Distinguishing the importance between habitat specialization and dispersal limitation on species turnover.
Distinguishing the importance between habitat specialization and dispersal limitation on species turnover.
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区分栖息地专业化和扩散限制对物种周转的重要性
DOI：
10.1002/ece3.745
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发表时间：
2013-09
影响因子：
2.6
通讯作者：
Duan, Renyan
中科院分区：
文献类型：
--
作者：
Wang, Shixiong;Wang, Xiaoan;Guo, Hua;Fan, Weiyi;Lv, Haiying;Duan, Renyan
了解什么控制着群落集会和生物多样性的维护是生态学的一个核心问题，但一直是一个持续的争论。一个关键问题是栖息地专业化（生态位组装）和扩散限制（扩散组装）的相对重要性。在中国西北部的黄土高原中部，我们利用变异划分研究了辽东栎（Quercus wutaishanica）森林中观察到的和随机组合之间的物种更替有何不同，以及这种差异如何受到生境专业化和扩散限制的影响。结果表明，基于个体随机化的预期物种周转率显着低于观察值（P < 0.01）。营业额偏差显着取决于环境和地理距离（P < 0.05）。环境和空间变量显着解释了所有三层约 40% 的物种组成变化（P < 0.05）。然而，它们的贡献因森林层而异；草本层和灌木层受环境因素主导，而冠层则受空间因素主导。我们的结果强调了综合模型的重要性，该模型整合了扩散和生态位组装的影响，以了解群落组装。然而，即使在恶劣的环境下，栖息地专业化（生态位组装）也可能并不总是群落组装的主导过程。群落组装可能以性状依赖的方式进行（例如本研究中的森林层）。因此，考虑更多的物种特征将增强我们对推断的组装机制的信心。
Understanding what governs community assembly and the maintenance of biodiversity is a central issue in ecology, but has been a continuing debate. A key question is the relative importance of habitat specialization (niche assembly) and dispersal limitation (dispersal assembly). In the middle of the Loess Plateau, northwestern China, we examined how species turnover in Liaodong oak (Quercus wutaishanica) forests differed between observed and randomized assemblies, and how this difference was affected by habitat specialization and dispersal limitation using variation partitioning. Results showed that expected species turnover based on individual randomization was significantly lower than the observed value (P < 0.01). The turnover deviation significantly depended on the environmental and geographical distances (P < 0.05). Environmental and spatial variables significantly explained approximately 40% of the species composition variation at all the three layers (P < 0.05). However, their contributions varied among forest layers; the herb and shrub layers were dominated by environmental factors, whereas the canopy layer was dominated by spatial factors. Our results underscore the importance of synthetic models that integrate effects of both dispersal and niche assembly for understanding the community assembly. However, habitat specialization (niche assembly) may not always be the dominant process in community assembly, even under harsh environments. Community assembly may be in a trait-dependent manner (e.g., forest layers in this study). Thus, taking more species traits into account would strengthen our confidence in the inferred assembly mechanisms.
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影响因子：
8.8
作者：
Gravel, D;Canham, CD;Messier, C
通讯作者：
Messier, C
影响因子：
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作者：
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DOI：
10.1073/pnas.0704350104
发表时间：
2007-10-30
影响因子：
11.1
作者：
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通讯作者：
Chase, Jonathan M.
影响因子：
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作者：
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