Author:
Peng Ziqi,Wang Pandeng,Luo Xiaoqing,Deng Qiqi,Yang Ziwen,Wu Jiaxue,Xian Wendong,Yan Weicong,Mou Xiaozhen,Yuan Yang,Li Wenjun,Li Jialing
Abstract
AbstractCoastal ecosystems are an important region for biogeochemical cycling, are a hotspot of anthropogenic disturbance and play a crucial role in global carbon cycling through the metabolic activities of bacterioplankton. Bacterioplankton can be broadly classified into two lifestyles: free-living (FL) and particle-attached (PA). However, how coastal bacterioplankton the community structure, co-occurrence networks and carbon metabolic functions with different lifestyles are differentiated is still largely unknown. Understanding these processes is necessary to better determine the contributions of coastal bacterioplankton to carbon cycling. Here, the characteristics of community structure and carbon metabolism function of bacterioplankton with two lifestyles in the coastal areas of Guangdong Province were investigated using amplicon sequencing, metagenomic, and metatranscriptomic techniques. The results show that the main bacterioplankton responsible for carbon metabolism were the Pseudomonadota, Bacteroidota, and Actinomycetota. The microbial community structure, carbon metabolic function, and environmental preferences differ between different lifestyles. FL and PA bacteria exhibited higher carbon fixation and degradation potentials, respectively. A range of environmental factors, such as dissolved oxygen, pH, and temperature, were associated with the community structure and carbon metabolic functions of the bacterioplankton. Human activities, such as nutrient discharge, may affect the distribution of functional genes and enhance the carbon degradation functions of bacterioplankton. In conclusion, this study increased the understanding of the role of microorganisms in regulating carbon export in coastal ecosystems with intense human activity.
Funder
National Natural Science Foundation of China
Key-Area Research and Development Program of Guangdong Province
Guangdong Basic and Applied Basic Research Foundation
Science and Technology Program by Department of Natural Resources of Guangdong Province
Key Research Program Project of Guangzhou Science and Technology Bureau
Publisher
Springer Science and Business Media LLC