Sediment microbes mediate the impact of nutrient loading on blue carbon sequestration by mixed seagrass meadows
Liu, SL; Jiang, ZJ; Zhang, JP; Wu, YC; Huang, XP; Macreadie, PI; xphuang@scsio.ac.cn
2017
发表期刊SCIENCE OF THE TOTAL ENVIRONMENT
卷号599页码:1479-1484
摘要Recent studies have reported significant variability in sediment organic carbon (SOC) storage capacity among seagrass species, but the factors driving this variability are poorly understood, limiting our ability to make informed decisions about which seagrass types are optimal for carbon offsetting and why. Here we show that differences in SOC storage capacity among species within the same geomorphic environment can be explained (in part) by below-ground processes in response to nutrient load; specifically, differences in the activity of microbes harboured by morphologically-different seagrass species. We found that increasing nutrient load enhanced the relative contribution of seagrass and algal sources to SOC pools, boosting sediment microbial biomass and extra cellular enzyme activity within mixed seagrass meadows composed of Thalassia hemprichii and Enhalus acoroides, and thus possibly weaken the seagrass blue carbon sequestration capacity. The relative contribution of seagrass plant material to sediment bacterial organic carbon (BOC) and the influencing SOC-decomposing enzymes in E. acoroides meadows were half that of T. hemprichii meadows living side-by-side, even though the mixed seagrass meadows received SOC from the same sources. Overall this research suggests that microbial activity can vary significantly among seagrass species, thereby causing fine-scale (within-meadow) variability in SOC sequestration capacity in response to nutrient load. (C) 2017 Elsevier B.V. All rights reserved.
部门归属[Liu, Songlin; Jiang, Zhijian; Zhang, Jingping; Wu, Yunchao; Huang, Xiaoping] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China; [Liu, Songlin; Wu, Yunchao; Huang, Xiaoping] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Liu, Songlin; Macreadie, Peter I.] Deakin Univ, Sch Life & Environm Sci, Fac Sci Engn & Built Environm, Burwood, Vic 3125, Australia
关键词Carbon Sequestration Thalassia Hemprichii Enhalus Acoroides Microbes
资助项目LMB
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16314
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
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GB/T 7714
Liu, SL,Jiang, ZJ,Zhang, JP,et al. Sediment microbes mediate the impact of nutrient loading on blue carbon sequestration by mixed seagrass meadows[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,599:1479-1484.
APA Liu, SL.,Jiang, ZJ.,Zhang, JP.,Wu, YC.,Huang, XP.,...&xphuang@scsio.ac.cn.(2017).Sediment microbes mediate the impact of nutrient loading on blue carbon sequestration by mixed seagrass meadows.SCIENCE OF THE TOTAL ENVIRONMENT,599,1479-1484.
MLA Liu, SL,et al."Sediment microbes mediate the impact of nutrient loading on blue carbon sequestration by mixed seagrass meadows".SCIENCE OF THE TOTAL ENVIRONMENT 599(2017):1479-1484.
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