Evolutionary emergence of alternative stable states in shallow lakes,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.)

Evolutionary emergence of alternative stable states in shallow lakes
Ecology Letters ( IF 7.6 ) Pub Date : 2023-03-09 , DOI: 10.1111/ele.14180
Alice Nadia Ardichvili ₁ , Nicolas Loeuille ₁ , Vasilis Dakos _{1,

2}

Affiliation

Ecosystems under stress may respond abruptly and irreversibly through tipping points. Although mechanisms leading to alternative stable states are much studied, little is known about how such ecosystems could have emerged in the first place. We investigate whether evolution by natural selection along resource gradients leads to bistability, using shallow lakes as an example. There, tipping points occur between two alternative states dominated by either submersed or floating macrophytes depending on nutrient loading. We model the evolution of macrophyte depth in the lake, identify the conditions under which the ancestor population diversifies and investigate whether alternative stable states dominated by different macrophyte phenotypes occur. We find that eco-evolutionary dynamics may lead to alternative stable states, but under restrictive conditions. Such dynamics require sufficient asymmetries in the acquisition of both light and nutrient. Our analysis suggests that competitive asymmetries along opposing resource gradients may allow bistability to emerge by natural selection.

中文翻译：

浅湖中替代稳定状态的进化出现

压力下的生态系统可能会通过临界点做出突然且不可逆转的反应。尽管对导致替代稳定状态的机制进行了大量研究，但人们对这种生态系统最初是如何出现的知之甚少。我们以浅水湖泊为例，调查沿资源梯度的自然选择进化是否会导致双稳态。在那里，临界点出现在两种不同的状态之间，这两种状态分别由沉水或漂浮的大型植物主导，具体取决于养分负荷。我们对湖中大型植物深度的演变进行建模，确定祖先种群多样化的条件，并研究是否会出现由不同大型植物表型主导的替代稳定状态。我们发现生态进化动力学可能导致替代稳定状态，但在限制条件下。这种动态需要在获取光和养分方面有足够的不对称性。我们的分析表明，沿着相反的资源梯度的竞争不对称可能允许通过自然选择出现双稳态。

更新日期：2023-03-09

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南