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河湟谷地生态系统服务价值时空演变研究

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土地利用类型是影响生态系统服务价值(ESV)的关键因素,分析土地利用变化对ESV的响应程度,可以为生态脆弱区的生态环境保护与可持续发展提供科学依据.以河湟谷地为例,基于2000-2015年土地利用数据,采用混合元胞自动机(MCCA)模型和改进的当量因子法,分析2000-2035年土地利用变化和ESV的时空变化特征.结果表明:(1)2000-2035年期间土地利用类型以耕地、草地和林地为主,耕地和草地面积总体呈下降趋势,建设用地面积总体呈上升趋势.(2)2000-2015年,河湟谷地的ESV在时间上呈先上升后下降再上升的演变趋势,在空间上呈异质性分布格局,中高值区主要聚集在草地和林地地区,低值区主要聚集在城市中心及其周边地区.(3)预测2035年河湟谷地自然趋势和生态保护两种情景的ESV较2015年均呈上升趋势,而经济发展情景的ESV则稍有下降.研究结果可为河湟谷地及类似区域的生态环境保护与可持续发展提供科学参考.
Temporal and spatial evolution of ecosystem service value in Hehuang Valley
Land use type is a key factor affecting ecosystem service value(ESV).Analyzing the re-sponse degree of land use change to ESV can provide scientific basis for ecological environment pro-tection and sustainable development in the ecologically fragile areas.Based on the land use data from 2000 to 2015 in Hehuang Valley,the spatio-temporal changes of land use change and ESV are ana-lyzed from 2000 to 2035 using mixed-cell cellular automata(MCCA)model and improved equiva-lent factor method.The results are as follows:(1)From 2000 to 2035,the main types of land use are arable land,grassland and forest land,with an overall decreasing trend in arable land and grassland area,and an increasing trend in construction land area.(2)From 2000 to 2015,the ESV in Hehuang Valley shows an evolutionary trend of first increasing,then decreasing,and then increasing again in time,which exhibits a heterogeneous distribution pattern in space.The medium to high value areas are mainly concentrated in grassland and forest areas,while low value areas are mainly concentrated in the city center and its surrounding areas.(3)The ESV of natural trend and ecological protection scenarios in Hehuang Valley in 2035 shows an upward trend compared to 2015,while the economic development scenario slight decreases.The results can provide scientific reference for ecological en-vironment protection and sustainable development in Hehuang Valley and similar areas.

ecosystem service value(ESV)mixed-cell cellular automata(MCCA)modelscenario simulationHehuang Valley

王泽佳、雷浩川、汪奕舟、盛海彦、刘丹、唐嫚

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青海大学地质工程学院,青海西宁 810016

青海大学农牧学院,青海西宁 810016

生态系统服务价值 混合元胞自动机模型 情景模拟 河湟谷地

2024

青海大学学报(自然科学版)
青海大学

青海大学学报(自然科学版)

影响因子:0.355
ISSN:1006-8996
年,卷(期):2024.42(6)