Santos-Filho M, Silva D J da, Sanaiotti T M
Instituto Nacional de Pesquisa da Amazônia, Manaus, AM, Brazil, 69060-001.
Braz J Biol. 2008 Nov;68(4):703-10. doi: 10.1590/s1519-69842008000400004.
A community of small mammals was studied in seasonal semideciduous submontane forest in the state of Mato Grosso, Brazil. This study evaluated the use of edge and matrix pasture, by different small mammal species. Overall, 31 areas were studied, with a total sampling effort of 33,800 trap x nights. Only seven of the 25 species captured in the study sites were able to use the pasture matrix; we classified these species as generalists. Fourteen species were found to be intermediate in habits, being able to use forest edges. We found only four species habitat specialists, occurring only on transect lines in the interior of the fragment, at least 150 m from the edge. Transects located in the pasture matrix and 50 m from the edge had significantly lower species richness and abundance than transects located in the fragment edge or in the interior of the fragment. All transects located within the fragment had similar species richness and abundance, but transects located 50 m from the edge had slightly lower, but non-significant, species richness than transects located 100 m apart from edges. Rarefaction curves demonstrated that only medium-sized fragments (100-300 ha) reached an asymptote of species accumulation. The other areas require further sampling, or more sampling transect, before species accumulation curves stabilize, due to a continued increase in species number.
在巴西马托格罗索州的季节性半落叶亚山地森林中，对小型哺乳动物群落进行了研究。本研究评估了不同小型哺乳动物物种对边缘和基质牧场的利用情况。总体而言，共研究了31个区域，总采样工作量为33800个诱捕器×夜。在研究地点捕获的25个物种中，只有7个能够利用牧场基质；我们将这些物种归类为通才。发现有14个物种习性介于两者之间，能够利用森林边缘。我们只发现了4个物种是栖息地专家，仅出现在片段内部距离边缘至少150米的样线上。位于牧场基质且距离边缘50米的样线的物种丰富度和丰度显著低于位于片段边缘或片段内部的样线。片段内的所有样线的物种丰富度和丰度相似，但距离边缘50米的样线的物种丰富度略低于距离边缘100米的样线，但差异不显著。稀疏曲线表明，只有中型片段（100 - 300公顷）达到了物种积累的渐近线。由于物种数量持续增加，其他区域在物种积累曲线稳定之前需要进一步采样或更多的采样样线。
