超越物种-面积曲线：多样性与面积关系的理论方法

中文摘要 AI 辅助

物种-面积曲线描述物种数量随面积的变化关系，长期以来被用于理解生物多样性及指导保护工作。尽管物种数量的理解很重要，但它忽略了每个物种的种群规模信息。本研究探讨不同多样性指数（如辛普森指数、香农指数）对应的有效物种数（也称为希尔数）与面积的关系。利用此前用于研究物种-面积曲线的空间中性模型，结合理论推导与模拟分析，结果表明：当面积足够大时，有效物种数与面积呈线性关系；而在面积较小时，二者则呈现幂律关系。

英文摘要

Species area curves, which describe the number of species present as a function of area, have long been used to understand biodiversity and inform conservation efforts. While understanding the number of species is important, it leaves out information about the population sizes of each species. In this work, we examine the relationship between the effective number of species from different diversity indices, like Simpson's index and the Shannon index, and area. These effective number of species are also referred to as Hill numbers. Using a spatial and neutral model that has previously been used to understand species area curves, we show through a combination of theory and simulations that the relationship between the effective number of species and area is linear when the area is sufficiently large and resembles a power law for smaller areas.

发表机构

• Princeton University（普林斯顿大学）

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