| 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、100 cm深度沉积物碳储量和总碳储量分别为179.75±102.28 Mg C、7795.86±2923.75 Mg C和7975.61±2907.15 Mg C；南海区近岸现存海草床总储碳量约为357008.86 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 Mg C/ha,100 cm深度沉积物储碳密度为69.61±26.11 Mg C/ha,均明显低于全球平均值(分别为2.50%、2.52 Mg C/ha和139.70 Mg C/ha)。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。 |
| 关键词: 海草床 碳储量 裸滩 黎安港 南海 |
| DOI： |
| 分类号: |
| 基金项目: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) |
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| Carbon storage in seagrass bed of Li"an Bay, Hainan |
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yang xi, Yu Wei, He Jing, Huang Sheng
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South China Sea Environmental Monitoring Center, State Oceanic Administration
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| Abstract: |
| This study evaluated the organic carbon (Corg) storage in seagrass bed of Li"an Bay of Hainan, and estimated the total Corg storage of seagrass beds in South China Sea. The results showed that the seagrass biomass Corg storage, the top meter sediment Corg storage, and the total Corg storage in seagrass bed of Li"an Bay were 179.75±102.28 Mg C, 7795.86±2923.75 Mg C and 7975.61±2907.15 Mg C, respectively. The total Corg storage of seagrass beds in South China Sea was about 357008.86 Mg C. This study found that the mean sediment Corg content was 0.56±0.25%, the mean seagrass biomass Corg density was 1.60±0.91 Mg C/ha, and the mean Corg density of the top meter sediment was 69.61±26.11 Mg C/ha in Li"an Bay, all of these were lower than the global average (2.50%, 2.52 Mg C/ha and 139.70 Mg C/ha, respectively). The Corg content and Corg density of sediments in some barren tidal flat (un-vegetated) were higher than vegetated areas in Li"an Bay. Since Corg exchange was existing between vegetated areas and the adjacent barren tidal flat. It is recommended to include the sediment Corg storage of barren tidal flat into total Corg storage in seagrass beds. |
| Key words: seagrass bed carbon storage barren tidal flat Li"an Bay South China Sea |