摘要
南昌市正处于社会经济快速发展时期,土地利用的改变造成生态系统服务价值的变化,研究南昌市土地利用变化及其对生态系统服务的影响对未来城市的可持续发展具有重要意义。基于南昌市1995年、2005年和2015年3期土地利用数据,利用景观格局指数计算模型、生态系统服务价值指数模型和灰色关联分析模型,计算南昌市1995—2015年土地利用及生态系统服务价值的变化并分析了两者间的关联性。结果表明:1)1995—2015年南昌市建设用地和草地的变化率最大,变化率分别为103.50%和-21.71%;土地类型斑块破碎度增加,景观整体形状趋于规则化;2)21 a间,南昌市的生态系统服务价值总体呈现上升的趋势,其中水域提供了70%以上的生态系统服务价值,且生态系统服务价值较高区和中等区逐渐增加,生态系统较低区逐渐下降;3)耕地和林地面积下降是食物生产和维持养分循环功能下降的主要原因,水域面积增加是水文调节功能增加的主要原因,南昌市水域分布的分散是生态系统服务总价值上升的重要影响因素。
Nanchang city is in a period of rapid economic development,and the change of land use has resulted in great changes in ecosystem services.Therefore,it is of great significance to study the land use change of Nanchang city and its impact on ecosystem services for the sustainable development of the city in the future.Based on the land use data of Nanchang in 1995,2005 and 2015,using the landscape pattern index calculation model,ecosystem service value index model and grey correlation analysis model,the change of land use and ecosystem service value in Nanchang from 1995 to 2015 is calculated and the correlation between them is analyzed.The results showed that:1)from 1995 to 2015,the change rate of construction land and grassland in Nanchang was the largest,with the change rates of 103.50%and-21.71%,respectively;the fragmentation degree of land type patches increased,and the overall shape of landscape tended to be regular.2)In the past 21 years,the ecosystem service value of Nanchang city has been on the rise.The water area provides more than 70%of the ecosystem service value,and the higher and medium value areas of ecosystem service gradually increase,while the lower value areas of ecosystem gradually decrease.3)The decrease of cultivated land and forest land area is the main reason for the decline of food production and nutrient cycling function,the increase of water area is the main reason for the increase of hydrological regulation function,and the dispersion of water distribution in Nanchang city is an important factor affecting the rise of total ecosystem service value.
作者
李庆
张鹏
LI Qing;ZHANG Peng(Pingshan Center for Planning and Natural Resources in Shenzhen,518118,Shenzhen,Guangdong,PRC)
出处
《江西科学》
2021年第4期632-640,共9页
Jiangxi Science
基金
国家自然科学基金青年基金项目(41501587)
江西省自然科学基金管理科学项目(20181BAA208016)。
关键词
景观格局
生态系统服务价值
灰色关联度模型
关联性分析
南昌市
landscape pattern
ecosystem service value
grey correlation model
correlation analysis
Nanchang city
