Disturbance-mediated mammal persistence and abundance-area relationships in Amazonian forest fragments
Disturbance-mediated mammal persistence and abundance-area relationships in Amazonian forest fragments
复制标题
DOI：
10.1111/j.1523-1739.2007.00797.x
复制
发表时间：
2007-12-01
影响因子：
6.3
通讯作者：
Peres, Carlos A.
中科院分区：
文献类型：
--
作者：
Michalski, Fernanda;Peres, Carlos A.
很少有人研究热带森林破碎化和干扰对物种持久性和丰度的协同效应。在高度碎片化的亚马逊森林景观中，我们研究了森林斑块指标和森林干扰对确定中型到大型哺乳动物物种丰富度和丰度的影响。根据目击、足迹、样线普查、犰狳洞穴普查和相机诱捕，对21个森林碎片和两个连续的森林点进行了采样，范围从2到14480公顷不等。37种物种的斑块占用率从4%到所有调查的森林样地不等。森林碎片大小是物种持久性的最强预测因子，解释了物种丰富度变化的90%。信息论分析表明，碎片面积是影响哺乳动物物种总体丰富度和丰度的最重要的解释变量，其次是地表火灾，地表火灾影响了7种物种的丰度。大型哺乳动物在小于100 ha的小块中缺乏，而一些普遍存在的物种在小块中表现出高丰度。我们的研究结果强调了大型（约10000公顷）、相对未受干扰的森林斑块对最大限度地维持新热带森林哺乳动物物种的持久性和基线丰度的重要性。
Few researchers have investigated the synergistic effects of tropical forest fragmentation and disturbance on species persistence and abundance. We examined effects of both forest-patch metrics and forest disturbance in determining richness and abundance of midsized to large-bodied mammal species in a highly fragmented Amazonian forest landscape. Twenty-one forest fragments, ranging from 2 to 14,480 ha, and two continuous forest sites were sampled based on sightings, tracks, line-transect censuses, armadillo burrow censuses, and camera trapping. Patch occupancy of 37 species recorded ranged from 4% to all forest sites surveyed. Forest fragment size was the strongest predictor of species persistence, explaining 90% of the variation in species richness. Information-theoretic analysis confirmed that fragment area was the most important explanatory variable for the overall species richness and abundance of mammal species, followed by surface fires, which affected the abundance of seven species. Large mammal species were typically absent from fragments < 100 ha, whereas some ubiquitous species were favored by fragmentation, exhibiting hyperabundance in small patches. Our findings highlight the importance of large (> 10,000 ha), relatively undisturbed forest patches to maximize persistence and maintain baseline abundances of Neotropical forest mammal species.