Occurrence, distribution and seasonal variation of chlorinated paraffins in coral communities from South China Sea.
Occurrence, distribution and seasonal variation of chlorinated paraffins in coral communities from South China Sea.
复制标题
南海珊瑚群落中氯化石蜡的存在、分布及季节变化。
DOI：
10.1016/j.jhazmat.2020.123529
复制
发表时间：
2021-01-15
影响因子：
13.6
通讯作者：
Zeng, Lixi
中科院分区：
文献类型：
--
作者：
Chen, Hui;Xu, Lijia;Zeng, Lixi
我们先前的研究揭示了氯化石蜡(CPS)在海洋生物中的生物积累和营养放大。然而，对珊瑚礁生态系统中CPS的发生和分布知之甚少。本文测定了海南岛、南中国海岸带10种常见珊瑚中短链氯化石蜡和中链氯化石蜡的含量。所有珊瑚物种的短链氯化石蜡和短链氯化石蜡的浓度分别为184至7,410和305至14,800 ng g-1lw。在大多数珊瑚物种中，SCCPs和MCCPs的同源类群格局分别以C10Cl6-8和C14Cl7-8为主。枯水期和丰水期的CP水平和类群格局变化不大。冗余度分析表明，CPS在不同珊瑚中的积累模式部分受共生虫密度和珊瑚种类的影响。共生线虫密度与CP水平呈显著负相关。这是第一份关于珊瑚礁中CP暴露的报告，并强调了需要CP毒性数据来评估珊瑚礁生态系统的健康。
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 14,800ng g-1 lw, respectively. In most of the coral species, congener group patterns of the SCCPs and MCCPs were dominated by C10Cl6-8 and C14Cl7-8, 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.