Testing the keystone community concept: effects of landscape, patch removal, and environment on metacommunity structure.
Testing the keystone community concept: effects of landscape, patch removal, and environment on metacommunity structure.
复制标题
测试关键群落概念：景观、斑块去除和环境对元群落结构的影响。
DOI：
10.1002/ecy.2041
复制
发表时间：
2018
期刊：
影响因子：
4.8
通讯作者：
M. Leibold
中科院分区：
文献类型：
--
作者：
Emlyn J. Resetarits;S. Cathey;M. Leibold
虽然区域过程对局部斑块的影响已经得到了很好的研究，但局部斑块及其空间排列对区域过程的影响可能是复杂的。一个有趣的想法是基石社区概念（KCC）；这表明，与其他补丁相比，可能有一些补丁对元社区有不成比例的巨大影响。我们通过复制原生生物微观元群落和单斑块去除实验来测试KCC。去除单个斑块对群落的平均丰富度、均匀度和生物量没有影响，但确实使元群落受当地环境条件的影响显著减少，受随机因素相关的空间效应的影响显著增加。总的来说，我们的研究结果表明，局部斑块去除可以对结构过程产生很大的区域影响，但表明需要更多的实验来找到关键群落的证据。
Although the influence of regional processes on local patches is well studied, the influence of local patches and their spatial arrangement on regional processes is likely to be complex. One interesting idea is the keystone community concept (KCC); this posits that there may be some patches that have a disproportionately large effect on the metacommunity compared to other patches. We experimentally test the KCC by using replicate protist microcosm metacommunities with single-patch removals. Removing single patches had no effect on average community richness, evenness and biomass of our metacommunities, but did cause metacommunities to be assembled significantly less by local environmental conditions and more by spatial effects related to stochastic factors. Overall our results show that local patch removal can have large regional effects on structural processes, but indicate that more experiments are needed to find evidence of keystone communities.