Journal
MARINE POLLUTION BULLETIN
Volume 124, Issue 2, Pages 1033-1039Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.01.004
Keywords
Ecological risk; Heavy metals; Mangrove restoration; Pearl River estuary; Sediment
Funding
- Ocean Public Fund Research Project [201305021-1]
- Shenzhen Basic Research Discipline Layout Project [JCYJ20150529164918736, JCYJ20160531195354516]
- Guangdong Natural Science Foundation [2015A030313831]
- Chinese Postdoctoral Science Foundation [2015M581071]
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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. (C) 2017 Elsevier Ltd. All rights reserved.
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