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海草床沉积物有机碳研究综述
叶嘉晖,邱崇玉,曾文轩,史云峰,赵牧秋,韩秋影
海南热带海洋学院
摘要:
海草床具有重要的生态系统服务功能,可以为海洋生物提供栖息地和食物来源,同时还具有重要的碳储存功能,海草床“蓝碳”功能日益受到学术界的重视,据研究全球每年海草床的碳埋藏量高达(2.7~4.4)×107 MgC。近年来,由于人类活动的影响,世界范围内海草床衰退严重,导致海草床沉积物有机碳储量降低。本文综述了全球海草床沉积物有机碳的来源、组分、储量以及指示作用;从物理、化学和生物三方面讨论了影响海草床碳储量的环境因素。最后提出了未来主要研究方向,主要包括加强海草床碳通量普查,分析全球气候变化背景下海草床沉积物有机碳的变化机制,明确海草床碳储量流失速率,研究海岸带工程对海草床沉积物有机碳的影响。评估海草床沉积物有机碳储量及变化机制可以为全球海洋蓝碳研究提供科学依据。
关键词:  海草床  沉积物有机碳  来源  储量  环境因素
DOI:
分类号:
基金项目:海南省高层次人才项目;国家自然科学基金项目(面上项目,重点项目,重大项目);海南热带海洋学院科研启动项目
Review on sediments organic carbon in seagrass beds.
YeJiahui1, Qiuchongyv1, ZengWenxuan2, Shiyunfeng1, Zhaomuqiu1, Hanqiuying1
1.海南热带海洋学院;2.Hainan Tropical Ocean University
Abstract:
Seagrass beds provide important ecosystem services, such as supporting biodiversity and providing carbon storage. More and more scientists studied carbon storage mechanisms of seagrass beds. The annual carbon sequestration of seagrass beds was (2.7~4.4)×107 MgC.In recent years, seagrass beds worldwide have been declining due to human activities, which led to seagrass sediment organic carbon storage reduction. This paper reviewed the research progress of sediments organic carbon in seagrass beds, including the sources, components, storage and environmental indicators. The environmental variations affecting carbon storage in seagrass beds were discussed from three aspects of physics, chemistry and biology. Finally, the main research directions for the future study were proposed, including strengthening the carbon flux survey of seagrass bed,exploring the mechanism of sediment organic carbon change under the background of global climate change, defining the rate of carbon storage loss in seagrass beds and studying the impact of coastal zone engineering on sediment organic carbon. Evaluating carbon storage mechanisms will provide scientific basis for the blue carbon study in the ocean worldwide.
Key words:  Seagrass beds  Sediment organic carbon  Source  Storage  Environmental effects
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