Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin

Abstract To effectively manage a watershed and successfully restore a river system, it is very important to assess the toxicity of sediments and identify the substances causing the toxicity. Seventy-six sediments collected in the Haihe River Basin (HRB) in China were screened for acute toxicity usin...

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Autores principales:	Xiaolei Zhu, Baoqing Shan, Wenzhong Tang, Chao Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/553565f4e98741b6802772ea8fc2b2d4
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spelling	oai:doaj.org-article:553565f4e98741b6802772ea8fc2b2d42021-12-02T12:32:25ZUsing Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin10.1038/s41598-017-01631-52045-2322https://doaj.org/article/553565f4e98741b6802772ea8fc2b2d42017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01631-5https://doaj.org/toc/2045-2322Abstract To effectively manage a watershed and successfully restore a river system, it is very important to assess the toxicity of sediments and identify the substances causing the toxicity. Seventy-six sediments collected in the Haihe River Basin (HRB) in China were screened for acute toxicity using Chironomus dilutus. We found that sediments from more than 32% of sampling sites, distributed mainly in the Ziya tributary and along the estuary, were acutely toxic to midges. A toxicity identification evaluation showed that the toxicity of the sediment samples was mainly from ammonia nitrogen, metals, and organics. Calculations of the toxic unit (TU) showed that ammonia and metals contributed more to sediment toxicity than organics, and that PAHs may have contributed in other tributaries. A modified three-step sequential extraction procedure to assess the bioavailability of the metals indicated that the toxicity from metals was mainly from Cd and Zn. This is one of the first studies in which this type of approach has been applied to directly connect contaminants with ecological effects in the HRB.Xiaolei ZhuBaoqing ShanWenzhong TangChao ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaolei Zhu Baoqing Shan Wenzhong Tang Chao Zhang Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
description	Abstract To effectively manage a watershed and successfully restore a river system, it is very important to assess the toxicity of sediments and identify the substances causing the toxicity. Seventy-six sediments collected in the Haihe River Basin (HRB) in China were screened for acute toxicity using Chironomus dilutus. We found that sediments from more than 32% of sampling sites, distributed mainly in the Ziya tributary and along the estuary, were acutely toxic to midges. A toxicity identification evaluation showed that the toxicity of the sediment samples was mainly from ammonia nitrogen, metals, and organics. Calculations of the toxic unit (TU) showed that ammonia and metals contributed more to sediment toxicity than organics, and that PAHs may have contributed in other tributaries. A modified three-step sequential extraction procedure to assess the bioavailability of the metals indicated that the toxicity from metals was mainly from Cd and Zn. This is one of the first studies in which this type of approach has been applied to directly connect contaminants with ecological effects in the HRB.
format	article
author	Xiaolei Zhu Baoqing Shan Wenzhong Tang Chao Zhang
author_facet	Xiaolei Zhu Baoqing Shan Wenzhong Tang Chao Zhang
author_sort	Xiaolei Zhu
title	Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
title_short	Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
title_full	Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
title_fullStr	Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
title_full_unstemmed	Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin
title_sort	using chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the haihe river basin
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/553565f4e98741b6802772ea8fc2b2d4
work_keys_str_mv	AT xiaoleizhu usingchironomusdilutustoidentifytoxicantsandevaluatetheecotoxicityofsedimentsinthehaiheriverbasin AT baoqingshan usingchironomusdilutustoidentifytoxicantsandevaluatetheecotoxicityofsedimentsinthehaiheriverbasin AT wenzhongtang usingchironomusdilutustoidentifytoxicantsandevaluatetheecotoxicityofsedimentsinthehaiheriverbasin AT chaozhang usingchironomusdilutustoidentifytoxicantsandevaluatetheecotoxicityofsedimentsinthehaiheriverbasin
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Using Chironomus dilutus to identify toxicants and evaluate the ecotoxicity of sediments in the Haihe River Basin

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