大运河扬州段沿线区域景观格局与生态系统服务的变化特征  

Evolution characteristics of landscape pattern and ecosystem services in areas along the Yangzhou section of the Grand Canal during 2000-2018

作　　者：李兆哲 车通 唐欣 李成 周超[1] 罗云建[1] 钟磊[1] 禹文东 徐勇 LI Zhaozhe;CHE Tong;TANG Xin;LI Cheng;ZHOU Chao;LUO Yunjian;ZHONG Lei;YU Wendong;XU Yong(College of Horticulture and Plant Protection,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学园艺与植物保护学院,江苏扬州225009

出　　处：《扬州大学学报（农业与生命科学版）》2022年第3期132-137,144,共7页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：江苏省自然科学基金资助项目(BK20180939);扬州大学中国大运河研究院2019年度开放课题(2019-03);扬州市重点研发项目社会发展专项(YZ2019051);扬州市2019年度市级社科重点课题(扬社联[2019]27号);扬州市“绿扬金凤计划”项目(2020-08)。

摘　　要：基于遥感与地理信息系统技术,选取4个景观格局指数(边缘密度、平均形状指数、蔓延度指数和香浓多样性指数),分析2000—2018年大运河扬州段沿线区域土地利用与景观格局的变化特征及其生态效应。结果表明:(1)耕地、水域和城镇用地是沿线区域主要的土地利用类型,近19年城镇用地面积迅速扩张,增加比例为126%,而耕地面积快速减小。(2)受土地利用变化的影响,沿线区域的斑块连接度不断减小,景观异质性和复杂性逐步增大,景观破碎化趋势日益凸显。(3)近19年区域生态系统服务出现不同程度的下降趋势。相关性分析表明,景观破碎化程度的加深不利于生态系统服务的提升。这一研究为大运河扬州段沿线区域土地资源高效利用提供了科学依据。Based on remote sensing and geographic information system technology,four landscape pattern indexes(edge density,average shape index,spread index,and fragrant diversity index)were selected to analyze the land use and landscape pattern of the Yangzhou section of the Grand Canal from 2000 to 2018,and the relationships between landscape patterns and ecosystem services were also discussed.The results showed that:(1)cropland,water areas and urban land were the main types of land use in areas along the Yangzhou section of the Grand Canal,and their area proportion exceeded 95%.The area of urban land has expanded rapidly in the past 19 years,with an increase of 126%;while the area of cropland rapidly decreased,the process of urbanization developed rapidly.(2)Affected by land use changes,the patch connectivity deeclined and landscape heterogeneity gradually increased.The fragmentation of the landscape pattern was increasingly prominent in areas along the Yangzhou section of the Grand Canal.(3)Regional ecosystem services showed a downward trend of varying degrees in the past 19 years.Correlation analysis showed that the deepening of landscape fragmentation was not conducive to the improvement of ecosystem services.The results of this study provide an important scientific basis for optimizing the land use structure of the Yangzhou section of the Grand Canal.

关 键 词：土地利用 景观格局 生态系统服务 变化特征 大运河扬州段 

分 类 号：Q148[生物学—生态学]