Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China

Free-living marine nematodes are sensitive biological indicators of environmental quality in marine sediments. This study investigated nematode communities in coastal waters in Bohai Bay, China. Nematode community taxonomic structure, colonizer–persister classes, maturity index (MI), index of trophi...

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Autores principales:	Er Hua, Yanmei Zhu, Deming Huang, Xiaoshou Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Free-living marine nematodes Biological indicator Heavy metals Environmental quality Bohai Bay Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/58970864c33146399a6f481ae10f3e26
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id	oai:doaj.org-article:58970864c33146399a6f481ae10f3e26
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spelling	oai:doaj.org-article:58970864c33146399a6f481ae10f3e262021-12-01T04:52:51ZAre free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China1470-160X10.1016/j.ecolind.2021.107756https://doaj.org/article/58970864c33146399a6f481ae10f3e262021-08-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21004210https://doaj.org/toc/1470-160XFree-living marine nematodes are sensitive biological indicators of environmental quality in marine sediments. This study investigated nematode communities in coastal waters in Bohai Bay, China. Nematode community taxonomic structure, colonizer–persister classes, maturity index (MI), index of trophic diversity (ITD), Shannon–Wiener diversity index (H′), together with the Hakanson’s Ecological Risk Index, were applied to assess the environmental quality of the investigated stations. The taxonomic structure, MI, ITD, and H′ varied among the study stations. In addition to the stochastic causes, variability in environmental variables together with metal concentrations explained, to a certain extent, the observed variations in nematode features. The differentiation in nematode species’ composition was attributed to changes in water depth, temperature, salinity, dissolved oxygen concentration, sediment medium diameter, organic matter, chlorophyll-a and pheophytin-a concentrations, and concentrations of manganese (Mn) and cobalt (Co). Mn was the most influential metal in explaining nematode diversity. MI appeared to be affected more by metals than by other environmental variables. According to the nematode features, the environmental quality ranged from bad to good at the majority of stations, although the rankings varied among different indices. Taxonomic structure, life strategy traits, ITD, and H′ were all effective in highlighting the areas subjected to severe metal contamination in the bay, and could provide more comprehensive assessments when used in combination. These indices suggested a more severe pollution status than the results obtained from the Hakanson’s Ecological Risk Index method, and may be more sensitive to ecological quality deterioration. However, their effectiveness requires further testing over larger spatial ranges and with more data.Er HuaYanmei ZhuDeming HuangXiaoshou LiuElsevierarticleFree-living marine nematodesBiological indicatorHeavy metalsEnvironmental qualityBohai BayEcologyQH540-549.5ENEcological Indicators, Vol 127, Iss , Pp 107756- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Free-living marine nematodes Biological indicator Heavy metals Environmental quality Bohai Bay Ecology QH540-549.5
spellingShingle	Free-living marine nematodes Biological indicator Heavy metals Environmental quality Bohai Bay Ecology QH540-549.5 Er Hua Yanmei Zhu Deming Huang Xiaoshou Liu Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
description	Free-living marine nematodes are sensitive biological indicators of environmental quality in marine sediments. This study investigated nematode communities in coastal waters in Bohai Bay, China. Nematode community taxonomic structure, colonizer–persister classes, maturity index (MI), index of trophic diversity (ITD), Shannon–Wiener diversity index (H′), together with the Hakanson’s Ecological Risk Index, were applied to assess the environmental quality of the investigated stations. The taxonomic structure, MI, ITD, and H′ varied among the study stations. In addition to the stochastic causes, variability in environmental variables together with metal concentrations explained, to a certain extent, the observed variations in nematode features. The differentiation in nematode species’ composition was attributed to changes in water depth, temperature, salinity, dissolved oxygen concentration, sediment medium diameter, organic matter, chlorophyll-a and pheophytin-a concentrations, and concentrations of manganese (Mn) and cobalt (Co). Mn was the most influential metal in explaining nematode diversity. MI appeared to be affected more by metals than by other environmental variables. According to the nematode features, the environmental quality ranged from bad to good at the majority of stations, although the rankings varied among different indices. Taxonomic structure, life strategy traits, ITD, and H′ were all effective in highlighting the areas subjected to severe metal contamination in the bay, and could provide more comprehensive assessments when used in combination. These indices suggested a more severe pollution status than the results obtained from the Hakanson’s Ecological Risk Index method, and may be more sensitive to ecological quality deterioration. However, their effectiveness requires further testing over larger spatial ranges and with more data.
format	article
author	Er Hua Yanmei Zhu Deming Huang Xiaoshou Liu
author_facet	Er Hua Yanmei Zhu Deming Huang Xiaoshou Liu
author_sort	Er Hua
title	Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
title_short	Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
title_full	Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
title_fullStr	Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
title_full_unstemmed	Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China
title_sort	are free-living nematodes effective environmental quality indicators? insights from bohai bay, china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/58970864c33146399a6f481ae10f3e26
work_keys_str_mv	AT erhua arefreelivingnematodeseffectiveenvironmentalqualityindicatorsinsightsfrombohaibaychina AT yanmeizhu arefreelivingnematodeseffectiveenvironmentalqualityindicatorsinsightsfrombohaibaychina AT deminghuang arefreelivingnematodeseffectiveenvironmentalqualityindicatorsinsightsfrombohaibaychina AT xiaoshouliu arefreelivingnematodeseffectiveenvironmentalqualityindicatorsinsightsfrombohaibaychina
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Are free-living nematodes effective environmental quality indicators? Insights from Bohai Bay, China

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