Extinction rates under nonrandom patterns of habitat loss

被引:119
作者
Seabloom, EW
Dobson, AP
Stoms, DM
机构
[1] Natl Ctr Ecol Anal & Synth, Santa Barbara, CA 93101 USA
[2] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA
[3] Univ Calif Santa Barbara, Inst Computat Earth Syst Sci, Santa Barbara, CA 93106 USA
关键词
habitat-conversion; California; species-area; conservation; biodiversity;
D O I
10.1073/pnas.162064899
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Most models that examine the effects of habitat conversion on species extinctions assume that habitat conversion occurs at random. This assumption allows predictions about extinction rates based on the species-area relationship. We show that the spatially aggregated nature of habitat conversion introduces a significant bias that may lead species-loss rates to exceed those predicted by species-area curves. Correlations between human activity and major compositional gradients, or species richness, also after predicted species extinction rates. We illustrate the consequences of nonrandom patterns of habitat conversion by using a data set that combines the distribution of native vascular plants with human activity patterns in California.
引用
收藏
页码:11229 / 11234
页数:6
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