Newly discovered seagrass beds and their potential for blue carbon in the coastal seas of Hainan Island, South China Sea

MARINE POLLUTION BULLETIN

卷:125

Article

Jiang, Zhijian^1,2,3  Liu, Songlin^1,2,3  Zhang, Jingping^1,2  Zhao, Chunyu^1,2,3  Wu, Yunchao^1,2,3  Yu, Shuo^1,3  Zhang, Xia^1,3  Huang, Chi^1,4  Huang, Xiaoping^1,3  Kumar, Manoj^1,5 

[1] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China

[2] Chinese Acad Sci, Trop Marine Biol Res Stn Hainan, Sanya 572200, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Chinese Ocean Univ, Coll Marine Life Sci, Qingdao 266003, Peoples R China

[5] Univ Technol Sydney, Fac Sci, Climate Change Cluster, Sydney, NSW 2007, Australia

关键词: Seagrass bed;    Distribution;    Nutrient dynamics;    Habitat threats;    Blue carbon;    Management;   

DOI  :  10.1016/j.marpolbul.2017.07.066

来源: Elsevier

【 摘 要 】

Eight new seagrass beds were discovered along the coastline of Hainan Island in South China Sea with an area of 203.64 ha. The leaf N content of all seagrasses was above the median value, indicative of N limitation, with their C:N ratio recorded significantly lower than the limiting criteria. This suggested that N is not limiting but in replete status. Further, the lower C content observed in the seagrass leaves was accompanied by higher nutrient concentration. The mean seagrass biomass C was 0.23 +/- 0.16 Mg C ha(-1), while the average sediment organic carbon (SOC) stock was 7.02 +/- 3.57 Mg C ha(-1). The entire SOC stock of the newly discovered seagrass beds was 1306.45 Mg C, and the overall SOC stock of seagrass bed at Hainan Island was 40858.5 Mg C. These seagrass beds are under constant threats from sea reclamation, nutrient input, aquaculture activities for oyster and snail farming, and fishing activities.

【 授权许可】

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