首页|土地利用变化对黔中地区"两湖流域"生态系统服务价值时空演变的影响

土地利用变化对黔中地区"两湖流域"生态系统服务价值时空演变的影响

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  • NETL
  • NSTL
  • 万方数据
"两湖流域"作为典型的喀斯特高原湖泊,同时也是黔中地区主要的水源地之一,如何科学评估其生态系统服务价值并掌握其生态环境动态变化趋势,对于整个黔中城市群的绿色高质量发展有着重要的实际意义.基于 1980、2000 及 2020 年土地遥感解译数据,以价值当量因子法为基础研究方法,同时结合空间相关性分析、热点分析、地形分析及生态敏感性分析等对该流域 1980-2020 年近 40 年间的生态系统服务价值时空演变特征进行识别.结果表明:1)ESV总量呈现逐步下降的趋势,在1980-2000 年阶段减少约 585.84×104 元,2000-2020 年阶段减少约 8 838.60×104 元,减少的原因主要为建设用地的大量扩张、高生态效益地类大批转换为低生态效益的地类等;2)水文调节为ESV贡献值最大的生态系统服务类型,ESV高值区集中分布于流域的中上部湖泊处,中值区分布于东南部林地集中处,低值区主要分布于流域南部耕地较多的地方;3)各用地类型CS敏感性指数计算值均小于1,且ESV变化量的冷热点空间分布格局与其土地利用类型转移方式具有相似性,冷点区出现的主要原因为城市的持续性扩张、林草地等生态用地被占用等,而热点区的涌现则是由于"退耕还林""封山育林"等政策的实施;4)在 4 种地貌类型中,单位区域面积的 ESV 大小从高到低排列依次为山脊(1.48×104 元/hm2)>峡谷底(1.44×104元/hm2)>平坦区(1.40×104 元/hm2)>陡坡(1.37×104 元/hm2),而地表粗糙度ESV等级排序为Ⅰ>Ⅱ>Ⅲ>Ⅳ.本研究结果可为黔中地区未来生态效益价值核算、城市规划与绿色发展提供理论支持.
The impact of LUCC on the spatiotemporal evolution of ecosystem service value in the"Two Lake Basin"in the central Guizhou region
As a typical Karst Plateau lake,the"Two Lake Basin"is also one of the most important water sources in central Guizhou.How to scientifically assess its ecosystem service value and grasp the dynamic change trend of its ecological environment has important practical significance for the green and high-quality development of the entire central Guizhou urban agglomeration.Based on land remote sensing interpretation data from 1980,2000,and 2020,using the value equivalent factor method as the basic research method,and combining spatial correlation analysis,hot spot analysis,terrain analysis,and ecological sensitivity analysis,the spatiotemporal evolution characteristics of ecosystem service value in the watershed over the past 40 years from 1980 to 2020 were identified.The results showed that:1)The total amount of ESV showed a gradually decreasing trend,with a decrease of approximately 585.84×104 yuan in the period from 1980 to 2000,with a decrease of approximately 8 838.60×104 yuan from 2000 to 2020,mainly due to the significant expansion of construction land and the conversion of high ecological efficiency land types to low ecological efficiency land types;2)Hydrological regulation is the ecosystem service type with the largest contribution value of ESV.The high value area of ESV is distributed in the middle and upper lakes of the basin,the median value area is distributed in the southeast where the forest land is concentrated,and the low value area is mainly distributed in the southern part of the basin where there is more cultivated land;3)The calculated value of CS sensitivity index of each land use type is less than 1,and the spatial distribution pattern of cold and hot spots of ESV changes is similar to the transfer mode of land use types.The main reasons for the emergence of cold spots are the continuous expansion of cities,the occupation of ecological land such as forests and grasslands,etc.,while the emergence of hot spots is due to the implementation of policies such as"Grain for Green"and"closing mountains for afforestation";4)Among the four types of landforms,the ESV size per unit area is ranked from high to low in the order of ridges(1.48×104 yuan/hm2)>canyon bottom(1.44×104 yuan/hm2)>flat area(1.40×104 yuan/hm2)>steep slope(1.37×104 yuan/hm2),and the ESV level of surface roughness is ranked asⅠ>Ⅱ>Ⅲ>Ⅳ.The research results can provide theoretical support for the creation of future ecological benefits,urban planning,and green development in the central Guizhou region.

Central Guizhou regionvalue of ecosystem servicesland use and land cover changeequivalent factor methodtemporal and spatial distribution characteristics

罗军华、何秋叶、赵祖伦、李威、黄亮、吕思思、赵卫权

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贵州省山地资源研究所,贵州 贵阳 550001

贵阳市城乡规划设计研究院,贵州 贵阳 550001

黔中地区 生态系统服务价值 土地利用变化 当量因子法 时空分布特征

贵州省基础研究计划贵州省基础研究计划贵州省科技支撑计划贵州省科技支撑计划贵州省科技支撑计划贵州科学院青年基金贵州科学院创新团队支撑项目

黔科合基础[2020]1Y410黔科合基础ZK[2022]277黔科合支撑[2020]4Y132黔科合支撑[2023]一般199黔科合支撑[2023]一般198黔科院J字[2024]13号

2024

环境生态学

环境生态学

CSTPCD
ISSN：
年,卷(期)：2024.6(3)
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