Brown Mike, Dinsmore James J
Department of Animal Ecology, Iowa State University, 50011, Ames, IA, USA.
Oecologia. 1988 Apr;75(3):426-429. doi: 10.1007/BF00376947.
Species-area data from a study of marsh birds are used to test five predictions generated by the equilibrium theory of island biogeography. Three predictions are supported: we found a significant species-area relationship, a non-zero level of turnover, and a variance-mean ratio of 0.5. One prediction is rejected: the extinction rates were not greater on small islands. The results of one test are equivocal: the number of species on each island was not always the same. As Gilbert (1980) suggests, a strong species-area relationship alone does not validate the theory. The avian communities we studied were on habitat islands, not true islands, and underwent complete extinction annually. Thus caution must be used before applying the theory to these and other habitat islands.
一项关于沼泽鸟类的研究中的物种-面积数据被用于检验由岛屿生物地理学平衡理论所产生的五个预测。三个预测得到了支持：我们发现了显著的物种-面积关系、非零的周转率水平以及0.5的方差-均值比。一个预测被否定：小岛上的灭绝率并不更高。一项检验的结果不明确：每个岛屿上的物种数量并非总是相同。正如吉尔伯特（1980年）所指出的，仅靠强大的物种-面积关系并不能证实该理论。我们所研究的鸟类群落位于栖息地岛屿而非真正的岛屿上，并且每年都会经历完全灭绝。因此，在将该理论应用于这些以及其他栖息地岛屿之前必须谨慎。
