| Huang Xing,Wang Xueping,Li Xiuzhen,Yan Zhongzheng,Sun Yongguang. 2020. Occurrence and transfer of heavy metals in sediments and plants of Aegiceras corniculatum community in the Qinzhou Bay, southwestern China. Acta Oceanologica Sinica, 39(2):79－88 |
| Occurrence and transfer of heavy metals in sediments and plants of Aegiceras corniculatum community in the Qinzhou Bay, southwestern China |
| 钦州湾桐花树群落沉积物及植物体中重金属元素累积与分异研究 |
| Received:March 12, 2019 |
| DOI：10.1007/s13131-020-1555-7 |
| Key words:Aegiceras corniculatum sediment heavy metals accumulation |
| 中文关键词: 桐花树 沉积物 重金属元素 累积 |
| 基金项目:The National Basic Research Program (973 Program) of China under contract No. 2010CB951203; the National Natural Science Foundation of China under contract Nos 41201179, 41201525, 41907320 and 41901226; the foundation of the State Key Laboratory of Estuarine and Coastal Research under contract No. SKLEC-KF-201309; the foundations of Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University under contract Nos 2018TS01 and 2018TS04. |
| Author Name | Affiliation | E-mail | | Huang Xing | Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China | | | Wang Xueping | Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China | | | Li Xiuzhen | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China | xzli@sklec.ecnu.edu.cn | | Yan Zhongzheng | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China | | | Sun Yongguang | National Marine Environment Monitoring Center, Dalian 116023, China | |
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| Abstract: |
| Mangrove wetlands can reduce heavy metal pollution by trapping heavy metals. In this study, the concentration, transport and bioaccumulation of Cr, Cd, Cu, Zn and Pb in the sediments and different parts of Aegiceras corniculatum at four different sites in the Qinzhou Bay in southwestern China were investigated. The results showed that although the potential ecological risk of all five heavy metals was slight, the concentration of Cr was at a moderate pollution level due to the emissions of industries and aquaculture waste water. Core sediment records indicated that the concentrations of heavy metals at the depth of 0-20 cm were relatively high, showing an increasing trend of heavy metals over the past 20-30 years. Cr, Cu, Pb and Cd accumulated mainly in the roots of A. corniculatum, while Zn accumulated mainly in the stems. Aegiceras corniculatum showed the strongest transport capacity for Zn and Cu and the strongest bioaccumulation ability for Cd. Compared with other mangrove communities, A. corniculatum can be chosen as a restoration species in tropical and subtropical coastal zones polluted by Zn, Cu and Cd. |
| 中文摘要: |
| 红树林湿地能够截留和转化重金属，对减轻生态系统中的重金属污染具有重要意义。本文对钦州湾四个不同区域红树林湿地表层、柱样沉积物以及桐花树不同器官中Cr、Cu、Pb、Cd和Zn等5种重金属元素的含量水平进行了调研，并对桐花树对相应重金属元素的富集和转运能力进行了分析。结果表明，受农业和养殖活动的影响，除Cr处于中等污染水平外，研究区表层沉积物中其他重金属元素污染水平均较低，总体处于轻微潜在生态风险水平。柱样沉积物中5种重金属元素含量在过去的20~30年间呈现出污染加剧的态势，且0~20cm层沉积物中重金属元素含量较高。在桐花树不同器官中，Cr、Cu、Pb和Cd易富集在根部，Zn则易富集于茎部。对于本研究中的5种重金属而言，桐花树对Cr的富集能力最强，对Zn、Cu的转运能力最强。与其他红树植物相比，桐花树可作为Zn、Cu、Cd污染湿地恢复树种。 |
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