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Habitat structure and small mammals abundances in one semiarid landscape in the Brazilian Caatinga Zoologia
Freitas,Rodrigo R.; Rocha,Pedro Luís B. da; Simões-Lopes,Paulo César.
Studies conducted under a major project sponsored by the Brazilian Academy of Sciences in the 1970's concluded that the small mammal fauna of the semiarid Caatinga region of Brazil is impoverished and highly restricted to mesic granite outcroppings due to the lack of water conserving physiological capabilities in its species. This work focuses the abundance of small mammals in five typical Caatinga habitats. Indirect gradient analysis shows that three theoretical environmental variables explain most of the variance present in the community abundance matrix. Direct analysis of gradients show that none of these variables is highly correlated to availability of granite outcroppings. Our data also suggest that the abundances in Caatinga are not particularly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptability; Capture success; Electivity; Gradient analysis; Richness.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100015
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Influence of camera-trap sampling design on mammal species capture rates and community structures in southeastern Brazil Biota Neotropica
Srbek-Araujo,Ana Carolina; Chiarello,Adriano Garcia.
The distribution of species and population attributes are critical data for biodiversity conservation. As a tool for obtaining such data, camera traps have become increasingly common throughout the world. However, there are disagreements on how camera-trap records should be used due to imperfect species detectability and limitations regarding the use of capture rates as surrogates for abundance. We evaluated variations in the capture rates and community structures of mammals in camera-trap surveys using four different sampling designs. The camera traps were installed on internal roads (in the first and fourth years of the study), at 100-200 m from roads (internal edges; second year) and at 500 m from the nearest internal road (forest interior; third year)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Capture success; Detection bias; Detection probability; Mammal inventory.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200051
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