Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China.
Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China.
Mar Pollut Bull. 2017 Nov 30;124(2):1033-1039. doi: 10.1016/j.marpolbul.2017.01.004. Epub 2017 Jan 7.
The restoration of wetlands has attracted the attention in different countries. Restored coastal wetlands, especially urban wetlands, are sensitive to external pressures. Thus, it is necessary to evaluate the efficiency of the restoration of coastal wetlands, which benefits their management and functional maintenance. In this study, a restored mangrove-aquaculture system in Waterlands Resort at Shenzhen was selected for analysis. The distribution and ecological risk assessment of heavy metals in surface sediments were investigated. The results showed that restoration could effectively decrease the heavy metal concentrations in the sediment, while the restored mangrove posed a moderate ecological risk. Most of the heavy metal concentrations were higher during the dry season compared with the wet season. In addition, during the whole investigation, the sediment quality remained failed to achieve the marine sediment criteria required for aquaculture in China.
湿地修复在不同国家引起了关注。已修复的沿海湿地，特别是城市湿地，对外界压力较为敏感。因此，有必要评估沿海湿地修复的效率，这有利于其管理和功能维护。本研究选择深圳水湾度假村的修复红树林-水产养殖系统进行分析。调查了表层沉积物中重金属的分布和生态风险评估。结果表明，修复可以有效降低沉积物中的重金属浓度，而修复后的红树林则构成了中等生态风险。与湿季相比，旱季的重金属浓度更高。此外，在整个调查期间，沉积物质量仍未达到中国水产养殖所需的海洋沉积物标准。
