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洞庭湖流域碳储量的时空异质性及驱动力分析

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基于遥感反演和模型修正法，动态分析1980～2020年洞庭湖流域生态系统碳储量的时空分布特征，并借助碳储量贡献率和最优参数地理探测器，量化分析生态系统相互转换以及自然-社会-政策环境对碳储量时空异质性的驱动机制。结果表明:40a来洞庭湖流域及其子流域碳储量先降后升，整体增长262。81Tg，呈现由东-南-西三面向中部、北部逐级递减的"马蹄形"格局;生态系统相互转换推动洞庭湖流域碳储量增长了 23。66Tg，其中农田、森林和城镇生态系统间的相互转换主导碳储量变化;洞庭湖流域及其子流域碳储量的时空异质性主要受社会环境和政策环境的协同影响，其中生境质量和人口密度是主导因素。由于存在增强效应和差异化特征，使得双因子交互作用的影响更强烈。为提高生态系统固碳能力，应加快完善洞庭湖流域的生态系统结构，因地制宜构建生态与社会的良性互动关系。
Spatiotemporal heterogeneity and driving forces of carbon storage in the Dongting Lake Basin
Based on remote sensing inversion method and model modification method,the spatiotemporal distribution characteristics of ecosystem carbon storage in the Dongting Lake Basin were dynamically analyzed from 1980 to 2020.And with the help of the carbon storage contribution rate and optimal parameters-based geographical detector model,the driving mechanisms of ecosystem interconversion and natural-social-policy environments on the spatiotemporal heterogeneity of carbon storage were quantitatively analyzed.Carbon storage in the Dongting Lake Basin and its sub-basins initially decreased and then increased in the past 40years,with an overall increase of 262.8 1Tg,showing a"horseshoe"pattern of decreasing from the east-south-west to the central and northern parts of the basin.The interconversion of ecosystems promoted the growth of carbon storage by 23.66Tg,of which the interconversion among farmland,forest and urban ecosystems dominated the change of carbon storage in the basin.The spatiotemporal heterogeneity of carbon storage in the Dongting Lake Basin and its sub-basins was primarily influenced by the synergistic effects of social and policy environments,with the habitat quality and population density being the dominant factors.The enhancement effect and differentiation characteristics make the two-factor interaction stronger.In order to improve the carbon sequestration capacity of ecosystem,the improvement of the Dongting Lake Basin'ecosystem structure should be accelerated and the positive interaction between ecology and society should be constructed according to local conditions.

carbon storagedynamic assessmentspatiotemporal heterogeneitydriving mechanismDongting Lake Basin

周文强、韩宇、王金龙、杨伶、阙华斐

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中南林业科技大学林学院,湖南长沙 410004

北京林业大学经济管理学院,北京 100083

中南林业科技大学商学院,湖南长沙 410004

湖南省生态文明建设研究基地,湖南长沙 410004

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碳储量 动态评估 时空异质性 驱动机制 洞庭湖流域

国家社会科学基金一般项目教育部人文社会科学研究一般项目湖南省自然科学基金面上项目湖南省教育厅科学研究重点项目长沙市软科学项目中国博士后科学基金资助项目湖南省社会科学成果评审委员会课题

22BGL16919YJC6301662022JJ3008022A0174kh23020032021M693573XSP22YBC221

2024

中国环境科学
中国环境科学学会

中国环境科学

CSTPCDCHSSCD北大核心
影响因子：2.174
ISSN：1000-6923
年,卷(期)：2024.44(4)
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