Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river

Abstract Identifying seasonal shifts in community assembly for multiple biological groups is important to help enhance our understanding of their ecological dynamics. However, such knowledge on lotic assemblages is still limited. In this study, we used biological traits and functional diversity indi...

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Autores principales:	Jun Wang, Jiancheng Hu, Tao Tang, Jani Heino, Xiaoming Jiang, Zhengfei Li, Zhicai Xie
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2020
Materias:	Chishui River functional diversity functional traits lotic assemblages null model Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/e20fcaf86806450da5963fed84bedcc6
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spelling	oai:doaj.org-article:e20fcaf86806450da5963fed84bedcc62021-11-04T13:06:09ZSeasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river2045-775810.1002/ece3.5904https://doaj.org/article/e20fcaf86806450da5963fed84bedcc62020-01-01T00:00:00Zhttps://doi.org/10.1002/ece3.5904https://doaj.org/toc/2045-7758Abstract Identifying seasonal shifts in community assembly for multiple biological groups is important to help enhance our understanding of their ecological dynamics. However, such knowledge on lotic assemblages is still limited. In this study, we used biological traits and functional diversity indices in association with null model analyses to detect seasonal shifts in the community assembly mechanisms of lotic macroinvertebrates and diatoms in an unregulated subtropical river in China. We found that functional composition and functional diversity (FRic, FEve, FDis, MNN, and SDNN) showed seasonal variation for macroinvertebrate and diatom assemblages. Null models suggested that environmental filtering, competitive exclusion, and neutral process were all important community assembly mechanisms for both biological groups. However, environmental filtering had a stronger effect on spring macroinvertebrate assemblages than autumn assemblages, but the effect on diatom assemblages was the same in both seasons. Moreover, macroinvertebrate and diatom assemblages were shaped by different environmental factors. Macroinvertebrates were filtered mainly by substrate types, velocity, and CODMn, while diatoms were mainly shaped by altitude, substrate types, and water quality. Therefore, our study showed (a) that different biological assemblages in a river system presented similarities and differences in community assembly mechanisms, (b) that multiple processes play important roles in maintaining benthic community structure, and (c) that these patterns and underlying mechanisms are seasonally variable. Thus, we highlight the importance of exploring the community assembly mechanisms of multiple biological groups, especially in different seasons, as this is crucial to improve the understanding of river community changes and their responses to environmental degradation.Jun WangJiancheng HuTao TangJani HeinoXiaoming JiangZhengfei LiZhicai XieWileyarticleChishui Riverfunctional diversityfunctional traitslotic assemblagesnull modelEcologyQH540-549.5ENEcology and Evolution, Vol 10, Iss 2, Pp 692-704 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chishui River functional diversity functional traits lotic assemblages null model Ecology QH540-549.5
spellingShingle	Chishui River functional diversity functional traits lotic assemblages null model Ecology QH540-549.5 Jun Wang Jiancheng Hu Tao Tang Jani Heino Xiaoming Jiang Zhengfei Li Zhicai Xie Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
description	Abstract Identifying seasonal shifts in community assembly for multiple biological groups is important to help enhance our understanding of their ecological dynamics. However, such knowledge on lotic assemblages is still limited. In this study, we used biological traits and functional diversity indices in association with null model analyses to detect seasonal shifts in the community assembly mechanisms of lotic macroinvertebrates and diatoms in an unregulated subtropical river in China. We found that functional composition and functional diversity (FRic, FEve, FDis, MNN, and SDNN) showed seasonal variation for macroinvertebrate and diatom assemblages. Null models suggested that environmental filtering, competitive exclusion, and neutral process were all important community assembly mechanisms for both biological groups. However, environmental filtering had a stronger effect on spring macroinvertebrate assemblages than autumn assemblages, but the effect on diatom assemblages was the same in both seasons. Moreover, macroinvertebrate and diatom assemblages were shaped by different environmental factors. Macroinvertebrates were filtered mainly by substrate types, velocity, and CODMn, while diatoms were mainly shaped by altitude, substrate types, and water quality. Therefore, our study showed (a) that different biological assemblages in a river system presented similarities and differences in community assembly mechanisms, (b) that multiple processes play important roles in maintaining benthic community structure, and (c) that these patterns and underlying mechanisms are seasonally variable. Thus, we highlight the importance of exploring the community assembly mechanisms of multiple biological groups, especially in different seasons, as this is crucial to improve the understanding of river community changes and their responses to environmental degradation.
format	article
author	Jun Wang Jiancheng Hu Tao Tang Jani Heino Xiaoming Jiang Zhengfei Li Zhicai Xie
author_facet	Jun Wang Jiancheng Hu Tao Tang Jani Heino Xiaoming Jiang Zhengfei Li Zhicai Xie
author_sort	Jun Wang
title	Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
title_short	Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
title_full	Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
title_fullStr	Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
title_full_unstemmed	Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
title_sort	seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river
publisher	Wiley
publishDate	2020
url	https://doaj.org/article/e20fcaf86806450da5963fed84bedcc6
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Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river

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