, southeastern Brazil, where is located the district of Itumirim. The study was performed in this region to compare trees from three sectors of a forest remnant on the basis of environmental variables and anthropogenic impacts occurring over time. The first sector suffered clear cutting and burnin
Publicado em: 2009
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14. Environmental characterization and land-use condition of the landscape of São Félix do Araguaia municipality / Caracterização ambiental e condição do uso da terra da paisagem do município de São Félix do Araguaia MT
There is an increase need for remote sensing data and associated analysis techniques in detecting and monitoring landscape change, particularly for resource management and planning. Information derived from remote sensing spatial data landscape has often been used to assist in the formulation of policies and provide insight into land-use patterns. To underst
Publicado em: 2009
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15. As comunidades macrobentÃnicas na avaliaÃÃo da qualidade ambiental de Ãreas estuarinas de Pernambuco
Estuarine environments are known by its importance in terms of complexity and biodiversity; however, anthropogenic activities continue to have a detrimental effect on its biodiversity levels on a worldwidescale. Several studies have emphasized the role of benthic macroinvertebrates as indicators of environmental quality status in these ecosystems, which have
Publicado em: 2009
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16. Biogeography and evolution of Amazonian triatomines (Heteroptera: Reduviidae): implications for Chagas disease surveillance in humid forest ecoregions
An ecological-evolutionary classification of Amazonian triatomines is proposed based on a revision of their main contemporary biogeographical patterns. Truly Amazonian triatomines include the Rhodniini, the Cavernicolini, and perhaps Eratyrus and some Bolboderini. The tribe Rhodniini comprises two major lineages (pictipes and robustus). The former gave rise
Memórias do Instituto Oswaldo Cruz. Publicado em: 21/09/2007
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17. 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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18. Use of the quotient De Liocourt in the evaluation of the diametric distribution in fragments of Ombrophylous Forest, Pernambuco State. / Utilização do quociente de De Liocourt na avaliação da distribuição diamétrica em fragmentos de Floresta Ombrófila em Pernambuco.
The general objective of this work was to use the quotient of De Liocourt in the evaluation of the diametric distribution in fragments of Ombrophylous Forest located in the city of Catende, Pernambuco state - Brazil, having as specific objectives: to describe the diametric structure of the fragments and the species of greater of Value of Importance (VI). And
Publicado em: 2007
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19. 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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20. 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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21. 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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22. Fenodinamcia de lianas e forofitos em um fragmento de cerrado em Itirapina (SP) / Liana and tree phenodynamic in a cerrado fragment from Itirapina (SP), Brazil
Different life-forms with different resources allocation strategies can show different phenologies. Biotic and abiotic interactions and anthropogenic disturbance may additionally influence the phenology. The aims of this study were (a) to test the phenology between trees with and without lianas at the edge and in the interior of a dense cerrado fragment in I
Publicado em: 2006
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23. The guild of fruit-feeding butterflies in a fragmented landscape in the upper Paraiba River basin, São Paulo, Brazil / A guilda de borboletas frugivoras em uma paisagem fragmentada no Alto Paraiba-SP
Most of the Atlantic Forest in the State of São Paulo occurs in fragments of various sizes. Previous studies indicate that forest fragmentation affects the butterfly community, changing its composition and diversity. In view of the importance of knowing the fauna of these forest remainders, the present work had the objective to characterize the assemblage o
Publicado em: 2006
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24. EFEITOS DO PETRÓLEO SOBRE A ASSOCIAÇÃO DE MACROINVERTEBRADOS BENTÔNICOS DE PRAIAS ARENOSAS DO EXTREMO SUL DO BRASIL.
The benthic marine organisms in the sand beach intertidal zone have a great ecological complexity, being a major trophic link among the phytoplankton, organic detritus and the higher trophic levels. Any anthropogenic disturbance that affects these organisms, such as an oil spill can cause changes in all trophic levels of coastal communities. Due to their sed
Publicado em: 2005