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Effects of Aquaculture and Thalassia testudinum on Sediment Organic Carbon in Xincun Bay, Hainan Island  ( SCI-EXPANDED收录 EI收录)   被引量:1

文献类型:期刊文献

英文题名:Effects of Aquaculture and Thalassia testudinum on Sediment Organic Carbon in Xincun Bay, Hainan Island

作者:Han, Qiuying[1];Che, Wenxue[2];Zhao, Hui[2];Ye, Jiahui[1];Zeng, Wenxuan[1];Luo, Yufeng[1];Bai, Xinzhu[1];Zhao, Muqiu[1];Shi, Yunfeng[1]

机构:[1]Hainan Trop Ocean Univ, Yazhou Bay Innovat Inst,Minist Educ, Key Lab Utilizat & Conservat Trop Marine Bioresour, Key Lab Coastal Marine Ecoenvironm Proc & Carbon S, Sanya 572022, Peoples R China;[2]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524000, Peoples R China

年份:2024

卷号:16

期号:2

外文期刊名:WATER

收录:SCI-EXPANDED(收录号:WOS:001152736700001)、、EI(收录号:20240515457247)、Scopus(收录号:2-s2.0-85183330103)、WOS

基金:This research was supported by a high-level talented team project of the Natural Science Foundation of Hainan Province (420RC657), the National Natural Science Foundation of China(No. 42076162), the Key Research and Development Project of Hainan Province (ZDYF2023SHFZ100),and the Major Science and Technology Program Project of Yazhou Bay Innovation Research Institute of Hainan Institute of Tropical Oceanography (2022CXYZD002).

语种:英文

外文关键词:seagrass bed; sediment organic carbon; aquaculture; microbial diversity; Thalassia testudinum

外文摘要:Eutrophication due to aquaculture can cause the decline of seagrasses and impact their carbon storage capacity. This study explored the effects of aquaculture on the sediment organic carbon (SOC) in Thalassia testudinum seagrass beds using enzyme activity and microorganisms as indicators. Our results showed that the distance to aquaculture significantly increased the SOC and TN of sediments; the C/N ratio of sediments was reduced by the distance to aquaculture. Distance to aquaculture and seagrasses significantly impacted the delta C-13 of sediments, and their significant interactive effects on the delta C-13 of sediments were found. Distance to aquaculture and seagrasses had significantly interactive effects on the cellulase activity of sediments. Distance to aquaculture and seagrasses separately reduced the invertase activity of sediments. SOC in the seagrass bed was significantly positively impacted by cellulase activity and polyphenol oxidase activity in sediments. Firmicutes, Desulfobacterota and Chloroflexi were the dominant taxa in the S1 and S2 locations. From the S1 location to the S2 location, the relative abundances of Firmicutes and Desulfobacterota increased. The functional profiles of COG were relatively similar between the S1 and S2 locations. BugBase phenotype predictions indicated that the microbial phenotypes of all the seagrass sediment samples were dominated by anaerobic bacteria in terms of oxygen utilizing phenotypes. FAPROTAX functional predictions indicated that aquaculture affects functions associated with seagrass bed sediment bacteria, particularly those related to carbon and nitrogen cycling. This study can provide an important basis for understanding the response mechanism of global carbon sink changes to human activities such as aquaculture and supply more scientific data for promoting the conservation and management of seagrass beds.

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