Endemics-area relationships: The influence of species dominance and spatial aggregation
Endemics-area relationships: The influence of species dominance and spatial aggregation
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DOI：
10.1890/02-3096
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发表时间：
2003-11-01
期刊：
影响因子：
4.8
通讯作者：
Ostling, A
中科院分区：
文献类型：
--
作者：
Green, JL;Ostling, A
特有物种的空间分布模式是确定保护优先事项和估计由于栖息地丧失而导致的灭绝率的核心。我们使用定量模型来隔离相对物种多度和同种空间分布对特有种-面积关系的影响。利用已发表的热带雨林群落的丰度数据，我们应用这些模型来说明物种丰度分布和物种空间分布如何对总的和特有的物种多样性模式产生显着不同的影响。一个区域内优势度和同种聚集度的增加会降低较小取样次区域的物种多样性总量，但会增加次区域特有物种多样性。我们的研究结果表明，生物或非生物的力量有助于区域尺度的物种优势和同种集群可能会增加栖息地丧失的风险。
Patterns in the spatial distribution of endemic species are central to setting conservation priorities and estimating extinction rates due to habitat loss. We use quantitative models to isolate the effects of relative species abundances and conspecific spatial distributions on the endemics-area relationship. Using published abundance data from a tropical rain forest community, we apply these models to illustrate how species abundance distributions and species spatial distributions have a strikingly different influence on total and endemic species diversity patterns, respectively. Increased dominance and conspecific aggregation in a region will act to decrease the total species diversity of smaller sampled subregions, but to increase subregional endemic species diversity. Our results suggest that biotic or abiotic forces contributing to regional-scale species dominance and conspecific clustering may increase the risk of extinctions under habitat loss.