Eutrophication indirectly reduced carbon sequestration in a tropical seagrass bed
Jiang, ZJ; Liu, SL; Zhang, JP; Wu, YC; Zhao, CY; Lian, ZL; Huang, XP; xphuang@scsio.ac.cn
2018
发表期刊PLANT AND SOIL
卷号426期号:2018-01-02页码:135-152
摘要Aims Seagrass beds occur globally and are substantial blue carbon sinks, yet factors that affect sediment organic carbon (SOC) sequestration are poorly characterized. We investigated the influences of eutrophication on SOC sequestration capacity in a mixed seagrass bed dominated by Thalassia hemprichii and Enhalus acoroides. Methods We surveyed a tropical seagrass bed in the South China Sea along fish farming-induced gradients of nutrients to assess the variability of SOC content and composition in 30-cm-long sediment cores. Results No significant difference was observed for the SOC content and stock between the two species. Significantly higher microbial biomass carbon and SOC density were observed at the surface 3 cm layer under E. acoroides, and the longer roots of E. acoroides enhanced the seagrass contribution to the SOC near the root tip. SOC had a statistically lower concentration in the sediment layers where the seagrass roots primarily thrive close to fish farming, but greater exchangeable organic carbon was found in all the sediment layers as they approached fish farming. Nutrient enrichment markedly induced a larger ratio of labile C pools in almost all sediment layers. The mean SOC stock in the seagrass bed in Xincun Bay was 6.80 +/- 1.03 Mg C/ha, and it showed insignificant variation along the nutrient gradient. Conclusions Eutrophication may indirectly reduce the SOC sequestration capacity in the seagrass bed by enhancing labile organic carbon with a shorter resident time, and measures should be taken to reduce nutrient input into the seagrass bed to enhance its carbon sink.
部门归属[Jiang, Zhijian; Liu, Songlin; Zhang, Jingping; Wu, Yunchao; Zhao, Chunyu; Lian, Zhonglian; Huang, Xiaoping] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China; [Jiang, Zhijian; Liu, Songlin; Zhang, Jingping; Wu, Yunchao; Zhao, Chunyu] Chinese Acad Sci, Trop Marine Biol Res Stn Hainan, Sanya 572200, Peoples R China; [Liu, Songlin; Wu, Yunchao; Zhao, Chunyu; Lian, Zhonglian; Huang, Xiaoping] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Lian, Zhonglian] State Ocean Adm, South China Sea Environm Monitoring Ctr, Guangzhou 510300, Guangdong, Peoples R China
学科领域Agriculture ; Plant Sciences
关键词[WOS]Seagrass bed ; Sediment organic carbon ; Labile organic carbon ; Nutrient enrichment ; Blue carbon
资助项目LMB
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16960
专题中科院海洋生物资源可持续利用重点实验室
通讯作者xphuang@scsio.ac.cn
推荐引用方式
GB/T 7714
Jiang, ZJ,Liu, SL,Zhang, JP,et al. Eutrophication indirectly reduced carbon sequestration in a tropical seagrass bed[J]. PLANT AND SOIL,2018,426(2018-01-02):135-152.
APA Jiang, ZJ.,Liu, SL.,Zhang, JP.,Wu, YC.,Zhao, CY.,...&xphuang@scsio.ac.cn.(2018).Eutrophication indirectly reduced carbon sequestration in a tropical seagrass bed.PLANT AND SOIL,426(2018-01-02),135-152.
MLA Jiang, ZJ,et al."Eutrophication indirectly reduced carbon sequestration in a tropical seagrass bed".PLANT AND SOIL 426.2018-01-02(2018):135-152.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Eutrophication indir(2846KB)期刊论文作者接受稿开放获取CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。