内蒙古生态环境敏感脆弱,且地处华北上游,其生态环境质量对区域影响重大。针对近年来气候变化和经济快速增长带来的日益突出的生态问题,本文基于GEE平台,融合气溶胶光学厚度(AOD)和荒漠化差值指数(DDI),构建改进型遥感生态指数ARSEI,动...内蒙古生态环境敏感脆弱,且地处华北上游,其生态环境质量对区域影响重大。针对近年来气候变化和经济快速增长带来的日益突出的生态问题,本文基于GEE平台,融合气溶胶光学厚度(AOD)和荒漠化差值指数(DDI),构建改进型遥感生态指数ARSEI,动态监测了2000-2023年内蒙古的生态环境质量,并分析了其空间自相关性。利用CA-Markov模型预测未来内蒙古生态环境质量。结果表明:(1)ARSEI指数的PC1贡献度超过87%,能够有效整合生态指标特征,与传统RSEI相比,更能准确反映内蒙古生态环境质量,具有较强的适用性。(2)2000-2023年,内蒙古地区的生态环境质量以较差和中等为主,空间上呈现自东向西递减分布趋势;2000-2005年退化较重,退化面积占比为21.18%,改善面积占比为8.11%,之后逐渐改善。(3)空间自相关分析显示,内蒙古生态环境质量具有显著的空间集聚性(Moran's I > 0.606),以高-高、低-低集聚为主;空间分布上各等级生态环境质量重心整体呈现自东向西、自北向南改善趋势。(4)预测结果显示,未来内蒙古中西部地区生态环境质量恶化风险高于改善潜力,应关注并采取有效措施遏制退化趋势。展开更多
基于长时序Landsat系列卫星遥感影像,计算绿度、湿度、干度及热度指标,构建遥感生态指数(remote sensing based ecological index,RSEI),定量评估了高陵区2013—2024年生态环境质量时空变化。结果表明:高陵区RSEI均值从2013年的0.570增...基于长时序Landsat系列卫星遥感影像,计算绿度、湿度、干度及热度指标,构建遥感生态指数(remote sensing based ecological index,RSEI),定量评估了高陵区2013—2024年生态环境质量时空变化。结果表明:高陵区RSEI均值从2013年的0.570增加至2024年的0.632,增幅10.8%。生态环境质量优良区主要分布于西北和偏东部地区(农田与湿地区域),较差区域集中在西南部工业与建筑用地区域以及东北偏中部的主城区。2013—2024年影响高陵区RSEI的分指标植被指数(normalized difference vegetion dex,NDVI)、湿度指数(wetness component of the tasseled cap trans-formation,WET)和建筑-裸土指数(normalized difference built-up and soil index,NDBSI)均呈减小趋势,地表温度(land surface temperature,LST)呈微弱增大趋势,NDBSI显著下降(下降速率分别为NDVI和WET的4.6倍和1.1倍)是生态质量向好的主要原因。高陵区生态环境质量在降水增加和气温升高的气候因子与人类活动共同驱动下整体呈改善趋势,但局部仍存在退化现象,需进一步加强土地利用规划与农田、湿地资源保护,以协调经济发展与生态平衡。展开更多
In recent years,intensified land use change driven by climate change and human activities have markedly impacted the ecological environmental quality of the arid inland river basins.The implementation of forestry proj...In recent years,intensified land use change driven by climate change and human activities have markedly impacted the ecological environmental quality of the arid inland river basins.The implementation of forestry projects,coupled with continuous population growth,has increased the need for systematic assessments of ecological effects to ensure sustainable development in arid inland river basins.This study generated a 22-a(2000-2021)remote sensing ecological index(RSEI)data series for the Manas River Basin,a typical arid inland river basin in China,utilizing Moderate Resolution Imaging Spectroradiometer(MODIS)data and the Google Earth Engine(GEE)platform.We examined the spatiotemporal patterns of ecological environmental quality in the Manas River Basin through the Theil-Sen estimator,Mann-Kendall trend test,coefficient of variation(CV),and Hurst index.Furthermore,we employed the Optimal Parameter-based Geographical Detector(OPGD)method to quantify the influence of seven key drivers:elevation,slope,temperature,precipitation,gross domestic product(GDP),population density,and land use change.The key findings revealed that the basin's ecological environmental quality showed significant improvement(mean RSEI of 0.38,with a range of 0.34-0.41),with areas exhibiting good and excellent grades increasing by 16.71%,particularly in the midstream oasis region and upstream mountainous region,while areas exhibiting poor and relatively poor grades decreased by 11.52%in the downstream desert region.Spatial heterogeneity of ecological environmental quality was pronounced,with 32.23%of the areas showing localized degradation,the midstream oasis region exhibiting sustainable recovery potential(Hurst index>0.50),and only 36.67%of the areas maintaining stable and highly stable conditions(primarily in the upstream mountainous region).The OPGD analysis revealed that temperature(q-value=0.496-0.780),land use change(q-value=0.705-0.782),and elevation(q-value=0.245-0.637)were dominant factors,with the influence of land use change increasing during 2000-2020.Strong interaction effects emerged between land use change and temperature(q-value>0.705)and between land use change and elevation(q-value=0.751 in 2020),highlighting intensified human-nature coupling.These findings provide vital perspectives for ecosystem management in arid inland river basins under both climate and anthropogenic pressures.展开更多
