Chen Hui, Xu Lijia, Zhou Wei, Han Xu, Zeng Lixi
Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou, 511443, China; Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science & Technology, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China.
South China Institute of Environmental Sciences, The Ministry of Ecology and Environment of PRC, Guangzhou, 510530, China.
J Hazard Mater. 2021 Jan 15;402:123529. doi: 10.1016/j.jhazmat.2020.123529. Epub 2020 Jul 22.
Our previous study revealed bioaccumulation and trophic magnification of chlorinated paraffins (CPs) in marine organisms. However, little is known about the occurrence and distribution of CPs in coral reef ecosystems. In this study, the levels of short-chain chlorinated paraffins (SCCPs) and medium-chain chlorinated paraffins (MCCPs) were determined in ten common coral species from the coastal regions of Hainan Island, South China Sea. SCCPs and MCCPs were detected in all coral species in concentrations ranging from 184 to 7,410 and 305 to 14,800 ng g lw, respectively. In most of the coral species, congener group patterns of the SCCPs and MCCPs were dominated by CCl and CCl, respectively. The CP levels and congener group patterns changed slightly between the dry and wet seasons. Redundancy analyses indicated that the accumulation patterns of CPs in different corals were partly influenced by Symbiodinium densities and coral species. Significant negative correlations were found between Symbiodinium densities and CP levels. This is the first report of CP exposure in reef corals and highlights the need for CP toxicity data to evaluate the health of coral reef ecosystems.
我们之前的研究揭示了海洋生物中氯化石蜡（CPs）的生物累积和营养级放大效应。然而，关于CPs在珊瑚礁生态系统中的存在情况和分布却知之甚少。在本研究中，测定了中国南海海南岛沿海地区十种常见珊瑚物种中短链氯化石蜡（SCCPs）和中链氯化石蜡（MCCPs）的含量。在所有珊瑚物种中均检测到了SCCPs和MCCPs，其浓度分别为184至7410 ng g lw和305至14800 ng g lw。在大多数珊瑚物种中，SCCPs和MCCPs的同系物组模式分别以CCl和CCl为主。旱季和雨季之间，CPs含量和同系物组模式略有变化。冗余分析表明，不同珊瑚中CPs的积累模式部分受共生藻密度和珊瑚物种的影响。共生藻密度与CPs含量之间存在显著负相关。这是关于礁珊瑚中CPs暴露的首次报告，并强调需要CPs毒性数据来评估珊瑚礁生态系统的健康状况。
