Forest Fragmentation
Mostrando 13-24 de 207 artigos, teses e dissertações.
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13. Activity patterns of frugivorous phyllostomid bats in an urban fragment in southwest Amazonia, Brazil
ABSTRACT: The habitat fragmentation modifies the pattern of animal activity. This study aimed to determine the activity pattern of frugivorous bat species in an urban forest fragment in southwestern Amazonia. The study was conducted from August 2013 to September 2014 with 10 mist nets (9m x 2.5m), opened at ground level throughout all the night and totaling
Iheringia, Sér. Zool.. Publicado em: 11/06/2018
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14. Bird diversity along a gradient of fragmented habitats of the Cerrado
ABSTRACT Understanding the factors that affect biodiversity is of central interest to ecology, and essential to species conservation and ecosystems management. We sampled bird communities in 17 forest fragments in the Cerrado biome, the Central-West region of Brazil. We aimed to know the communities structure pattern and the influence of geographical distanc
An. Acad. Bras. Ciênc.. Publicado em: 11/12/2017
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15. Floral and reproductive biology of Alcantarea nahoumii (Bromeliaceae), a vulnerable endemic species of the Atlantic Forest
ABSTRACT Alcantarea nahoumii occurs exclusively in the state of Bahia, Brazil, and is classified as vulnerable due to deforestation and frequent fires in the region. Knowledge of floral and reproductive biology is fundamental to understanding ecological interactions, as well as the reproductive success of plant species. The objective of this study was to eva
Acta Bot. Bras.. Publicado em: 2017-12
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16. Application of Georadar in Areas with Different Vegetation Cover
ABSTRACT The Atlantic Forest degradation and fragmentation imposes the need for soil and vegetation assessments in order to estimate the environmental vulnerability of the remnants. The objective of this study was to evaluate the georadar applications in areas of Atlantic Forest under different forms of use in Pinheiral, State of Rio de Janeiro, Brazil, thro
Floresta Ambient.. Publicado em: 08/05/2017
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17. Diversity and conservation status of Aegla spp. (Anomura, Aeglidae): an update
Abstract The speciose genus Aegla Leach, 1820 is the only valid extant genus of the anomuran family Aeglidae, bearing 83 known species. This diversity may be even greater since there is some evidence for cryptic speciation. The genus is endemic to southern South America, occurring in freshwater habitats. We assessed the conservation status of 82 species of A
Nauplius. Publicado em: 27/04/2017
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18. Development and characterization of microsatellite loci for the Neotropical orchid Trichocentrum pumilum
Abstract Studies of genetic diversity and structure are key elements in designing effective in situ and ex situ management plans, especially for species experiencing forest fragmentation. To investigate the level of genetic diversity in populations of Trichocentrum pumilum, eight polymorphic microsatellite loci were developed and used for genotyping 96 speci
Crop Breed. Appl. Biotechnol.. Publicado em: 2016-12
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19. Análisis panbiogeográfico del género Galianthe subgénero Ebelia (Rubiaceae)
Abstract Galianthe (Rubiaceae: Spermacoceae) is a genus composed by the subgenus Galianthe and Ebelia, the latter includes 11 Neotropical species with a center of diversity located in Brazil. The panbiogeographic analysis emphasizes the importance of the spatial dimension of biodiversity to generate a better understanding of both, evolutionary patterns and p
Rodriguésia. Publicado em: 2016-06
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20. Improving collection efforts to avoid loss of biodiversity: lessons from comprehensive sampling of lycophytes and ferns in the subtropical Atlantic Forest
ABSTRACT Estimating species richness with herbarium data and new collections allows us to understand the distribution of diversity. We investigated the accuracy of lycophyte and fern sampling along a vegetation gradient in the subtropical Atlantic Forest in southern Brazil. We compiled lycophyte and fern collection metadata and estimated species richness and
Acta Bot. Bras.. Publicado em: 15/03/2016
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21. The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions
Edge effects impact species richness and composition as a result of environmental changes caused by fragmentation. This study analyzed edge effects on a community of terrestrial ferns and lycophytes in an Araucaria forest in Brazil at sites subjected to differing edge conditions: (1) a site bordering a road running through the interior of a conservation unit
Acta Bot. Bras.. Publicado em: 2015-06
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22. Dung beetle (Coleoptera, Scarabaeidae) assemblage of a highly fragmented landscape of Atlantic forest: from small to the largest fragments of northeastern Brazilian region
Human activities in tropical forests are the main causes of forest fragmentation. According to historical factor in deforestation processes, forest remnants exhibit different sizes and shapes. The aim of the present study was to evaluate the dung beetle assemblage on fragments of different degree of sizes. Sampling was performed during rainy and dry season o
Rev. Bras. entomol.. Publicado em: 2015-06
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23. Structure and floristic diversity of remnant semideciduous forest under varying levels of disturbance
The perturbation of Neotropical forests generates large disturbances in biological communities. The species that suffer least from the resulting habitat fragmentation are the pioneers, because they possess greater ability to inhabit disturbed environments. Therefore, it is expected that species diversity will be greater in areas subjected to intermediate dis
Acta Bot. Bras.. Publicado em: 2014-12
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24. Demography of the endangered tree species Ocotea porosa (Lauraceae) along a gradient of forest disturbance in southern Brazil
Ocotea porosa (Ness) Barroso (Lauraceae), a typical tree of the southern Atlantic Forest in Brazil, was heavily exploited for timber in the last century. With the aim of examining the status of the remaining populations, we surveyed five forest fragments in the state of Paraná, in southern Brazil, and evaluated whether disturbances caused by selective loggi
Acta Bot. Bras.. Publicado em: 2014-12