Species divergence and trait convergence in experimental plant community assembly
Species divergence and trait convergence in experimental plant community assembly
复制标题
DOI：
10.1111/j.1461-0248.2005.00829.x
复制
发表时间：
2005-12-01
期刊：
影响因子：
8.8
通讯作者：
van der Putten, WH
中科院分区：
文献类型：
--
作者：
Fukami, T;Bezemer, TM;van der Putten, WH
尽管经过了几十年的研究，但生态群落是否会聚为一个由环境条件决定的共同结构，而不考虑组装历史，仍然存在争议。在这里，我们通过实验证明，答案取决于所考虑的社区组织水平。在一项为期9年的草原试验中，我们操纵了废弃耕地上的初始植物组成，随后允许自然定居。最初的组成变化导致植物群落在物种特性上保持差异，尽管这些相同的群落在物种特征上高度趋同。物种分化和性状趋同之间的这种对比不能仅用扩散限制或群落中立来解释。我们的结果表明，基于特征的集合规则和种级优先效应的同时运行驱动了群落集合，使其既具有确定性又具有历史偶然性，但在不同的群落组织水平上。
Despite decades of research, it remains controversial whether ecological communities converge towards a common structure determined by environmental conditions irrespective of assembly history. Here, we show experimentally that the answer depends on the level of community organization considered. In a 9-year grassland experiment, we manipulated initial plant composition on abandoned arable land and subsequently allowed natural colonization. Initial compositional variation caused plant communities to remain divergent in species identities, even though these same communities converged strongly in species traits. This contrast between species divergence and trait convergence could not be explained by dispersal limitation or community neutrality alone. Our results show that the simultaneous operation of trait-based assembly rules and species-level priority effects drives community assembly, making it both deterministic and historically contingent, but at different levels of community organization.