Huang Yongji, Feng Jing-Chun, Kong Jie, Sun Liwei, Zhang Mingrui, Huang Yanyan, Tang Li, Zhang Si, Yang Zhifeng
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, PR China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China.
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, PR China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, PR China.
Sci Total Environ. 2023 Apr 10;868:161725. doi: 10.1016/j.scitotenv.2023.161725. Epub 2023 Jan 18.
The distribution and heterogeneity characteristics of microbial communities in cold seep water columns are significant factors governing the efficiency of methane filtering and carbon turnover. However, this process is poorly understood. The diversity of vertically stratified microbial communities and the factors controlling the community assemblage process in the water column above the Haima cold seep were investigated in this study. The prokaryotic community diversities varied distinctly with vertical changes in hydrochemistry. Cyanobacteria dominated the light-transmitting layers and Proteobacteria dominated the deeper layers. With respect to microbial community assemblages and co-occurrence networks, stochastic processes were particularly important in shaping prokaryotic communities. In the shallow (≥85 m) and mesopelagic water columns (600-800 m), microbial community characteristics were affected by deterministic processes, reduced network connectivity, and modularity. Microbial community diversities and assemblage processes along a vertical profile were influenced by the vertical variations in pH, temperature, DIC, and nutrients. Stochastic processes may have facilitated the formation of complex co-occurrence networks. Briefly, the distribution of local environmental heterogeneity along the vertical dimension could drive unique microbial community assemblage and species coexistence patterns. This study provides new perspectives on how microorganisms adapt to the environment and build communities, and how species coexist in shared habitats.
冷泉水柱中微生物群落的分布和异质性特征是影响甲烷过滤效率和碳周转的重要因素。然而，这一过程目前还知之甚少。本研究调查了海马冷泉上方水柱中垂直分层微生物群落的多样性以及控制群落组装过程的因素。原核生物群落多样性随水化学的垂直变化而显著不同。蓝细菌在透光层占主导地位，变形菌在较深层占主导地位。关于微生物群落组装和共现网络，随机过程在塑造原核生物群落方面尤为重要。在浅水区（≥85米）和中层水柱（600 - 800米），微生物群落特征受确定性过程、网络连通性降低和模块化的影响。沿垂直剖面的微生物群落多样性和组装过程受pH值、温度、溶解无机碳和营养物质的垂直变化影响。随机过程可能促进了复杂共现网络的形成。简而言之，沿垂直维度的局部环境异质性分布可能驱动独特的微生物群落组装和物种共存模式。本研究为微生物如何适应环境并构建群落以及物种如何在共享栖息地中共存提供了新的视角。
