Functional traits and environmental filtering drive community assembly in a species-rich tropical system
Functional traits and environmental filtering drive community assembly in a species-rich tropical system
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DOI：
10.1890/08-1449.1
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发表时间：
2010-02-01
期刊：
影响因子：
4.8
通讯作者：
Poorter, Lourens
中科院分区：
文献类型：
--
作者：
Lebrija-Trejos, Edwin;Perez-Garcia, Eduardo A.;Poorter, Lourens
群落组装的机械模型表明，生物和非生物过滤器通过对其功能特征的选择来约束物种的建立。预测这种组装过程受到阻碍，因为很少有研究直接纳入环境测量，并将LIP从物种水平扩展到群落水平，而且因为功能特征的重要性与环境有关。在物种丰富的热带系统中，我们通过测量次生林的结构、环境条件和物种特征来分析群落聚集。我们发现，正如假设的那样，群落结构塑造了当地的环境，这种环境与更新群落中最成功的物种的特征之间存在着密切的关系。通径分析和多元回归分析表明，温度和调节温度的叶片性状是群落分化的最重要因素。对森林更新群落、幼林群落和成年群落的特征组成进行了比较，结果表明群落聚集格局一致。这些结果使LIS能够确定干林群落组成的主要功能特征和环境因素，并证明环境过滤是群落组成的一个可预测和基本的过程，即使在热带森林这样的复杂系统中也是如此。
Mechanistic models of community assembly state that biotic and abiotic filters constrain species establishment through selection on their functional traits. Predicting this assembly process is hampered because few studies directly incorporate environmental measurements and scale LIP from species to community level and because the functional traits' significance is environment dependent. We analyzed community assembly by measuring structure, environmental conditions, and species traits of secondary forests in a species-rich tropical system. We found, as hypothesized, that community structure shaped the local environment and that strong relationships existed between this environment and the traits of the most Successful species of the regeneration communities. Path and multivariate analyses showed that temperature and leaf traits that regulate it were the most important factors of community differentiation. Comparisons between the trait composition of the forest's regeneration, juvenile, and adult communities showed a Consistent community assembly pattern. These results allowed LIS to identify the major functional traits and environmental factors involved in the assembly of dry-forest Communities and demonstrate that environmental filtering is a predictable and fundamental process of community assembly, even in a complex system such as a tropical forest.