Hui Cang, McGeoch Melodie A
Centre for Invasion Biology, Department of Mathematical Sciences, Stellenbosch University, Matieland 7602, South Africa; and African Institute for Mathematical Sciences, Muizenberg 7945, South Africa.
Am Nat. 2014 Nov;184(5):684-94. doi: 10.1086/678125. Epub 2014 Sep 24.
Patterns in species incidence and compositional turnover are central to understanding what drives biodiversity. Here we propose zeta (ζ) diversity, the number of species shared by multiple assemblages, as a concept and metric that unifies incidence-based diversity measures, patterns, and relationships. Unlike other measures of species compositional turnover, zeta diversity partitioning quantifies the complete set of diversity components for multiple assemblages, comprehensively representing the spatial structure of multispecies distributions. To illustrate the application and ecological value of zeta diversity, we show how it scales with sample number, grain, and distance. Zeta diversity reconciles several different biodiversity patterns, including the species accumulation curve, the species-area relationship, multispecies occupancy patterns, and scaling of species endemism. Exponential and power-law forms of zeta diversity are associated with stochastic versus niche assembly processes. Zeta diversity may provide new insights on biodiversity patterns, the processes driving them, and their response to environmental change.
物种发生率和组成周转率的模式是理解生物多样性驱动因素的核心。在此，我们提出ζ多样性，即多个群落共享的物种数量，作为一个统一基于发生率的多样性度量、模式及关系的概念和指标。与其他物种组成周转率度量不同，ζ多样性划分量化了多个群落的完整多样性组成集，全面地代表了多物种分布的空间结构。为说明ζ多样性的应用和生态价值，我们展示了它如何随样本数量、粒度和距离而变化。ζ多样性协调了几种不同的生物多样性模式，包括物种累积曲线、物种 - 面积关系、多物种占用模式以及物种特有性的尺度变化。ζ多样性的指数形式和幂律形式分别与随机组装过程和生态位组装过程相关联。ζ多样性可能为生物多样性模式、驱动这些模式的过程及其对环境变化的响应提供新的见解。
