Interactive effects of warming and eutrophication on zooplankton could reverse the stoichiometric mismatch with phytoplankton  

作　　者：Konghao Zhu Huan Zhang Peiyu Zhang Panpan Wang Hailu Li Mingjun Feng Huan Wang Hongxia Wang Min Zhang Jun Xu 

机构地区：[1]State Key Laboratory of Freshwater Ecology and Biotechnology of China,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan,430072,China [2]College of Fisheries,Huazhong Agricultural University,Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt,Ministry of Education,Hubei Provincial Engineering Laboratory for Pond Aquaculture,Wuhan,China [3]Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education,Nanchang University,Nanchang,China [4]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Water Biology and Security》2023年第4期45-52,共8页水生生物与安全（英文）

基　　金：supported by the National Natural Science Foundation of China[grant numbers 32171515,31800389];the Hundred-Talent Program of the Chinese Academy of Sciences;the International Cooperation Project of the Chinese Academy of Sciences[grant numbers 152342KYSB20190025].

摘　　要：The core ecosystem functioning(e.g.trophic transfer efficiency)is at risk of being disrupted by the growing mismatch between nutrient content of primary producers and nutrient demand of grazing consumers.Ecological stoichiometry provides a conceptual framework that explains this trophic interaction using C,N and P elemental composition across trophic levels.In light of ongoing climate change and eutrophication,previous studies have raised concerns regarding the growing stoichiometric mismatch between phytoplankton and zooplankton,given the stoichiometric plasticity of phytoplankton.However,there is currently little conclusive evidence on the stoichiometric mismatch from a dual perspective of phytoplankton and zooplankton.To address this,we conducted a mesocosm experiment to investigate the separate and combined effects of climate warming(a constant increase of t3.5C plus heat waves)and eutrophication(nutrient addition)on stoichiometric mismatch between phytoplankton and zooplankton by examining stoichiometric changes in both communities.We observed a growing trend in stoichiometric mismatches when warming or nutrient addition acted individually,which was mediated by the increase in nutrient demand(N,P elements)of zooplankton growth.However,when these stressors acted jointly,the mismatches were reversed.This could be because climate warming and eutrophication combined would lead to changes in species composition,which accordingly reshaped the stoichiometric composition at the community level.These results illustrate the need of stoichiometric mismatches for understanding the implication of global change on trophic interactions and ecosystem functioning,requiring consideration not only of cross-trophic levels but also of compositional changes within communities.

关 键 词：Climate warming Ecological stoichiometry EUTROPHICATION Stoichiometric mismatch Trophic interaction 

分 类 号：Q178.1[生物学—水生生物学]