摘要
利用2000年、2010年、2020年3期土地利用遥感监测数据,通过景观格局指数、区域生态环境质量指数定量探究长江经济带土地景观格局的时空变化特征及其生态环境响应。研究表明:(1)长江经济带上、中、下游区域的林地、草地等生态用地与人造地表的分布存在空间错位,生态用地主要转为耕地和人造地表;(2)景观层级上,斑块的聚合度降低、破碎化程度加剧、多样性程度有所增加,类型层级上,耕地的破碎化程度增加,人造地表在空间上的连接度加强,趋于规模发展;(3)2000—2020年,经济带生态环境质量改善和恶化并存的特征弱化了整体生态质量的时间变异性,生态环境质量指数的低值区与长江经济带三大城市群的分布存在空间布局相似性;(4)区域土地资源供给与发展水平的空间错位、土地利用主导功能转型下的生态变化、人口虹吸效应、产业结构等影响长江经济带生态环境的空间分布。
Based on the Landsat TM remote sensing images of 2000,2010,and 2020,landscape pattern index,index of regional ecological environment quality were used to explore the temporal and spatial variation characteristics of land landscape pattern and the response law of landscape ecological environment in the Yangtze River Economic Belt.The results showed 1)The spatial distribution of forest land,grassland and other ecological land in the upper,middle and lower reaches of the Yangtze River Economic Belt is misplaced with the spatial distribution of man-made surface.The main transfer direction of ecological land is cultivated land and man-made surface.2)At the landscape level,the index of aggregation degree decreased,the index of fragmentation degree and the index of diversity increased from 2000 to 2020.At the class level,the degree of fragmentation of cultivated land increased,and the spatial connection of the manmade surface was continuously strengthened,which tends to develop on a large scale.3)From 2000 to 2020,the the coexistence of the ecological improvement trend and the ecological deterioration trend of the ecological environment quality weakens the temporal variability of the overall ecological environment.Spatially,the low-value area of the ecological environment quality index is closely related to the spatial pattern of the three major urban agglomerations in the Yangtze River Economic Belt.4)The changes in the ecological environment under the transformation of the dominant function of land use,the side effects of the population siphon effect,and the industrial structure affected the spatial distribution of the ecological environment of urban agglomerations.
作者
马小雪
吴昊
秦伯强
王腊春
Ma Xiaoxue;Wu Hao;Qin Boqiang;Wang Lachun(College of Geosciences,Jiangsu Second Normal University,Nanjing 210013,Jiangsu,China;Green Economy Development Institute,Nanjing University of Finance and Economics,Nanjing 210023,Jiangsu,China;Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,Jiangsu,China;School of Oceanographic Sciences,Nanjing University,Nanjing 210093,Jiangsu,China)
出处
《地理科学》
CSSCI
CSCD
北大核心
2022年第10期1706-1716,共11页
Scientia Geographica Sinica
基金
江苏第二师范学院引进高层次人才科研启动经费(921001)
中国科学院战略性先导科技专项(A类)项目(XDA230402)资助。
关键词
长江经济带
景观格局
景观指数
生态环境响应
the Yangtze River Economic Belt
landscape pattern
landscape index
ecological environment response
