• 关键词：土地利用  景观格局  鄱阳湖  变化  支持向量机  Landsat遥感卫星影像

• 基金项目：中国科学院战略性先导科技专项（A类）（No.XDA23040203）；国家自然科学基金（No.32071572）；长江水生生物完整性评价指标体系研究项目（No.202003229）；中国科学院青年创新促进会项目（No.2020316）

• 温玉玲
• 南京师范大学地理科学学院，南京 210023

• 李红波
• 南京师范大学地理科学学院，南京 210023;江苏省地理信息资源开发与利用协同创新中心，南京 210023

• 张小林
• 南京师范大学地理科学学院，南京 210023;江苏省地理信息资源开发与利用协同创新中心，南京 210023

• 王晓龙
• 中国科学院南京地理与湖泊研究所，中国科学院流域地理学重点实验室，南京 210008

• 黄琪
• 江西师范大学鄱阳湖湿地与流域研究教育部重点实验室，南昌 330022

• 蔡永久
• 中国科学院南京地理与湖泊研究所，中国科学院流域地理学重点实验室，南京 210008

• 摘要：以1988—2018年7期Landsat遥感卫星影像为数据源，采用土地利用转移矩阵、景观格局指数等方法探究了鄱阳湖环湖区近30年来土地利用与景观格局变化特征.结果表明：①近30年来鄱阳湖环湖区建设用地和林地面积显著增加，耕地、草地、水域和未利用地面积减少.②建设用地的转入类型以耕地为主，30年间共侵占耕地面积1243.66 km²，占建设用地面积增加量的71.19%.林地的转入类型主要为耕地和草地，其中，耕地转入占比56.95%.耕地的转出类型以建设用地、草地和林地为主，且1999年以后随着城镇化的发展耕地主要转向建设用地.③近30年来鄱阳湖环湖区景观总体破碎程度逐渐增大，景观斑块个数共增加63492个，增幅为11.68%.景观连通性降低，各类型土地呈均衡化趋势 分布，景观异质性增加.研究结果可为推动鄱阳湖环湖区土地资源保护、生态环境保护和经济协同发展提供参考依据.

• Abstract：Taking Landsat remote sensing satellite images of 7 periods from 1988 to 2018 as the data source， this paper uses the methods of land use transfer matrix and landscape pattern index to explore the characteristics of changes in land use and landscape pattern in the peripheral area of Poyang Lake in the past 30 years. The results show that： ①The area of construction land and forestland in the peripheral region of Poyang Lake has increased significantly in the past 30 years， while the area of cultivated land， grassland， water area and unused land has decreased. ② Cultivated land is the main type transferred into construction land， which has been occupied 1243.66 km² in the past 30 years， accounting for 71.19% of the increase of construction land area. The transfer-in types of forest land are mainly cultivated land and grassland， and the amount of the transfer-in of cultivated land accounts for 56.95%. The transfer-out types of cultivated land are mainly construction land， grassland and forestland. With the development of urbanization， the cultivated land has mainly transferred to construction land after 1999. ③The overall fragmentation of the landscape in the peripheral region of Poyang Lake has gradually increased in the past 30 years， and the number of landscape patches has increased by 63492 in total， indicating an increase of 11.68%. The landscape connectivity decreases， and each type of land distributes in a balanced trend， which means the landscape heterogeneity increases. The results of this study can provide a reference basis for promoting land resource conservation， ecological environmental protection and synergistic economic development in the peripheral region of Poyang Lake.

• Key words：land use  landscape pattern  Poyang Lake  change  support vector machine  Landsat remote sensing satellite

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