摘要
在国家新型城镇化、东北振兴取得新突破和推动共建“一带一路”高质量发展的背景下,哈长城市群作为东北地区最大的城市群,将面临更大的绿色、协调、可持续发展挑战。该研究基于30 m Landsat TM/OLI遥感影像数据分析了2000—2020年土地利用时空变化特征,结合景观干扰度指数和景观脆弱度指数,构建了景观生态风险指数,深入分析了哈长城市群20年景观生态风险变化特征,揭示了土地利用格局与景观生态风险之间相关性。结果表明:1)哈长城市群以耕地为主,主要分布在西北部地区,占比为46.62%。土地利用结构整体变化不大,其中耕地明显增加,水体明显减少。2)较高生态风险区占地面积最大,占比为32.66%,该风险区广泛分布着耕地、草地与建设用地等土地利用类型。由于草地的过度使用致使其荒漠化,导致这20年景观生态风险呈略微上升趋势。3)生态风险与林地呈明显的负相关关系,相关系数为-0.67,与耕地、草地、水体、建设用地及未利用地均呈正相关关系。林地减少与草地退化是生态风险指数上升的重要原因,不同生态风险管控区应采取不同的调控措施以降低生态风险。该研究揭示了增加景观生态风险的土地利用类型,为哈长城市群生态风险防控及新国土空间规划提供依据。
In the context of the new type of urbanization,the rejuvenation of Northeast China,and the promotion of high-quality development of the Belt and Road Initiative,the Ha-Chang Metropolitan Region,as the largest metropolitan region in Northeast China,will face greater challenges of green,coordinated,and sustainable development.This study analyzes the spatial-temporal characteristics of land use changes from 2000 to 2020 using 30meter Landsat TM/OLI remote sensing image data.combining landscape disturbance index and landscape vulnerability index,the Landscape Ecological Risk Index is constructed.The study deeply analyzes the 20 years landscape ecological risk changes in the Ha-Chang Metropolitan Region and reveals the correlation between land use patterns and landscape ecological risk.Results show that:1)Farmland is the main land use type in the Ha-Chang Metropolitan Region,mainly distributed in the northwest region,accounting for 46.62% of the total area.The overall land use structure changes little,with an obvious increase in farmland and a significant decrease in water bodies.2)Areas with high ecological risk account for the largest area,accounting for 32.66%,and are widely distributed with land use types such as farmland,grassland,and construction land.Due to the overuse of grassland leading to desertification,the landscape ecological risk has slightly increased over the past 20 years.3)There is a significant negative correlation between ecological risk and forest land,with a correlation coefficient of-0.67,and positive correlations with farmland,grassland,water bodies,construction land,and unused land.The reduction of forest land and degradation of grassland are important reasons for the increase in the ecological risk index.Different ecological risk control areas should adopt different control measures to reduce ecological risks.This study reveals the land use types that increase landscape ecological risk,providing a basis for ecological risk prevention and new national spatial planning in the Ha-Chang Metropolitan Region.
作者
徐妍
李明玉
余洲
XU Yan;LI Mingyu;YU Zhou(College of Geography and Ocean Sciences,Yanbian University,Yanji Jilin 133002,China)
出处
《延边大学农学学报》
2023年第4期64-73,83,共11页
Agricultural Science Journal of Yanbian University
基金
吉林省自然科学基金项目(20220101191JC)
国家自然科学基金项目(41461036)。
关键词
景观生态风险
土地利用变化
关联分析
哈长城市群
landscape ecological risk
land use change
correlation analysis
Ha-Chang Metropolitan Region
作者简介
徐妍(1999-),女,河北石家庄人,硕士研究生,研究方向为地图学与地理信息系统;通信作者:李明玉(1974-),女(朝鲜族),黑龙江梅林人,博士,教授,E-mail:leemy@ybu.edu.cn。
