绿华岛贻贝养殖区环境变化的沉积记录

doi:10.3969/j.issn.1000-5641.2025.02.008

华东师范大学学报（自然科学版） ›› 2025, Vol. 2025 ›› Issue (2): 77-85.doi: 10.3969/j.issn.1000-5641.2025.02.008

• 海岸带人类活动与沉积响应 • 上一篇下一篇

绿华岛贻贝养殖区环境变化的沉积记录

肖美群, 邓兵*(), 张国森, 杜金洲, 毕倩倩

华东师范大学河口海岸全国重点实验室, 上海　200241

收稿日期:2023-12-18 接受日期:2024-03-17 出版日期:2025-03-25 发布日期:2025-03-27
通讯作者: 邓兵 E-mail:dengbing@sklec.ecnu.edu.cn
基金资助:
国家重点研发计划 (2018YFD0900901)

Sedimentary records of environmental changes in the mussel farming area of Lyuhua Island

Meiqun XIAO, Bing DENG*(), Guosen ZHANG, Jinzhou DU, Qianqian BI

State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai　200241, China

Received:2023-12-18 Accepted:2024-03-17 Online:2025-03-25 Published:2025-03-27
Contact: Bing DENG E-mail:dengbing@sklec.ecnu.edu.cn

摘要/Abstract

摘要：

为探究自2000年嵊泗县海水养殖业兴盛以来, 绿华岛贻贝养殖区的环境变化, 对其南部海湾的沉积物岩芯进行了沉积记录分析. 结果显示, 相对于2000年之前, 总氮(Total Nitrogen, TN)含量减少了约23%, 总磷(Total Phosphorus, TP)含量也略有降低, 表明研究区域的营养水平有所下降. 此外, 有机碳稳定同位素比值(δ¹³Corg)在2000年后呈现变轻趋势, 进一步反映了初级生产力的下降. 结合年代测定和粒度组成分析, 该海区沉积环境整体较为稳定. 研究区域位于长江冲淡水的影响范围内, 然而, 沉积物表层的TN和δ¹³Corg却表现出下降趋势. 研究结果表明, 绿华岛南部养殖区营养水平的降低主要归因于贻贝收获对营养物质的去除.

关键词: 绿华岛, 贻贝养殖, 沉积记录, 生源要素

Abstract:

This study aimed to investigate the environmental changes in the mussel farming area of Lyuhua Island since the marine aquaculture boom in Shengsi County in 2000. Sedimentary records were established for a sediment core in the bay south of Lyuhua Island. Notably, compared to before 2000, the total nitrogen (TN) content decreased by approximately 23%, and total phosphorus (TP) content also slightly declined, suggesting a decrease in the nutrient levels in the study area. In addition, the stable isotope ratio of organic carbon (δ¹³Corg) became lighter after the year 2000, indicating a reduction in primary productivity. Combined with dating and grain size composition analysis, the sedimentary environment in this study area was relatively stable. The study area is within the influence range of the Changjiang Diluted Water. However, TN and δ¹³Corg showed a significant decreasing trend on the sediment surface. These results suggest that the decrease in nutrient levels in the study area can be primarily attributed to removing nutrients by mussel harvesting.

Key words: Lyuhua Island, mussel farming, sedimentary record, biogenic components

中图分类号:

肖美群, 邓兵, 张国森, 杜金洲, 毕倩倩. 绿华岛贻贝养殖区环境变化的沉积记录[J]. 华东师范大学学报（自然科学版）, 2025, 2025(2): 77-85.

Meiqun XIAO, Bing DENG, Guosen ZHANG, Jinzhou DU, Qianqian BI. Sedimentary records of environmental changes in the mussel farming area of Lyuhua Island[J]. J* E* C* N* U* N* S*, 2025, 2025(2): 77-85.

图/表 5

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绿华岛贻贝养殖区环境变化的沉积记录

Sedimentary records of environmental changes in the mussel farming area of Lyuhua Island

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