Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (8): 2020-2025.DOI: 10.16178/j.issn.0528-9017.20250567

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Sediment organic carbon content and reserve in a restored oyster reef in Rui′an,Zhejiang,China

LIU Ying1,2,3,4(), XUE Feng1,2,3,4(), CHEN Jinong1,2,3,4, MA Jingwu5, ZHOU Hao5   

  1. 1.Zhejiang Mariculture Research Institute,Wenzhou 325005,Zhejiang
    2.Zhejiang Key Laboratory of Coastal Biological Germplasm Resources Conservation and Utilization,Wenzhou 325005,Zhejiang
    3.Wenzhou Key Laboratory of Marine Biological Genetics and Breeding,Wenzhou 325005,Zhejiang
    4.Sino-Thai Joint Laboratory of Marine Science and Technology,Wenzhou 325000,Zhejiang
    5.Wenzhou Land Consolidation and Rehabilitation Center,Wenzhou 325000,Zhejiang
  • Received:2025-08-11 Online:2026-08-11 Published:2026-08-20
  • Contact: XUE Feng

Abstract:

To investigate sediment carbon reserve in the oyster reef restoration area of Rui’an,Zhejiang,China,this study collected vertical sediment cores from the Dingshan Phase Ⅱ(EC,EX)and Dingshan Phase Ⅲ(SX)oyster reef restoration areas in Rui'an in 2024. The characteristics of sediment organic carbon content,organic carbon density,and organic carbon reserve in the study area were explored. The results showed that the average sediment organic carbon contents in EC,EX,and SX were 0.373%,0.431%,and 0.203%,respectively,while the average organic carbon densities were 2.95×10-3,3.12×10-3,and 1.35×10-3 g·cm-3,respectively. The organic carbon content and density of sediments in all three areas exhibited wavelike changes with increasing depth,though their trends were inconsistent across sites. At the same sediment depth,the organic carbon reserve in SX showed significant(p<0.05)differences compared with those in EC and EX. For EC,the 70-80 cm profile had the highest organic carbon storage proportion within the 0-120 cm sediment layer,whereas for EX and SX,the highest proportions were both observed in the 20-30 cm profile. Grouped analysis of sediments collected from different intertidal zones in Dingshan Phase Ⅱ(EX)and Dingshan Phase Ⅲ(SX)revealed no significant differences in organic carbon density and organic carbon reserve among samples from the high,medium,and low tidal zones. These findings revealed the characteristics of sediment organic carbon content and vertical carbon reserve distribution within the Rui’an oyster reef restoration area,providing essential baseline data for evaluating the effectiveness of ecological restoration in this region.

Key words: oyster reef, sediments, organic carbon

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