Zhang Zhi-Feng, Pan Jie, Pan Yue-Ping, Li Meng
Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China.
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, China.
mSystems. 2021 Jun 29;6(3):e0138120. doi: 10.1128/mSystems.01381-20. Epub 2021 Jun 15.
Archaea are a major part of Earth's life. They are believed to play important roles in nutrient biogeochemical cycling in the mangrove. However, only a few studies on the archaeal community in mangroves have been reported. In particular, the assembly processes and interaction patterns that impact the archaeal communities in mangroves have not been investigated to date. Here, the biogeography, assembly patterns, and driving factors of archaeal communities in seven representative mangroves across southeastern China were systematically analyzed. The analysis revealed that the archaeal community is more diverse in surface sediments than in subsurface sediments, and more diverse in mangroves at low latitudes than at high latitudes, with and as the most diverse and most abundant phyla, respectively. Beta nearest-taxon index analysis suggested a determinant role of homogeneous selection on the overall archaeon community in all mangroves and in each individual mangrove. In addition, the conditionally rare taxon community was strongly shaped by homogeneous selection, while stochastic processes shaped the dominant taxon and always-rare taxon communities. Further, a moderate effect of environmental selection on the archaeal community was noted, with the smallest effect on the always-rare taxon community. Mangrove location, mean annual temperature, and salinity were the major factors that greatly affected the community composition. Finally, network analysis revealed comprehensive cooccurrence relationships in the archaeal community, with a crucial role of . This study expands the understanding of the biogeography, assembly patterns, driving factors, and cooccurrence relationships of the mangrove archaeal community and inspires functional exploration of archaeal resources in mangrove sediments. As a key microbial community component with important ecological roles, archaea merit the attention of biologists and ecologists. The mechanisms controlling microbial community diversity, composition, and biogeography are central to microbial ecology but poorly understood. Mangroves are located at the land-ocean interface and are an ideal environment for examining the above questions. We here provided the first-ever overview of archaeal community structure and biogeography in mangroves located along an over-9,000-km coastline of southeastern China. We observed that archaeal diversity in low-latitude mangroves was higher than that in high-latitude mangroves. Furthermore, our data indicated that homogeneous selection strongly controlled the assembly of the overall and conditionally rare taxon communities in mangrove sediments, while the dominant taxon and always-rare taxon communities were mainly controlled by dispersal limitation.
古菌是地球生命的重要组成部分。人们认为它们在红树林的养分生物地球化学循环中发挥着重要作用。然而，关于红树林中古菌群落的研究报道较少。特别是，迄今为止尚未对影响红树林中古菌群落的组装过程和相互作用模式进行研究。在此，我们系统地分析了中国东南部七个代表性红树林中古菌群落的生物地理学、组装模式和驱动因素。分析表明，表层沉积物中的古菌群落比地下沉积物中的更为多样，低纬度红树林中的古菌群落比高纬度的更为多样，其中泉古菌门和广古菌门分别是多样性最高和丰度最高的门类。β最近分类单元指数分析表明，均匀选择对所有红树林以及每个单独红树林中的古菌群落整体起决定性作用。此外，条件性稀有分类单元群落受均匀选择的影响很大，而随机过程则影响优势分类单元和始终稀有分类单元群落。此外，还注意到环境选择对古菌群落有一定影响，对始终稀有分类单元群落的影响最小。红树林位置、年平均温度和盐度是极大影响群落组成的主要因素。最后，网络分析揭示了古菌群落中的全面共现关系，其中[具体内容缺失]起关键作用。本研究扩展了对红树林古菌群落的生物地理学、组装模式、驱动因素和共现关系的理解，并激发了对红树林沉积物中古菌资源的功能探索。作为具有重要生态作用的关键微生物群落组成部分，古菌值得生物学家和生态学家关注。控制微生物群落多样性、组成和生物地理学的机制是微生物生态学的核心，但目前了解甚少。红树林位于陆地 - 海洋界面，是研究上述问题的理想环境。我们在此首次概述了中国东南部超过9000公里海岸线上红树林中古菌群落的结构和生物地理学。我们观察到低纬度红树林中的古菌多样性高于高纬度红树林。此外，我们的数据表明，均匀选择强烈控制着红树林沉积物中整体和条件性稀有分类单元群落的组装，而优势分类单元和始终稀有分类单元群落主要受扩散限制控制。
