Eutrophication decreases ecological resilience by reducing species diversity and altering functional traits of submerged macrophytes

Author:

Cheng Chaoyue12ORCID,Chen Jun1,Su Haojie3,Chen Jianfeng3,Rao Qingyang3,Yang Jun3,Chou Qingchuan1,Wang Lantian1,Deng Xuwei1ORCID,Xie Ping13

Affiliation:

1. Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China

2. University of Chinese Academy of Sciences Beijing China

3. Institute for Ecological and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science Yunnan University Kunming China

Abstract

AbstractPositive feedback is key to producing alternative stable states and largely determines ecological resilience in response to external perturbations. Understanding the positive feedback mechanisms in macrophyte‐dominated lakes is crucial for resilience‐based management and restoration. Based on the field investigation of submerged macrophyte communities in 35 lakes in China, we found that morphological complexity (MC) and morphological plasticity (MP) are correlated with the stoichiometric homeostasis of phosphorus (HP) and are related to ecosystem structure, functioning, and stability. We also found that the positive feedback strength of lakes dominated by macrophytes is biomass‐ and diversity‐dependent. Eutrophication can decrease the community biomass by decreasing community MC, MP, and HP and the species diversity through low‐light availability, ultimately decreasing the positive feedback strength and resilience of clear water states. We argue that functional traits and species diversity should be considered to build more resilient ecosystems in future changing environment scenarios.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Publisher

Wiley

Subject

General Environmental Science,Ecology,Environmental Chemistry,Global and Planetary Change

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