由耕地、林地、草地、湿地及水域共同构成的绿色空间有利于提升城市生态环境,维护生物多样性和社会经济的可持续发展,理清福建省绿色空间的景观结构组成以及空间配置演变情况对构建生态屏障、打造全国生态示范省具有重要意义。以福建省...由耕地、林地、草地、湿地及水域共同构成的绿色空间有利于提升城市生态环境,维护生物多样性和社会经济的可持续发展,理清福建省绿色空间的景观结构组成以及空间配置演变情况对构建生态屏障、打造全国生态示范省具有重要意义。以福建省绿色空间为对象,分析其景观格局在2000-2020年的演变,并采用地理加权回归(geographically weighted regression,GWR)构建回归模型,分析福建省绿色空间景观格局演变的影响因素及其空间差异性。结果表明:1)2000-2020年,整体绿色空间景观格局的时空变化特征较明显。福建省整体绿色空间破碎化程度上升,总体连通性降低和多样性降低。空间分布上,整体绿色格局破碎化、连通性和多样性变化随着空间位置不同而变化。2)GWR模型在空间位置层面对不同时期的绿色空间格局演变影响因素的解释优于普通最小二乘法(ordinary least squares,OLS)模型。GWR模型结果表明,社会经济影响因素对绿色空间景观格局破碎化、连通性、多样性的影响以负相关为主,且具有较显著的空间差异。自然因素中,地形、温度、降水对绿色空间景观格局的影响也具空间差异。分析揭示了福建省绿色空间景观格局的时空演变特征,并在空间层面上量化影响因素对绿色空间景观格局的影响特征,有助于进一步优化福建省绿色空间格局并构建福建省生态安全格局。展开更多
In recent years,the ecological environment along highways in Tibetan Plateau has been severely affected due to the rapid construction of highways.In order to solve the problems of multiple indicators and inconsistent ...In recent years,the ecological environment along highways in Tibetan Plateau has been severely affected due to the rapid construction of highways.In order to solve the problems of multiple indicators and inconsistent criteria in the ecological impact assessment of highways,and to scientifically screen assessment indicators,the paper proposes a multi-round indicator screening method,which combines literature analysis,expert rating,and statistical analysis.Based on this screening method,normalized difference vegetation index,land surface temperature,elevation,and normalized difference soil index are screened out.Combined with multiple linear regression,an ecological impact assessment model is established and applied to ecological impact assessment of Gonghe-Yushu Expressway.The results show that the expressway construction is the first driving force for the deterioration of the ecological environment along the roadside,and its interference range on the desert grassland ecosystem is greater than that on the agroforestry system.The ecological environment within 150 m on both sides of the expressway should be protected.展开更多
文摘由耕地、林地、草地、湿地及水域共同构成的绿色空间有利于提升城市生态环境,维护生物多样性和社会经济的可持续发展,理清福建省绿色空间的景观结构组成以及空间配置演变情况对构建生态屏障、打造全国生态示范省具有重要意义。以福建省绿色空间为对象,分析其景观格局在2000-2020年的演变,并采用地理加权回归(geographically weighted regression,GWR)构建回归模型,分析福建省绿色空间景观格局演变的影响因素及其空间差异性。结果表明:1)2000-2020年,整体绿色空间景观格局的时空变化特征较明显。福建省整体绿色空间破碎化程度上升,总体连通性降低和多样性降低。空间分布上,整体绿色格局破碎化、连通性和多样性变化随着空间位置不同而变化。2)GWR模型在空间位置层面对不同时期的绿色空间格局演变影响因素的解释优于普通最小二乘法(ordinary least squares,OLS)模型。GWR模型结果表明,社会经济影响因素对绿色空间景观格局破碎化、连通性、多样性的影响以负相关为主,且具有较显著的空间差异。自然因素中,地形、温度、降水对绿色空间景观格局的影响也具空间差异。分析揭示了福建省绿色空间景观格局的时空演变特征,并在空间层面上量化影响因素对绿色空间景观格局的影响特征,有助于进一步优化福建省绿色空间格局并构建福建省生态安全格局。
基金supported by the National Natural Science Foundation of China(NSFC)(No.41801387)。
文摘In recent years,the ecological environment along highways in Tibetan Plateau has been severely affected due to the rapid construction of highways.In order to solve the problems of multiple indicators and inconsistent criteria in the ecological impact assessment of highways,and to scientifically screen assessment indicators,the paper proposes a multi-round indicator screening method,which combines literature analysis,expert rating,and statistical analysis.Based on this screening method,normalized difference vegetation index,land surface temperature,elevation,and normalized difference soil index are screened out.Combined with multiple linear regression,an ecological impact assessment model is established and applied to ecological impact assessment of Gonghe-Yushu Expressway.The results show that the expressway construction is the first driving force for the deterioration of the ecological environment along the roadside,and its interference range on the desert grassland ecosystem is greater than that on the agroforestry system.The ecological environment within 150 m on both sides of the expressway should be protected.
