Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients
Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients
复制标题
多环境梯度典型河口沼泽中的细菌群落组装
DOI：
10.1128/aem.02602-18
复制
发表时间：
2019-01
影响因子：
4.4
通讯作者：
Demin Zhang
中科院分区：
文献类型：
--
作者：
Zhiyuan Yao;Shicong Du;Chunling Liang;Yueji Zhao;Francisco Dini-Andreote;Kai Wang;Demin Zhang
盐沼代表了大气、大陆和海洋相互作用的高度动态的生态系统。该生态系统中的细菌分布具有重要的生态意义，因为它提供了作用于生态系统服务的基本功能。然而，人们对盐沼介导细菌聚集的生态过程知之甚少，尤其是位于河口的盐沼。本研究对杭州湾南部河口沼泽中细菌群落的分布和组装进行了调查。结果揭示了随机过程和确定性过程之间复杂的相互作用，介导了所研究的梯度系统中细菌群落的组装。总的来说，我们的研究结果说明了群落聚集的主要驱动因素，考虑到沉积物非生物变量的变化和潜在的生物相互作用。因此，我们提供了对河口细菌群落的新见解，并说明了塑造河口沼泽生态系统中细菌群落组装的生态过程的相互作用。摘要 细菌群落在河口沼泽生态系统中发挥着重要作用，但其群落组装背后的生态过程的相互作用却知之甚少。在这里，我们使用 16S rRNA 基因扩增子测序，沿着从水陆交界处延伸到高沼泽的线性梯度研究了沉积物细菌群落。沉积物横断面之间的细菌群落组成存在显着差异。理化性质，特别是沉积物养分水平（即总氮[TN]和速效磷[AP]）以及沉积物物理结构和pH值（P < 0.05）与整体群落变化密切相关。此外，细菌共现网络的拓扑特性随着距水陆交界处的距离而变化。节点级和网络级拓扑特征都表明，距交界处最远的沉积物的细菌网络在复杂性和相互作用方面不如其他沉积物那么强烈。系统发育零模型分析表明，水陆交界处的群落组装逐渐从随机性转变为确定性群落组装，直至新兴的陆地系统。总而言之，这项研究的数据提供了河口沼泽沉积物细菌群落分布模式的详细轮廓，并揭示了介导沼泽土壤中细菌群落组装的机制和过程。重要性 盐沼代表了大气、大陆和海洋相互作用的高度动态的生态系统。该生态系统中的细菌分布具有重要的生态意义，因为它提供了作用于生态系统服务的基本功能。然而，人们对盐沼介导细菌聚集的生态过程知之甚少，尤其是位于河口的盐沼。本研究对杭州湾南部河口沼泽中细菌群落的分布和组装进行了调查。结果揭示了随机过程和确定性过程之间复杂的相互作用，介导了所研究的梯度系统中细菌群落的组装。总的来说，我们的研究结果说明了群落聚集的主要驱动因素，考虑到沉积物非生物变量的变化和潜在的生物相互作用。因此，我们提供了对河口细菌群落的新见解，并说明了塑造河口沼泽生态系统中细菌群落组装的生态过程的相互作用。
Salt marshes represent highly dynamic ecosystems where the atmosphere, continents, and the ocean interact. The bacterial distribution in this ecosystem is of great ecological concern, as it provides essential functions acting on ecosystem services. However, ecological processes mediating bacterial assembly are poorly understood for salt marshes, especially the ones located in estuaries. In this study, the distribution and assembly of bacterial communities in an estuarine marsh located in south Hangzhou Bay were investigated. The results revealed an intricate interplay between stochastic and deterministic processes mediating the assembly of bacterial communities in the studied gradient system. Collectively, our findings illustrate the main drivers of community assembly, taking into consideration changes in sediment abiotic variables and potential biotic interactions. Thus, we offer new insights into estuarine bacterial communities and illustrate the interplay of ecological processes shaping the assembly of bacterial communities in estuarine marsh ecosystems. ABSTRACT Bacterial communities play essential roles in estuarine marsh ecosystems, but the interplay of ecological processes underlying their community assembly is poorly understood. Here, we studied the sediment bacterial communities along a linear gradient extending from the water-land junction toward a high marsh, using 16S rRNA gene amplicon sequencing. Bacterial community compositions differed significantly between sediment transects. Physicochemical properties, particularly sediment nutrient levels (i.e., total nitrogen [TN] and available phosphorus [AP]), as well as sediment physical structure and pH (P < 0.05), were strongly associated with the overall community variations. In addition, the topological properties of bacterial cooccurrence networks varied with distance to the water-land junction. Both node- and network-level topological features revealed that the bacterial network of sediments farthest from the junction was less intense in complexity and interactions than other sediments. Phylogenetic null modeling analysis showed a progressive transition from stochastic to deterministic community assembly for the water-land junction sites toward the emerging terrestrial system. Taken together, data from this study provide a detailed outline of the distribution pattern of the sediment bacterial community across an estuarine marsh and inform the mechanisms and processes mediating bacterial community assembly in marsh soils. IMPORTANCE Salt marshes represent highly dynamic ecosystems where the atmosphere, continents, and the ocean interact. The bacterial distribution in this ecosystem is of great ecological concern, as it provides essential functions acting on ecosystem services. However, ecological processes mediating bacterial assembly are poorly understood for salt marshes, especially the ones located in estuaries. In this study, the distribution and assembly of bacterial communities in an estuarine marsh located in south Hangzhou Bay were investigated. The results revealed an intricate interplay between stochastic and deterministic processes mediating the assembly of bacterial communities in the studied gradient system. Collectively, our findings illustrate the main drivers of community assembly, taking into consideration changes in sediment abiotic variables and potential biotic interactions. Thus, we offer new insights into estuarine bacterial communities and illustrate the interplay of ecological processes shaping the assembly of bacterial communities in estuarine marsh ecosystems.
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DOI：
--
发表时间：
2003
期刊：
--
影响因子：
--
作者：
Han Xiao-fei
通讯作者：
Han Xiao-fei
DOI：
10.1038/ismej.2015.257
发表时间：
2016-08
期刊：
The ISME journal
影响因子：
--
作者：
Dyksma S;Bischof K;Fuchs BM;Hoffmann K;Meier D;Meyerdierks A;Pjevac P;Probandt D;Richter M;Stepanauskas R;Mußmann M
通讯作者：
Mußmann M
影响因子：
10.7
作者：
Price MN;Dehal PS;Arkin AP
通讯作者：
Arkin AP
空间尺度影响华北平原麦田土壤细菌群落随机性与决定性的相对作用
影响因子：
15.5
作者：
Shi Y;Li Y;Xiang X;Sun R;Yang T;He D;Zhang K;Ni Y;Zhu YG;Adams JM;Chu H
通讯作者：
Chu H
影响因子：
16.6
作者：
Kearns, Patrick J.;Angell, John H.;Howard, Evan M.;Deegan, Linda A.;Stanley, Rachel H. R.;Bowen, Jennifer L.
通讯作者：
Bowen, Jennifer L.