Diversity of carbon cycle-linked phyllosphere microorganisms: A key driver of CO_(2) flux in macrophyte-dominated aquatic systems

作     者：Shangsheng Sun Zengliang Jian Qingyang Rao Jianfeng Chen Misha Zhong Yihan Wang Yuwei Wang Jun Chen Ping Xie Haojie Su 

作者机构：Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceYunnan UniversityKunming650500China Donghu Experimental Station of Lake EcosystemsInstitute of HydrobiologyChinese Academy of SciencesWuhan430072China Institute of International Rivers and Eco-SecurityYunnan UniversityKunming650500China 

出 版 物：《Water Biology and Security》 (水生生物与安全（英文）)

年 卷 期：2024年第3卷第4期

页      面：102-112页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(92251304 32371644) Scientific Research and Innovation Project of Postgraduate Students in the Academic Degree of Yunnan University(KC-23233782) 

主　　题：Macrophyte-dominated lake Phyllosphere microorganisms Functional prediction CO_(2)flux 

摘      要：Planktonic microorganisms have been recognized as important components in biogeochemical cycling in ***,research into the impact of phyllosphere microorganisms,particularly those involved in carbon cycling,on CO_(2) fluxes in macrophyte-dominated lakes within the context of global environmental changes remains ***,by employing high-throughput sequencing techniques,we experimentally tested how nutrient enrichment,top-down effects of fish and increases in dissolved organic carbon(DOC)affect CO_(2) exchange flux at the water-air interface by altering the community structure and functioning of phyllosphere bacteria on *** found that our mesocosm ecosystems exhibited a net absorption of CO_(2),but nutrient enrichment significantly decreased the absorption *** tests and multiple regression modeling also showed that eutrophication-associated parameters(total nitrogen,total phosphorus and ammonium nitrogen),pH,and extinction coefficient were the key drivers influencing abundance of phyllosphere functional *** addition,these experimental treatments significantly altered the composition,diversity and co-occurrence networks of carbon cyclingassociated phyllosphere microorganisms,which impacted the CO_(2) *** equation models and linear regression further showed that the Shannon Index of phyllosphere functional microorganisms related to carbon cycling(rather than plant volume inhabited-PVI)had a significant positive impact on CO_(2) *** means that environmental changes—especially eutrophication—may hinder carbon sequestration by decreasing the diversity of phyllosphere microorganisms rather than reducing the abundance of submerged *** study increases our understanding of carbon cycling processes in aquatic environments from a management perspective by emphasizing the importance of protecting the diversity of phyllosphere microorganisms in macrophyte-dominated lakes.