Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance

Global environmental change has altered biotic interactions in ecosystems. Trophic structure is a major characteristic of ecosystems, and understanding the factors determining trophic structure is thus important for predicting the response of ecological dynamics and ecosystem services to future envi...

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Autores principales:	Yintao Jia, Yihang Jiang, Yuhan Liu, Xiaoyun Sui, Xiu Feng, Ren Zhu, Yifeng Chen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Shallow lakes Trophic structure Ecosystem size Productivity Disturbance Management implication Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/b51cc762321949feb4d67b8f5b64d8cc
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spelling	oai:doaj.org-article:b51cc762321949feb4d67b8f5b64d8cc2021-12-01T04:55:55ZUnderstanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance1470-160X10.1016/j.ecolind.2021.107924https://doaj.org/article/b51cc762321949feb4d67b8f5b64d8cc2021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21005896https://doaj.org/toc/1470-160XGlobal environmental change has altered biotic interactions in ecosystems. Trophic structure is a major characteristic of ecosystems, and understanding the factors determining trophic structure is thus important for predicting the response of ecological dynamics and ecosystem services to future environmental change. Different kinds of drivers, including ecosystem size, productivity, and disturbance, have been proposed to explain trophic structure variation in various ecosystems. Much remains unknown about how these drivers operate in determining trophic structure and its underlying mechanisms, particularly in shallow lakes. Here, we evaluated the relative importance of ecosystem size, productivity and disturbance in influencing the trophic structure of fish assemblages in 30 subtropical shallow lakes. We determined that (1) ecosystem size, productivity and disturbance had no effect on food chain length; (2) the mean trophic level increased with increasing ecosystem size and productivity, with productivity contributing the most to explaining the variance in mean trophic level; and (3) ecosystem size, productivity, and disturbance, alone or combined, affected the proportion of species at specific trophic levels. These results indicate the potential for systematic discrepancies in the drivers of trophic structure among different systems and highlight that focusing on food chain length alone may not be sufficient in reflecting the variation in trophic status. Thus, changes in the mean trophic level and specific trophic-level guilds must be considered in future lake management practices.Yintao JiaYihang JiangYuhan LiuXiaoyun SuiXiu FengRen ZhuYifeng ChenElsevierarticleShallow lakesTrophic structureEcosystem sizeProductivityDisturbanceManagement implicationEcologyQH540-549.5ENEcological Indicators, Vol 129, Iss , Pp 107924- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Shallow lakes Trophic structure Ecosystem size Productivity Disturbance Management implication Ecology QH540-549.5
spellingShingle	Shallow lakes Trophic structure Ecosystem size Productivity Disturbance Management implication Ecology QH540-549.5 Yintao Jia Yihang Jiang Yuhan Liu Xiaoyun Sui Xiu Feng Ren Zhu Yifeng Chen Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
description	Global environmental change has altered biotic interactions in ecosystems. Trophic structure is a major characteristic of ecosystems, and understanding the factors determining trophic structure is thus important for predicting the response of ecological dynamics and ecosystem services to future environmental change. Different kinds of drivers, including ecosystem size, productivity, and disturbance, have been proposed to explain trophic structure variation in various ecosystems. Much remains unknown about how these drivers operate in determining trophic structure and its underlying mechanisms, particularly in shallow lakes. Here, we evaluated the relative importance of ecosystem size, productivity and disturbance in influencing the trophic structure of fish assemblages in 30 subtropical shallow lakes. We determined that (1) ecosystem size, productivity and disturbance had no effect on food chain length; (2) the mean trophic level increased with increasing ecosystem size and productivity, with productivity contributing the most to explaining the variance in mean trophic level; and (3) ecosystem size, productivity, and disturbance, alone or combined, affected the proportion of species at specific trophic levels. These results indicate the potential for systematic discrepancies in the drivers of trophic structure among different systems and highlight that focusing on food chain length alone may not be sufficient in reflecting the variation in trophic status. Thus, changes in the mean trophic level and specific trophic-level guilds must be considered in future lake management practices.
format	article
author	Yintao Jia Yihang Jiang Yuhan Liu Xiaoyun Sui Xiu Feng Ren Zhu Yifeng Chen
author_facet	Yintao Jia Yihang Jiang Yuhan Liu Xiaoyun Sui Xiu Feng Ren Zhu Yifeng Chen
author_sort	Yintao Jia
title	Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
title_short	Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
title_full	Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
title_fullStr	Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
title_full_unstemmed	Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance
title_sort	understanding trophic structure variation in fish assemblages of subtropical shallow lakes: combined effects of ecosystem size, productivity, and disturbance
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b51cc762321949feb4d67b8f5b64d8cc
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Understanding trophic structure variation in fish assemblages of subtropical shallow lakes: Combined effects of ecosystem size, productivity, and disturbance

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