Zhang Cui-Jing, Pan Jie, Duan Chang-Hai, Wang Yong-Ming, Liu Yang, Sun Jian, Zhou Hai-Chao, Song Xin, Li Meng
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. 2019 Sep 10;4(5):e00442-19. doi: 10.1128/mSystems.00442-19.
Mangroves, as a blue carbon reservoir, provide an environment for a variety of microorganisms. Mangroves lie in special locations connecting coastal and estuarine areas and experience fluctuating conditions, which are expected to intensify with climate change, creating a need to better understand the relative roles of stochastic and deterministic processes in shaping microbial community assembly. Here, a study of microbial communities inhabiting mangrove sediments across southeastern China, spanning mangroves in six nature reserves, was conducted. We performed high-throughput DNA sequencing of these samples and compared them with data of 1,370 sediment samples collected from the Earth Microbiome Project (EMP) to compare the microbial diversity of mangroves with that of other biomes. Our results showed that prokaryotic alpha diversity in mangroves was significantly higher than that in other biomes and that microbial beta diversity generally clustered according to biome types. The core operational taxonomic units (OTUs) in mangroves were mostly assigned to , , , and The majority of beta nearest-taxon index values were higher than 2, indicating that community assembly in mangroves was better explained through a deterministic process than through a stochastic process. Mean annual precipitation (MAP) and total organic carbon (TOC) were main deterministic factors explaining variation in the microbial community. This study fills a gap in addressing the unique microbial diversity of mangrove ecosystems and their microbial community assembly mechanisms. Understanding the underlying mechanisms of microbial community assembly patterns is a vital issue in microbial ecology. Mangroves, as an important and special ecosystem, provide a unique environment for examining the relative importance of stochastic and deterministic processes. We made the first global-scale comparison and found that microbial diversity was significantly different in mangrove sediments compared to that of other biomes. Furthermore, our results suggest that a deterministic process is more important in shaping microbial community assembly in mangroves.
红树林作为一个蓝碳库,为各种微生物提供了一个环境。红树林位于连接沿海和河口地区的特殊位置,且经历着波动的环境条件,预计随着气候变化这种情况会加剧,这就需要更好地理解随机过程和确定性过程在塑造微生物群落组装中的相对作用。在此,我们对中国东南部六个自然保护区的红树林沉积物中的微生物群落进行了研究。我们对这些样本进行了高通量DNA测序,并将其与从地球微生物组计划(EMP)收集的1370个沉积物样本的数据进行比较,以比较红树林与其他生物群落的微生物多样性。我们的结果表明,红树林中的原核生物α多样性显著高于其他生物群落,并且微生物β多样性通常根据生物群落类型聚类。红树林中的核心操作分类单元(OTU)大多被归类于 、 、 和 。大多数β最近分类单元指数值高于2,这表明红树林中的群落组装通过确定性过程比通过随机过程能得到更好的解释。年平均降水量(MAP)和总有机碳(TOC)是解释微生物群落变化的主要确定性因素。这项研究填补了在解决红树林生态系统独特的微生物多样性及其微生物群落组装机制方面的空白。理解微生物群落组装模式的潜在机制是微生物生态学中的一个重要问题。红树林作为一个重要且特殊的生态系统,为研究随机过程和确定性过程的相对重要性提供了一个独特的环境。我们进行了首次全球尺度的比较,发现红树林沉积物中的微生物多样性与其他生物群落相比有显著差异。此外,我们的结果表明,确定性过程在塑造红树林微生物群落组装中更为重要。