Ecological changes in recent land-bridge islands in French Guiana, with emphasis on vertebrate communities
Ecological changes in recent land-bridge islands in French Guiana, with emphasis on vertebrate communities
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DOI：
10.1016/s0006-3207(99)00091-9
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发表时间：
1999-12-01
影响因子：
5.9
通讯作者：
Pons, JM
中科院分区：
文献类型：
--
作者：
Cosson, JF;Ringuet, S;Pons, JM
1993年，在法属圭亚那发起了一个多学科项目，调查热带雨林破碎化对一个水电站形成的陆桥岛屿的影响（圣尤金破碎化项目）。这项研究的主要重点是记录脊椎动物群体的变化，包括蜥蜴、鸟类、不飞行的小型哺乳动物、蝙蝠和灵长类动物，这些动物在传播能力上有明显的差异。在这里，我们总结了前4年的研究结果SEFP（1年前的碎片化，3年后的碎片化），比较岛屿与附近的连续森林的控制地块。我们的研究结果表明，森林破碎化迅速修改脊椎动物的多样性，无论物种的能力，分散在水中。岛屿上存在的物种并不代表隔离前存在的物种的随机样本。相反，一套共同的物种已迅速成为每个岛屿上的主导，这些物种具有以下生态特征：（1）它们在其行会中表现出一些最大的体型，（2）它们在栖息地和食物需求方面是通才，（3）它们在未受干扰的森林中自然丰富，（4）它们有广泛的地理范围宠物仅限于热带雨林。这些结果被解释在光的雨林破碎化的其他研究。(C)1999 Elsevier Science Ltd.保留所有权利。
In 1993 a multidisciplinary project investigating the effects of tropical rainforest fragmentation on land-bridge islands created by a hydroelectric reservoir was initiated in French Guiana (the Saint Eugene Fragmentation Project, SEFP). The main focus of the study is documenting changes in vertebrate groups, including lizards, birds, non-flying small mammals, bats and primates, that have marked differences in dispersal capacities. Here we summarize results of the first 4 years of research on SEFP (1 year pre-fragmentation, 3 years post-fragmentation), comparing islands with nearby control plots in continuous forest. Our results suggest that forest fragmentation has rapidly modified vertebrate diversity, regardless of the ability of species to disperse over water. Species present on islands do not represent a random sample of those present before isolation. Rather, a common suite of species has rapidly become dominant on each island, and these species share the following ecological traits: (1) they exhibit some of the largest body sizes in their guild, (2) they are generalists in habitat and food requirements, (3) they are naturally abundant in undisturbed forests, and (4) they have a wide geographic range pet are restricted to tropical rainforest. These results are interpreted in light of other studies of rainforest fragmentation. (C) 1999 Elsevier Science Ltd. All rights reserved.