摘要内蒙古生态环境敏感脆弱,且地处华北上游,其生态环境质量对区域影响重大。针对近年来气候变化和经济快速增长带来的日益突出的生态问题,本文基于GEE平台,融合气溶胶光学厚度(AOD)和荒漠化差值指数(DDI),构建改进型遥感生态指数ARSEI,动态监测了2000-2023年内蒙古的生态环境质量,并分析了其空间自相关性。利用CA-Markov模型预测未来内蒙古生态环境质量。结果表明:(1)ARSEI指数的PC1贡献度超过87%,能够有效整合生态指标特征,与传统RSEI相比,更能准确反映内蒙古生态环境质量,具有较强的适用性。(2)2000-2023年,内蒙古地区的生态环境质量以较差和中等为主,空间上呈现自东向西递减分布趋势;2000-2005年退化较重,退化面积占比为21.18%,改善面积占比为8.11%,之后逐渐改善。(3)空间自相关分析显示,内蒙古生态环境质量具有显著的空间集聚性(Moran's I > 0.606),以高-高、低-低集聚为主;空间分布上各等级生态环境质量重心整体呈现自东向西、自北向南改善趋势。(4)预测结果显示,未来内蒙古中西部地区生态环境质量恶化风险高于改善潜力,应关注并采取有效措施遏制退化趋势。
摘要基于长时序Landsat系列卫星遥感影像,计算绿度、湿度、干度及热度指标,构建遥感生态指数(remote sensing based ecological index,RSEI),定量评估了高陵区2013—2024年生态环境质量时空变化。结果表明:高陵区RSEI均值从2013年的0.570增加至2024年的0.632,增幅10.8%。生态环境质量优良区主要分布于西北和偏东部地区(农田与湿地区域),较差区域集中在西南部工业与建筑用地区域以及东北偏中部的主城区。2013—2024年影响高陵区RSEI的分指标植被指数(normalized difference vegetion dex,NDVI)、湿度指数(wetness component of the tasseled cap trans-formation,WET)和建筑-裸土指数(normalized difference built-up and soil index,NDBSI)均呈减小趋势,地表温度(land surface temperature,LST)呈微弱增大趋势,NDBSI显著下降(下降速率分别为NDVI和WET的4.6倍和1.1倍)是生态质量向好的主要原因。高陵区生态环境质量在降水增加和气温升高的气候因子与人类活动共同驱动下整体呈改善趋势,但局部仍存在退化现象,需进一步加强土地利用规划与农田、湿地资源保护,以协调经济发展与生态平衡。
基金supported by the National Natural Science Foundation of China(32360084).
摘要In recent years,intensified land use change driven by climate change and human activities have markedly impacted the ecological environmental quality of the arid inland river basins.The implementation of forestry projects,coupled with continuous population growth,has increased the need for systematic assessments of ecological effects to ensure sustainable development in arid inland river basins.This study generated a 22-a(2000-2021)remote sensing ecological index(RSEI)data series for the Manas River Basin,a typical arid inland river basin in China,utilizing Moderate Resolution Imaging Spectroradiometer(MODIS)data and the Google Earth Engine(GEE)platform.We examined the spatiotemporal patterns of ecological environmental quality in the Manas River Basin through the Theil-Sen estimator,Mann-Kendall trend test,coefficient of variation(CV),and Hurst index.Furthermore,we employed the Optimal Parameter-based Geographical Detector(OPGD)method to quantify the influence of seven key drivers:elevation,slope,temperature,precipitation,gross domestic product(GDP),population density,and land use change.The key findings revealed that the basin's ecological environmental quality showed significant improvement(mean RSEI of 0.38,with a range of 0.34-0.41),with areas exhibiting good and excellent grades increasing by 16.71%,particularly in the midstream oasis region and upstream mountainous region,while areas exhibiting poor and relatively poor grades decreased by 11.52%in the downstream desert region.Spatial heterogeneity of ecological environmental quality was pronounced,with 32.23%of the areas showing localized degradation,the midstream oasis region exhibiting sustainable recovery potential(Hurst index>0.50),and only 36.67%of the areas maintaining stable and highly stable conditions(primarily in the upstream mountainous region).The OPGD analysis revealed that temperature(q-value=0.496-0.780),land use change(q-value=0.705-0.782),and elevation(q-value=0.245-0.637)were dominant factors,with the influence of land use change increasing during 2000-2020.Strong interaction effects emerged between land use change and temperature(q-value>0.705)and between land use change and elevation(q-value=0.751 in 2020),highlighting intensified human-nature coupling.These findings provide vital perspectives for ecosystem management in arid inland river basins under both climate and anthropogenic pressures.