The dual nature of metacommunity variability
The dual nature of metacommunity variability
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元社区变异性的双重本质
DOI：
10.1111/oik.08517
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发表时间：
2021
期刊：
影响因子：
3.4
通讯作者：
Tonkin, Jonathan D.
中科院分区：
文献类型：
--
作者：
Lamy, Thomas;Wisnoski, Nathan I.;Andrade, Riley;Castorani, Max C.;Compagnoni, Aldo;Lany, Nina;Marazzi, Luca;Record, Sydne;Swan, Christopher M.;Tonkin, Jonathan D.
人们对测量生态稳定性越来越感兴趣，以了解社区和生态系统如何应对大规模的全球变化。最常见的方法之一是量化群落或生态系统总属性（如总生物量）随时间的变化，称为总变异性。现在人们普遍认识到，总体变异性只是群落和生态系统的一个方面，组成变异性，即物种在群落中相对频率的变化，同样重要。最近的贡献也开始探讨在区域空间尺度上的生态稳定性，相互关联的地方社区形成metacompatibility，管理复杂的景观的一个关键概念。然而，空间生态稳定性的概念框架和措施仅侧重于总体可变性，留下了概念空白。在这里，我们解决这个差距与一个新的框架，通过空间和时间的社区和生态系统的总量和组成的变化进行量化。我们表明，组成的变化性的metacompatibility取决于当地社区之间的组成轨迹的空间同步程度。然后，我们提供了一个概念框架，其中的组成变化1）元性通过时间和2）当地社区之间的联合收割机组合成四个原型方案：空间停滞（低/低），空间同步（高/低），空间补偿（高/高）和空间补偿（低/高）。我们说明了这个框架的基础上的数值例子和一个大型藻类的metacquitality的案例研究，其中低空间同步性降低了在metacquitality规模的总生物量的变化，而掩盖高空间同步性在当地社区之间的组成轨迹。最后，我们讨论了扩散，环境异质性，物种相互作用的作用，并提出了未来的途径。我们相信，这一框架将有助于同时考虑这两个方面的变化，这是很重要的，以更好地了解生态稳定性的自然和复杂的景观，以应对环境变化。
There is increasing interest in measuring ecological stability to understand how communities and ecosystems respond to broad‐scale global changes. One of the most common approaches is to quantify the variation through time in community or ecosystem aggregate attributes (e.g. total biomass), referred to as aggregate variability. It is now widely recognized that aggregate variability represents only one aspect of communities and ecosystems, and compositional variability, the changes in the relative frequency of species in an assemblage, is equally important. Recent contributions have also begun to explore ecological stability at regional spatial scales, where interconnected local communities form metacommunities, a key concept in managing complex landscapes. However, the conceptual frameworks and measures of ecological stability in space have only focused on aggregate variability, leaving a conceptual gap. Here, we address this gap with a novel framework for quantifying the aggregate and compositional variability of communities and ecosystems through space and time. We demonstrate that the compositional variability of a metacommunity depends on the degree of spatial synchrony in compositional trajectories among local communities. We then provide a conceptual framework in which compositional variability of 1) the metacommunity through time and 2) among local communities combine into four archetype scenarios: spatial stasis (low/low), spatial synchrony (high/low), spatial asynchrony (high/high) and spatial compensation (low/high). We illustrate this framework based on numerical examples and a case study of a macroalgal metacommunity in which low spatial synchrony reduced variability in aggregate biomass at the metacommunity scale, while masking high spatial synchrony in compositional trajectories among local communities. Finally, we discuss the role of dispersal, environmental heterogeneity, species interactions and suggest future avenues. We believe this framework will be helpful for considering both aspects of variability simultaneously, which is important to better understand ecological stability in natural and complex landscapes in response to environmental changes.
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发表时间：
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期刊：
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