Consistently positive effect of species diversity on ecosystem, but not population, temporal stability,Ecology Letters

当前位置： X-MOL 学术 › Ecol. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Consistently positive effect of species diversity on ecosystem, but not population, temporal stability
Ecology Letters ( IF 7.6 ) Pub Date : 2021-05-17 , DOI: 10.1111/ele.13777
Qianna Xu ₁ , Xian Yang _{1,

2} , Ying Yan ₃ , Shaopeng Wang ₃ , Michel Loreau ₄ , Lin Jiang ₁

Affiliation

Despite much recent progress, our understanding of diversity–stability relationships across different study systems remains incomplete. In particular, recent theory clarified that within‐species population stability and among‐species asynchronous population dynamics combine to determine ecosystem temporal stability, but their relative importance in modulating diversity‐ecosystem temporal stability relationships in different ecosystems remains unclear. We addressed this issue with a meta‐analysis of empirical studies of ecosystem and population temporal stability in relation to species diversity across a range of taxa and ecosystems. We show that ecosystem temporal stability tended to increase with species diversity, regardless of study systems. Increasing diversity promoted asynchrony, which, in turn, contributed to increased ecosystem stability. The positive diversity–ecosystem stability relationship persisted even after accounting for the influences of environmental covariates (e.g., precipitation and nutrient input). By contrast, species diversity tended to reduce population temporal stability in terrestrial systems but increase population temporal stability in aquatic systems, suggesting that asynchronous dynamics among species are essential for stabilizing diverse terrestrial ecosystems. We conclude that there is compelling empirical evidence for a general positive relationship between species diversity and ecosystem‐level temporal stability, but the contrasting diversity–population temporal stability relationships between terrestrial and aquatic systems call for more investigations into their underlying mechanisms.

中文翻译：

物种多样性对生态系统的持续积极影响，但对种群、时间稳定性没有影响

尽管最近取得了很多进展，但我们对不同研究系统之间的多样性-稳定性关系的理解仍然不完整。特别是，最近的理论阐明了物种内种群稳定性和物种间异步种群动态共同决定了生态系统的时间稳定性，但它们在调节不同生态系统多样性-生态系统时间稳定性关系中的相对重要性仍不清楚。我们通过对生态系统和种群时间稳定性与一系列分类群和生态系统的物种多样性相关的实证研究的元分析来解决这个问题。我们表明，无论研究系统如何，生态系统时间稳定性都随着物种多样性的增加而增加。多样性的增加促进了不同步，这反过来又促进了生态系统的稳定性。即使在考虑了环境协变量（例如，降水和养分输入）的影响之后，积极的多样性-生态系统稳定性关系仍然存在。相比之下，物种多样性往往会降低陆地系统中的种群时间稳定性，但会增加水生系统中的种群时间稳定性，这表明物种之间的异步动态对于稳定多样化的陆地生态系统至关重要。我们得出的结论是，有令人信服的经验证据表明物种多样性与生态系统水平的时间稳定性之间存在普遍的正相关关系，但陆地和水生系统之间形成鲜明对比的多样性 - 种群时间稳定性关系需要对其潜在机制进行更多调查。

更新日期：2021-05-18

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11