海南黎安港海草床碳储量评估  

Carbon storage in the seagrass beds of Li’an Bay, Hainan

作　　者：杨熙[1,2,3] 余威 何静[1,2,3] 黄盛 YANG Xi;YU Wei;HE Jing;HUANG Sheng(South China Sea Environmental Monitoring Center,State Oceanic Administration,Guangzhou 510300,China;Key Laboratory of Marine Environmental Survey Technology and Application,Ministry of Natural Resources,Guangzhou 510300,China;Nansha Islands Coral Reef Ecosystem National Observation and Research Station,Hainan,Guangzhou 510300,China)

机构地区：[1]国家海洋局南海环境监测中心,广东广州510300 [2]自然资源部海洋环境探测技术与应用重点实验室,广东广州510300 [3]海南南沙珊瑚礁生态系统国家野外科学观测研究站,广东广州510300

出　　处：《海洋科学》2022年第11期116-125,共10页Marine Sciences

基　　金：自然资源部海洋环境探测技术与应用重点实验室2020年度自主设立课题(MESTA-2020-C006);广东省平台基地及科技基础条件建设项目(2021B1212050025);中国海洋发展基金会项目(CODF-002-ZX-2021);2019年省级促进经济高质量发展(海洋经济发展)海洋六大产业专项重点项目(GDOE[2019]A46);2022年省级促进经济高质量发展(海洋经济发展)海洋六大产业专项重点项目(GDNRC[2022]48)。

摘　　要：本研究对海南黎安港海草床碳储量进行了评估,并对我国南海区近岸现存海草床总碳储量进行了估算。结果显示,黎安港海草床中海草植物碳储量、100cm深度沉积物碳储量和总碳储量分别为(179.75±102.28) MgC、(7795.86±2923.75)MgC和(7975.61±2907.15)MgC;南海区近岸现存海草床总储碳量约为357 008.86 Mg C。研究发现,黎安港沉积物有机碳含量平均值为0.56%±0.25%,海草植物储碳密度为(1.60±0.91)MgC·ha^(-1),100cm深度沉积物储碳密度为(69.61±26.11)MgC·ha^(-1),均明显低于全球平均值(分别为2.50%、2.52 Mg C·ha^(-1)和139.70 Mg C·ha^(-1))。黎安港有些裸滩区域沉积物有机碳含量和储碳密度要高于相邻的海草生长区,鉴于海草生长区与其周边一些裸滩区域存在有机碳的交换转移,建议将海草生长区周边的一些裸滩区沉积物碳储量也纳入海草床总碳储量。This study evaluated the organic carbon(Corg) storage in Li’an Bay(Hainan) seagrass beds and estimated the total Corgstorage in the seagrass beds of the South China Sea. The results showed that the seagrass biomass Corgstorage, the top meter sediment Corgstorage, and the total Corgstorage in the Li’an Bay seagrass beds were(179.75±102.28) Mg C,(7, 795.86±2, 923.75) Mg C and(7, 975.61±2, 907.15) Mg C, respectively. The total Corgstorage in the seagrass beds was about 357, 008.86 Mg C. The mean sediment Corgcontent was 0.56%±0.25%, the mean seagrass biomass Corgdensity was 1.60±0.91 Mg C·ha^(-1), and the mean Corgdensity of the top meter sediment was 69.61±26.11 Mg C·ha^(-1)in Li’an Bay. All of these values were lower than the global averages(2.50%,2.52 Mg C·ha^(-1), and 139.70 Mg C·ha^(-1), respectively). The Corgcontent and Corgdensity of the sediments in some barren tidal flats(unvegetated) were higher than those in vegetated areas of Li’an Bay, as Corgexchange occurred between the vegetated areas and the adjacent barren tidal flat. These results recommend including the sediment Corgstorage of the barren tidal flat in the total Corgstorage of seagrass beds.

关 键 词：海草床 碳储量 裸滩 黎安港 南海 

分 类 号：P76[天文地球—海洋科学]