测量生态群落的时间周转
Measuring temporal turnover in ecological communities
摘要：
为应对气候变化、入侵物种和新生态系统的出现而进行的范围迁移突出了群落组成的时间更替作为人类世全球变化的一个基本组成部分的重要性。时间周转通常使用最初开发用于捕获空间变化的各种度量来量化。然而，时间营业额是单向的社区动态过程，如人口增长，殖民和本地灭绝的结果。在这里，我们开发了一个基于社区动态的框架，并提出了一个新的时间周转措施。一个河口鱼类群落的模拟研究和分析都清楚地表明，我们提出的营业额的措施提供了额外的见解相对于基于空间背景的指标。我们的方法揭示了社区营业额是否是由于社区组成或社区丰度的变化，并确定了物种和/或环境因素，负责任何变化。
英文摘要：
Range migrations in response to climate change, invasive species and the emergence of novel ecosystems highlight the importance of temporal turnover in community composition as a fundamental part of global change in the Anthropocene. Temporal turnover is usually quantified using a variety of metrics initially developed to capture spatial change. However, temporal turnover is the consequence of unidirectional community dynamics resulting from processes such as population growth, colonisation and local extinction. Here, we develop a framework based on community dynamics, and propose a new temporal turnover measure. A simulation study and an analysis of an estuarine fish community both clearly demonstrate that our proposed turnover measure offers additional insights relative to spatial-context-based metrics. Our approach reveals whether community turnover is due to shifts in community composition or in community abundance, and identifies the species and/or environmental factors that are responsible for any change.
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