洞庭湖流域生境质量对LUCC的动态响应  

Dynamic responses of habitat quality to LUCC in the Dongting Lake basin

作　　者：韩宇 毛逸飞 杨伶[1] 王金龙[1] 周文强 HAN Yu;MAO Yifei;YANG Ling;WANG Jinlong;ZHOU Wenqiang(Key Laboratory for Digital Dongting Lake Basin of Hunan Province,Central South University of Forestry&Technology,Changsha 410004,Hunan,China;College of Economics and Management,Southwest University,Chongqing 400715,China)

机构地区：[1]中南林业科技大学数字洞庭湖南省重点实验室,湖南长沙410004 [2]西南大学经济管理学院,重庆400715

出　　处：《中南林业科技大学学报》2023年第6期148-157,共10页Journal of Central South University of Forestry & Technology

基　　金：国家社科基金一般项目(22BJY094);湖南省自然科学基金面上项目(2022JJ30080);教育部人文社会科学研究一般项目(19YJC630166);中国博士后科学基金项目(2021M693573);湖南省社会科学基金项目(18YBA462);湖南省教育厅创新平台开放基金项目(19K108)。

摘　　要：【目的】探究洞庭湖流域生境质量对土地利用变化的响应机制,为该流域生态环境保护和可持续发展提供参考依据。【方法】基于洞庭湖流域1980—2018年土地利用数据,运用InVEST模型进行生境质量定量评估,并采用地理加权回归模型探究生境质量变化对耕地、林地、草地、水域和建设用地的响应。【结果】1)近40年间洞庭湖流域土地利用类型以耕地和林地为主,呈现出耕地持续萎缩、林地基本稳定和建设用地持续扩张等主要特征,以耕地与林地之间的内部转移及向建设用地转移为主要变化方向;2)洞庭湖流域生境质量水平虽整体处于较高水平,但持续变差,东南西三面环山地带生境质量最高,环洞庭湖平原、湘中南丘陵地区和武陵—雪峰山脉山地生态农业带生境质量次之,各大中城市和小城镇的建成区生境质量最低;3)生境质量对各地类的响应具有显著的时空异质性,林地、草地和水域总体对生境质量产生正面影响,耕地和建设用地与生境质量基本上呈负相关,但各地类在局部地区均存在反向影响。【结论】三面环山地带生境质量变化主要受林地变化的影响,洞庭湖及“湘、资、沅、澧”四水的河谷湖盆和冲积平原生境质量变化的主导地类则为耕地和建设用地。因此,在制定洞庭湖流域生态环境保护政策时,三面环山地带应以生态保护为首要任务,耕地分布较广区域应加快发展生态农业和循环农业,城市化地区应注重土地利用结构生态型和稳定性的提升。【Objective】By exploring the response mechanism of habitat quality to land use changes in the Dongting Lake basin,this article aimed to provide a reference for the protection and sustainable development of the ecological environment.【Method】Based on the land use data of the Dongting Lake(DTL)basin from 1980 to 2018,this paper quantitatively evaluated the habitat quality by using InVEST model and analyzed the response of the change of habitat quality to cropland,woodland,grassland,water area and builtup land based on the geographically weighted regression(GWR)model.【Result】1)Cropland and woodland were the main types of land use in the DTL basin,which showed the main characteristics of continuous shrinking of cropland,basic stability of woodland,and the continuous expansion of construction land.The main changing direction was the internal transfer between cropland and woodland and their transfer to construction land;2)The overall habitat quality in the Dongting Lake basin was at a high level,which continued to deteriorate.The habitat quality was the highest in the mountain belt on the east,south and west sides of the DTL basin,followed by the plain around the Dongting Lake,the hilly area in central and southern Hunan and the mountain ecological agricultural belt of Wuling-Xuefeng mountains,and the lowest habitat quality was in the urbanization areas of large and medium-sized cities and small towns;3)The response of habitat quality to each land type had significant spatiotemporal heterogeneity,and the change of woodland,grassland and water area was positively correlated with the overall habitat quality,cropland and construction land were negatively correlated with habitat quality,and each land type had a negative impact in some local areas.【Conclusion】The change of habitat quality in mountainous regions was mainly affected by the woodland change,while the dominant land for habitat quality change in Dongting Lake and the river valley basin and alluvial plain of Xiang, Zi, Yuan and Li rivers was croplan

关 键 词：生境质量 土地利用变化 InVEST模型 地理加权回归模型 洞庭湖流域 

分 类 号：S718.53[农业科学—林学]