Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system

The incoming water area of the Central Line Project of the South-to-North Water Diversion comprises the upper reaches of the Han River in China. Bacterioplankton are important members of river ecosystems. However, the mechanisms (deterministic or stochastic processes) regulating planktonic bacterial...

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Autores principales:	He Sun, Baozhu Pan, Haoran He, Gengnan Zhao, Yiming Hou, Penghui Zhu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Biogeography Bacterioplankton communities Co-occurrence networks Neutral community model Exact sequencing variants Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/48e67a29180e43a492fcd602e74d0b51
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spelling	oai:doaj.org-article:48e67a29180e43a492fcd602e74d0b512021-12-01T04:50:19ZAssembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system1470-160X10.1016/j.ecolind.2021.107643https://doaj.org/article/48e67a29180e43a492fcd602e74d0b512021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21003083https://doaj.org/toc/1470-160XThe incoming water area of the Central Line Project of the South-to-North Water Diversion comprises the upper reaches of the Han River in China. Bacterioplankton are important members of river ecosystems. However, the mechanisms (deterministic or stochastic processes) regulating planktonic bacterial community structure in the upper Han River are not well understood. Herein, we documented the spatiotemporal patterns, assembly processes, and co-occurrence relationships of the planktonic bacterial communities in the Han River and its tributaries. Seasonal variations in bacterioplankton communities were clearly observed and were more obvious than spatial differences. The planktonic bacterial community showed a significant distance (dendritic distance) decay pattern during the two sampling periods, and the distance decay pattern was stronger in spring than in the other season. Network analysis showed that bacterial community networks displayed non-random co-occurrence patterns, and significant differences in the topological properties of empirical and random networks (average clustering coefficient, average path length, and average degree) were found. Compared to those of the tributaries, the network of the mainstem had the lowest modularity; this may be caused by the significant difference in biodiversity between the mainstem and the tributaries. Redundancy analysis revealed that pH exhibited significant effects on the planktonic bacterial community in both seasons. However, variation partitioning analysis showed that spatial factors (stochastic processes) contributed more to explaining community assembly than environmental factors during the two seasons. In addition, the neutral community model can also explain a large part of the community variation observed during the autumn and spring (R2 = 0.817 and 0.808, respectively). This study shows that seasonal variation in the bacterial community is greatly influenced by seasonal environmental variation. However, stochastic processes dominantly affect the structure of the bacterioplankton community within seasons. In order to effectively manage and protect microbial diversity, managers consider not only local species diversity, but also the effect of regional species dispersal.He SunBaozhu PanHaoran HeGengnan ZhaoYiming HouPenghui ZhuElsevierarticleBiogeographyBacterioplankton communitiesCo-occurrence networksNeutral community modelExact sequencing variantsEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107643- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biogeography Bacterioplankton communities Co-occurrence networks Neutral community model Exact sequencing variants Ecology QH540-549.5
spellingShingle	Biogeography Bacterioplankton communities Co-occurrence networks Neutral community model Exact sequencing variants Ecology QH540-549.5 He Sun Baozhu Pan Haoran He Gengnan Zhao Yiming Hou Penghui Zhu Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
description	The incoming water area of the Central Line Project of the South-to-North Water Diversion comprises the upper reaches of the Han River in China. Bacterioplankton are important members of river ecosystems. However, the mechanisms (deterministic or stochastic processes) regulating planktonic bacterial community structure in the upper Han River are not well understood. Herein, we documented the spatiotemporal patterns, assembly processes, and co-occurrence relationships of the planktonic bacterial communities in the Han River and its tributaries. Seasonal variations in bacterioplankton communities were clearly observed and were more obvious than spatial differences. The planktonic bacterial community showed a significant distance (dendritic distance) decay pattern during the two sampling periods, and the distance decay pattern was stronger in spring than in the other season. Network analysis showed that bacterial community networks displayed non-random co-occurrence patterns, and significant differences in the topological properties of empirical and random networks (average clustering coefficient, average path length, and average degree) were found. Compared to those of the tributaries, the network of the mainstem had the lowest modularity; this may be caused by the significant difference in biodiversity between the mainstem and the tributaries. Redundancy analysis revealed that pH exhibited significant effects on the planktonic bacterial community in both seasons. However, variation partitioning analysis showed that spatial factors (stochastic processes) contributed more to explaining community assembly than environmental factors during the two seasons. In addition, the neutral community model can also explain a large part of the community variation observed during the autumn and spring (R2 = 0.817 and 0.808, respectively). This study shows that seasonal variation in the bacterial community is greatly influenced by seasonal environmental variation. However, stochastic processes dominantly affect the structure of the bacterioplankton community within seasons. In order to effectively manage and protect microbial diversity, managers consider not only local species diversity, but also the effect of regional species dispersal.
format	article
author	He Sun Baozhu Pan Haoran He Gengnan Zhao Yiming Hou Penghui Zhu
author_facet	He Sun Baozhu Pan Haoran He Gengnan Zhao Yiming Hou Penghui Zhu
author_sort	He Sun
title	Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
title_short	Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
title_full	Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
title_fullStr	Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
title_full_unstemmed	Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
title_sort	assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/48e67a29180e43a492fcd602e74d0b51
work_keys_str_mv	AT hesun assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem AT baozhupan assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem AT haoranhe assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem AT gengnanzhao assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem AT yiminghou assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem AT penghuizhu assemblyprocessesandcooccurrencerelationshipsinthebacterioplanktoncommunitiesofalargeriversystem
_version_	1718405720895913984

Assembly processes and co-occurrence relationships in the bacterioplankton communities of a large river system

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