Effects of nutrient load on microbial activities within a seagrass-dominated ecosystem: Implications of changes in seagrass blue carbon
Liu, SL; Jiang, ZJ; Wu, YC; Zhang, JP; Arbi, I; Ye, F; Huang, XP; Macreadie, PI; xphuang@scsio.ac.cn
2017
发表期刊MARINE POLLUTION BULLETIN
卷号117期号:1-2页码:214-221
摘要Nutrient loading is a leading cause of global seagrass decline, triggering shifts from seagrass-to macroalgal-dominance. Within seagrass meadows of Xincun Bay (South China Sea), we found that nutrient loading (due to fish farming) increased sediment microbial biomass and extracellular enzyme activity associated with carbon cyding (polyphenol oxidase, invertase and cellulase), with a corresponding decrease in percent sediment organic carbon (SOC), suggesting that nutrients primed microorganism and stimulated SOC remineralization. Surpisingly, however, the relative contribution of seagrass-derived carbon to bacteria (delta C-13(bacteria)) increased with nutrient loading, despite popular theory being that microbes switch to consuming macroalgae which are assumed to provide a more labile carbon source. Organic carbon sources of fungi were unaffected by nutrient loading. Overall, this study suggests that nutrient loading changes the relative contribution of seagrass and algal sources to SOC pools, boosting sediment microbial biomass and extracellular enzyme activity, thereby possibly changing seagrass blue carbon. (C) 2017 Elsevier Ltd. All rights reserved.
部门归属[Liu, Songlin; Jiang, Zhijian; Wu, Yunchao; Zhang, Jingping; Arbi, Iman; 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; Arbi, Iman; Huang, Xiaoping] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Ye, Feng] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China; [Macreadie, Peter Ian] Deakin Univ, Fac Sci Engn & Built Environm, Ctr Integrat Ecol, Sch Life & Environm Sci,Blue Carbon Lab, Burwood, Vic 3125, Australia
关键词Seagrass Bed Sediment Organic Carbon Extracellular Enzymes Activities Pifa Microbial Community Structure Delta C-13
资助项目LMB
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16264
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
Liu, SL,Jiang, ZJ,Wu, YC,et al. Effects of nutrient load on microbial activities within a seagrass-dominated ecosystem: Implications of changes in seagrass blue carbon[J]. MARINE POLLUTION BULLETIN,2017,117(1-2):214-221.
APA Liu, SL.,Jiang, ZJ.,Wu, YC.,Zhang, JP.,Arbi, I.,...&xphuang@scsio.ac.cn.(2017).Effects of nutrient load on microbial activities within a seagrass-dominated ecosystem: Implications of changes in seagrass blue carbon.MARINE POLLUTION BULLETIN,117(1-2),214-221.
MLA Liu, SL,et al."Effects of nutrient load on microbial activities within a seagrass-dominated ecosystem: Implications of changes in seagrass blue carbon".MARINE POLLUTION BULLETIN 117.1-2(2017):214-221.
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