An integrative framework for stochastic, size-structured community assembly
An integrative framework for stochastic, size-structured community assembly
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随机、规模结构的社区组装的综合框架
DOI：
10.1073/pnas.0813041106
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Jessica L. Green
中科院分区：
文献类型：
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作者：
James P. O'Dwyer;Jeffrey K. Lake;Annette Ostling;Van M. Savage;Van M. Savage;Jessica L. Green;Jessica L. Green
我们提出了一个理论框架来描述随机的、规模结构的群落组装，并使用该框架进行群落层面的生态预测。我们的模型可以被认为是通过结合体型变化和生长动态，在中性生物多样性理论中添加生物现实主义，并允许人口统计率取决于个体的体型。我们发现物种丰度分布 (SAD) 对模型中的尺寸结构细节不敏感，这表明 SAD 不能很好地指示尺寸相关过程。我们还推导了物种生物量分布 (SBD)，并发现 SBD 的形式取决于潜在的尺寸结构。这导致了测试模型的多个、相互交织的生态预测的处方，并提供了传统 SAD 的替代方案与某些生态过程更紧密联系的证据。最后，我们描述了如何扩展我们的框架以对更一般类型的社区结构进行预测。
We present a theoretical framework to describe stochastic, size-structured community assembly, and use this framework to make community-level ecological predictions. Our model can be thought of as adding biological realism to Neutral Biodiversity Theory by incorporating size variation and growth dynamics, and allowing demographic rates to depend on the sizes of individuals. We find that the species abundance distribution (SAD) is insensitive to the details of the size structure in our model, demonstrating that the SAD is a poor indicator of size-dependent processes. We also derive the species biomass distribution (SBD) and find that the form of the SBD depends on the underlying size structure. This leads to a prescription for testing multiple, intertwined ecological predictions of the model, and provides evidence that alternatives to the traditional SAD are more closely tied to certain ecological processes. Finally, we describe how our framework may be extended to make predictions for more general types of community structure.