水生态学杂志2025，Vol.46Issue(4)：85-95,11.DOI:10.15928/j.1674-3075.202307090186
闽江流域碳汇空间特征及驱动因素分析
Spatial Distribution and Drivers of the Carbon Sink in Minjiang River Basin
摘要
Abstract
In this study,the Minjiang River basin was selected for research,and the vegetative carbon sink in the basin was calculated to estimate net primary production(NPP)using the modified CASA(Carnegie-Ames-Stanford Approach)model and a soil microbial respiration model.Input data for the model came from multiple sources for the basin in 2020,including data on meteorology,land use,soil or-ganic carbon,elevation(DEM)and socioeconomics.The carbon source regions were then classified as low,medium and high carbon sink regions based on model results.The spatial distribution of carbon sources and sinks in the basin,and the driving factors affecting their distribution were discussed.Our ob-jective was to provide a theoretical basis for improving the benefits of the carbon sink.Results show that:(1)The net vegetation productivity(PNE)in the Minjiang River basin generally provided a medium or high carbon sink.The medium carbon sink area was the most widely and evenly distributed in the basin.The high carbon sink area was primarily distributed in the southeast and river valley regions.The low car-bon sink area was primarily distributed along the water,traffic networks and in the peripheral areas of cit-ies and counties.Carbon source areas were scattered in the central urban areas of each city and county.(2)Carbon source area decreased with increasing altitude,and the proportion of high carbon sink area in-creased initially and then decreased with altitude.Carbon sequestration varied markedly with land use,with the high carbon sink area concentrated primarily in forest land,and the carbon source area mainly concentrated in water,bare land and construction land.(3)Land use type was the main driver of carbon sink spatial distribution in the Minjiang River basin and its upper and middle reaches,while human ac-tivity was the main driver in the lower reaches of the basin.The interactive explanatory power of any two factors was clearly greater than any single factor.Among factors,the synergistic effect of natural and so-cioeconomic factors had the strongest influence on the spatial distribution of the carbon sink in Minjiang River basin.关键词
碳汇/CASA模型/归一化植被指数/净生态系统生产力/闽江流域Key words
carbon sink/CASA model/normalized differential vegetation index(NDVI)/net ecosystem productivity(PNE)/Minjiang River basin分类
农业科技引用本文复制引用
胡晓婷,施智勇,程飞,谢慧黎,武艳芳,刘兴诏..闽江流域碳汇空间特征及驱动因素分析[J].水生态学杂志,2025,46(4):85-95,11.基金项目
福建省自然资源科技创新项目(KY-090000-04-2021-012) （KY-090000-04-2021-012）
国家自然科学基金(31800401). （31800401）
