文献类型：期刊文献

英文题名：The Nitrogen Removal Ability of Salt Marsh Improved After Grazing Prohibition

作者：Li, Niu[1,2,3] Nie, Ming[2,3] Wu, Ming[1] Wu, Jihua[2,3]

第一作者：李妞;Li, Niu

通信作者：Wu, JH[1];Wu, JH[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou, Peoples R China;[2]Fudan Univ, Sch Life Sci, Inst Biodivers Sci, Minist Educ,Key Lab Biodivers Sci & Ecol Engn,Coas, Shanghai, Peoples R China;[3]Fudan Univ, Sch Life Sci, Inst Ecochongming, Shanghai, Peoples R China

年份：2022

卷号：9

外文期刊名：FRONTIERS IN MARINE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000834552700001)】；

语种：英文

外文关键词：grazing prohibition; nitrification; denitrification; salt marshes; Chongming Island

摘要：Grazing prohibition has been used for some conservation purposes in salt marshes. However, the impact of this measure on microbe-mediated key nitrogen removal processes remains poorly understood. Therefore, this study assessed the impact of grazing prohibition on potential rates of nitrification and denitrification under short- and long-term grazing prohibition in high and middle elevation of the Dongtan salt marsh on Chongming Island, China. Compared with short-term grazing prohibition, we found that long-term grazing prohibition significantly increased nitrification and denitrification (except for nitrification in the high marsh), which indicates that the nitrogen removal ability of the salt marsh was improved along with the grazing prohibition time. Furthermore, we found that nitrification and denitrification in the high marsh were largely affected by NH4+ and soil moisture, respectively. Nitrification and denitrification in the middle marsh were mainly controlled by soil organic carbon (SOC) and nirS gene abundances, respectively. Our results indicate that the implementation of scientific and reasonable grazing prohibition policies in salt marshes has great potential to restore their ecosystem functions, maintain their ecosystem balance and realize their sustainable development.