Organochlorine pesticides (OCPs) in corals and plankton from a coastal coral reef ecosystem, south China sea

Recent studies have indicated that coral mucus plays an important role in the bioaccumulation of a few organic pollutants by corals, but no relevant studies have been conducted on organochlorine pesticides (OCPs). Previous studies have also indicated that OCPs widely occur in a few coral reef ecosys...

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Veröffentlicht in:Environmental research 2022-11, Vol.214, p.114060-114060, Article 114060
Hauptverfasser: Kang, Yaru, Zhang, Ruijie, Yu, Kefu, Han, Minwei, Pei, Jiying, Chen, Zhenghua, Wang, Yinghui
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container_title Environmental research
container_volume 214
creator Kang, Yaru
Zhang, Ruijie
Yu, Kefu
Han, Minwei
Pei, Jiying
Chen, Zhenghua
Wang, Yinghui
description Recent studies have indicated that coral mucus plays an important role in the bioaccumulation of a few organic pollutants by corals, but no relevant studies have been conducted on organochlorine pesticides (OCPs). Previous studies have also indicated that OCPs widely occur in a few coral reef ecosystems and have a negative effect on coral health. Therefore, this study focused on the occurrence and bioaccumulation of a few OCPs, such as dichlorodiphenyltrichloroethanes (DDTs), hexachlorobenzene (HCB) and p,p′-methoxychlor (MXC), in the coral tissues and mucus as well as in plankton and seawater from a coastal reef ecosystem (Weizhou Island) in the South China Sea. The results indicated that DDTs were the predominant OCPs in seawater and marine biota. Higher concentrations of OCPs in plankton may contribute to the enrichment of OCPs by corals. The significantly higher total OCP concentration (∑8OCPs) found in coral mucus than in coral tissues suggested that coral mucus played an essential role in resisting enrichment of OCPs by coral tissues. This study explored the different functions of coral tissues and mucus in OCP enrichment and biodegradation for the first time, highlighting the need for OCP toxicity experiments from both tissue and mucus perspectives. [Display omitted] •OCPs were firstly studied in coral mucus in the South China Sea.•Plankton may have an influence on coral enrichment of OCPs.•Obvious higher ∑8OCPs occurred in coral mucus than in coral tissues.•Coral mucus showed lower metabolic capability of DDTs than coral tissues.•Coral mucus may resist the enrichment and metabolism of OCPs by coral tissues.
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This study explored the different functions of coral tissues and mucus in OCP enrichment and biodegradation for the first time, highlighting the need for OCP toxicity experiments from both tissue and mucus perspectives. 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subjects Coral mucus
Coral reef
Organochlorine pesticides (OCPs)
Plankton
South China Sea
Weizhou island
title Organochlorine pesticides (OCPs) in corals and plankton from a coastal coral reef ecosystem, south China sea
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