Effects of plant invasion and land use change on soil labile organic carbon in southern China’s coastal wetla  

作　　者：Lihua Wang Wenjing Liu Xueya Zhou Shenglei Fu Ping Yang Chuan Tong Hong Yang Dongyao Sun Linhai Zhang Wanyi Zhu Kam W.Tang 

机构地区：[1]Institute of Geography,Fujian Normal University,Fuzhou 350117,China [2]School of Geographical Sciences,Fujian Normal University,Fuzhou 350117,China [3]Fujian Provincial Key Laboratory for Subtropical Resources and Environment,Fujian Normal University,Fuzhou 350117,China [4]Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions,College of Environment and Planning,Henan University,Jinming Avenue,Kaifeng 475004,China [5]Henan Dabieshan National Field Observation&Research Station of Forest Ecosystem,Xinyang 464039,China [6]Department of Geography and Environmental Science,University of Reading,Reading RG66AH,UK [7]School of Geography Science and Geomatics Engineering,Suzhou University of Science and Technology,Suzhou 215009,China [8]Department of Life Sciences,Texas A&M University-Corpus Christi,TX 78412,USA

出　　处：《Soil Ecology Letters》2025年第1期133-143,共11页土壤生态学快报(英文)

基　　金：funded jointly by the Natural Science Foundation of Fujian Province,China(Grant Nos.2022R1002006 and 2022R1002007);Graduate Innovation Foundation of School of Geographical Sciences,Fujian Normal University,the National Natural Science Foundation of China(Grant Nos.42371100 and 41801070);Henan Province Science Foundation for Youths of China(Grant Nos.232300421256).

摘　　要：Labile organic carbon(LOC)plays a pivotal role in soil biogeochemistry and ecological functions.China’s coastal wetlands have been profoundly impacted due to plant invasion and land use change,but the effects on soil LOC quantity and composition are unclear.This study analyzed the soil LOC components—namely,dissolved organic carbon(DOC),easily oxidizable carbon(EOC),and microbial biomass carbon(MBC)—across twenty-one coastal wetlands in southeastern China.These wetlands underwent a uniform land cover transition from native mudflats(MFs)to Spartina alterniflora marshes(SAs),and eventually to aquaculture ponds(APs).The results indicated that EOC was the dominant component of soil organic carbon(SOC)(57.5%–61.6%),followed by MBC(3.5%–4.5%)and DOC(<0.5%).The transition from MFs to SAs led to a rise in mean EOC and DOC by 18.6%and 41.4%,respectively.Subsequent conversion of SAs to APs resulted in a reduction in mean EOC and DOC by 5.9%and 20.3%,respectively.MBC did not differ significantly among habitat types.Total nitrogen availability was the main driver of changes in LOC across both land cover change scenarios.The mineralization rate of SOC were more strongly correlated with DOC than EOC and MBC.Microbial turnover of EOC was temperature dependent across the geographical range.These finds highlighted that plant invasion and land use change affected LOC fractions and subsequent SOC stability and carbon emissions in coastal wetlands.

关 键 词：labile organic carbon(LOC) dissolved organic carbon(DOC) microbial biomass carbon(MBC) carbon stock plant invasion aquaculture reclamation 

分 类 号：TN9[电子电信—信息与通信工程]