粤北山区县土地利用变化及其对生态系统服务功能的影响研究——以广东省怀集县为例

Study on Land Use Change in Mountainous Counties of Northern Guangdong and Its Impact on Ecosystem Services:a Case Study of Huaiji County Guangdong Province

经济和生态环境的可持续发展已经上升为国家现代化建设进程的一项重要内容。本文通过对粤北山区县怀集县2009-2018年间土地利用及其生态系统服务价值的变化进行分析,对当地可持续发展具有重要意义。研究表明,(1)怀集县的土地利用结构不平衡分布特征明显,土地利用类型结构总体表现为“多保一”的特点。(2)怀集县各地类都有向建设用地转移,而林地、耕地、草地和水域用地为主要土地类型大量转出流入到建设用地。(3)在研究期间,怀集县各项生态功能的生态价值均发生不同程度的变化,其中食物生产的生态价值经历了先增加后减少的过程,土壤形成与保护、水源涵养、气体调节、生物多样性保护、气候调节、原材料、废物处理以及娱乐文化的生态价值均在不断减少,主要是相对应的生态土地类型面积流入到建设用地,造成生态系统服务价值的下降。

To realize the coordinated development of economic development and ecological environmental protection has become a major focus of the country's modermization drive.The study on the value of land use change During the period of 2009-2018 to regional ecosystem service function in Huaiji County is of great significance for local sustainable development.Research shows that,(1)the land use structure of Huaiji County showed unbalanced distribution characteristics,the land use type structure of Huaiji County showed the characteristics of"Multiple types guarantee one type".(2)All kinds of land in Huaiji County were transferred to construcion land,and woodland,cultivated land,grassland and water area were the main land types.(3)During the study period,the ecological value of various ecological functions in Huaiji County changed to varying degrees.The ecological value of food production increased first and then decreased.The ecological value of soil formation and protection,water conservation,gas regulation,biodiversity protection,climate regulation,raw materials,waste treatment and entertainment culture all decreased continuously.Mainly,the corresponding ecological land type area flows into the construction land,resulting in the decline of ecosystem service value.