水资源与水工程学报2025，Vol.36Issue(3)：89-98,10.DOI:10.11705/j.issn.1672-643X.2025.03.11
鄱阳湖洪泛湿地植被碳利用率时空格局演变及其对干旱的响应
Evolution of spatial and temporal patterns of vegetation carbon use efficiency in Poyang Lake floodplain wetlands and CUE response to drought
摘要
Abstract
To understand the carbon cycle process in wetland ecosystem,evaluate regional carbon budget and ecosystem service,we analyzed the spatiotemporal patterns of vegetation carbon use efficiency(CUE)in the Poyang Lake floodplain wetlands and its response to drought from 1986 to 2020.A long time-series NDVI dataset from multi-source remote sensing image fusion was used as the data input,and Carnegie-A-mes-Stanford approach(CASA)model and light use efficiency meta-model(LUE)were adopted for the analysis.The results show that CUE of vegetation declined by an average of 44.08%over the past 35 years,with 63.99%of the lake area showing a decrease.Spatially,the CUE followed the pattern of south-west>east>north lake areas;temporally,it followed summer>autumn>spring>winter.The CUE of Phragmites australis-Triarrhena lutarioriparia,Artemisia selengensis communities,and woodlands was relatively high,with an average ranging from 0.35 to 0.44.Compared with normal years,the CUE of vegetation in up to 69.11%of the Poyang Lake wetlands showed a decreasing trend during dry years.In particular,the CUE of all wetland vegetation types declined in summer,with the Carex cinerascens,Polygonum hydropiper-Phalis arundinacea communities showing the most pronounced average decrease of 0.16.In contrast,most wetland vegetation types exhibited a slight increase in CUE during spring and winter,especially the Polygonum hydropiper-Phalis arundinacea communities and woodlands.关键词
碳利用率(CUE)/时空格局/干旱效应/遥感数据融合/CASA模型/光能利用率集成模型/洪泛湿地/鄱阳湖Key words
carbon use efficiency(CUE)/spatial and temporal pattern/drought effect/multi-source re-mote sensing fusion/Carnegie-Ames-Stanford approach(CASA)model/light use efficiency meta-model(LUE)/floodplain wetland/the Poyang Lake分类
农业科技引用本文复制引用
袁灿煜,李相虎,张丹,蔺亚玲,谭志强,叶许春,孙童..鄱阳湖洪泛湿地植被碳利用率时空格局演变及其对干旱的响应[J].水资源与水工程学报,2025,36(3):89-98,10.基金项目
国家重点研发计划项目(2022YFC3204102) （2022YFC3204102）
赣鄱俊才支持计划-主要学科学术和技术带头人培养项目(20232BCJ22011) （20232BCJ22011）
国家自然科学基金项目(42171037、42171104) （42171037、42171104）
江苏省基础研究计划项目(BK20242106) （BK20242106）
