Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity

Abstract China’s Three Gorges Reservoir (TGR) is the largest water conservancy project in the world, and plays a significant role in flood control and water transport. To study the health status of the tributaries of TGR, we set up 175 sampling sites, including 15 reference sites and 160 impaired si...

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Autores principales:	Zongfeng Li, Bo Zeng
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6b1cdda66a854064b917288c5282e5ab
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spelling	oai:doaj.org-article:6b1cdda66a854064b917288c5282e5ab2021-12-02T15:10:18ZHealth assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity10.1038/s41598-020-75746-72045-2322https://doaj.org/article/6b1cdda66a854064b917288c5282e5ab2020-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-75746-7https://doaj.org/toc/2045-2322Abstract China’s Three Gorges Reservoir (TGR) is the largest water conservancy project in the world, and plays a significant role in flood control and water transport. To study the health status of the tributaries of TGR, we set up 175 sampling sites, including 15 reference sites and 160 impaired sites on 36 important tributaries of TGR, and collected zoobenthos at these sampling sites. We selected 26 candidate metrics, analyzed them in terms of the distribution range, discriminant ability and correlation. Eight core metrics (i.e., total taxa, ephemerida + trichoptera + plecoptera taxa, diptera taxa, ephemerida%, trichoptera%, Shannon–Wiener diversity index, dominant species% and filter%) were identified, and then the benthic indexes of biological integrity (B-IBI) was established. The B-IBI was then used to evaluate the ecological status of 36 tributaries of TGR. Among all the sampling sites, “excellent”, “good”, “fair”, “poor” and “very poor” accounted for 5.14%, 13.14%, 28.00%, 44.57%, and 9.14%, respectively. Among all streams and rivers, “excellent”, “good” “fair”, “poor” and “very poor” accounted for 5.56%, 41.67%, 50.00%, 2.78%, and 0%, respectively, showing a general good condition for all tributaries. There was a significant difference in health status between tributaries in the TGR dam and those in its upper reaches. The B-IBI established in this study can capture the health status of 36 important tributaries of TGR. This study does not only enrich the practice of health assessment using B-IBI, but also provides some reference for the evaluation of similar rivers across the world.Zongfeng LiBo ZengNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zongfeng Li Bo Zeng Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
description	Abstract China’s Three Gorges Reservoir (TGR) is the largest water conservancy project in the world, and plays a significant role in flood control and water transport. To study the health status of the tributaries of TGR, we set up 175 sampling sites, including 15 reference sites and 160 impaired sites on 36 important tributaries of TGR, and collected zoobenthos at these sampling sites. We selected 26 candidate metrics, analyzed them in terms of the distribution range, discriminant ability and correlation. Eight core metrics (i.e., total taxa, ephemerida + trichoptera + plecoptera taxa, diptera taxa, ephemerida%, trichoptera%, Shannon–Wiener diversity index, dominant species% and filter%) were identified, and then the benthic indexes of biological integrity (B-IBI) was established. The B-IBI was then used to evaluate the ecological status of 36 tributaries of TGR. Among all the sampling sites, “excellent”, “good”, “fair”, “poor” and “very poor” accounted for 5.14%, 13.14%, 28.00%, 44.57%, and 9.14%, respectively. Among all streams and rivers, “excellent”, “good” “fair”, “poor” and “very poor” accounted for 5.56%, 41.67%, 50.00%, 2.78%, and 0%, respectively, showing a general good condition for all tributaries. There was a significant difference in health status between tributaries in the TGR dam and those in its upper reaches. The B-IBI established in this study can capture the health status of 36 important tributaries of TGR. This study does not only enrich the practice of health assessment using B-IBI, but also provides some reference for the evaluation of similar rivers across the world.
format	article
author	Zongfeng Li Bo Zeng
author_facet	Zongfeng Li Bo Zeng
author_sort	Zongfeng Li
title	Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
title_short	Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
title_full	Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
title_fullStr	Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
title_full_unstemmed	Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity
title_sort	health assessment of important tributaries of three georges reservoir based on the benthic index of biotic integrity
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/6b1cdda66a854064b917288c5282e5ab
work_keys_str_mv	AT zongfengli healthassessmentofimportanttributariesofthreegeorgesreservoirbasedonthebenthicindexofbioticintegrity AT bozeng healthassessmentofimportanttributariesofthreegeorgesreservoirbasedonthebenthicindexofbioticintegrity
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Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity

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