Urbanization has significant impacts on ecosystem health(ESH)by affecting land-use patterns.The evaluation of the ESH and the spatial correlations between human interference provides an insight into sustainable develo...Urbanization has significant impacts on ecosystem health(ESH)by affecting land-use patterns.The evaluation of the ESH and the spatial correlations between human interference provides an insight into sustainable development as a response to potential ecological degradation if ESH is threatened by further urbanization.We applied the Vigor-Organization-Resilience-Services(VORS)modelto detect the responses of ESH of Shannan Prefecture in the Tibet to urbanization from 1990 to 2015,based on different levels of terrain gradients.The results show that the ESH of the most areas in Shannan reaches the levels of highest health and average health during the study period.By 2015,the area proportion at the highest health level increased by 0.68%,while that of degraded level decreased by 1.51%.Overall,the ESH of areas tends to shrink at higher-level TGs,and urban sprawl with ESH shrinking existed in middle-level TGs in Shannan.Furthermore,a significant spatial aggregation effect was found concerning that low ESH-high CUL type is mainly distributed on the middle-level TGs with dense human population.The results highlight the needs to rationally organize urbanization process in plateau regions based on different TGs,which contribute to maintain ESH advancing people livelihood improvement.展开更多
The Da-Xiao Liangshan mountains are critical ecological function areas and essential ecological barriers in the upper reaches of the Yangtze River in China.This study selected a total of six periods of land use land c...The Da-Xiao Liangshan mountains are critical ecological function areas and essential ecological barriers in the upper reaches of the Yangtze River in China.This study selected a total of six periods of land use land cover(LULC)data from 1995 to 2020,to estimate the ecosystem service value(ESV)and analyzed its spatiotemporal evolution and topographic gradient divergence.The results showed that:(1)The ESV increased by 1.1 billion yuan,with an increase rate of 1.47%from 1995 to 2020.Two time periods,2005–2010 and 2015–2020,showed more significant increases than other periods.(2)The elevation and slope of mountainous areas determine the type of land use and further influence the spatial pattern of ESV.(3)Although woodland and grassland are the main land use types of the study area(more than 90%),the hydrological regulation function of the water area partially compensated for the impact of the encroachment of the built-up area on the ESV of grassland.(4)The spatial distribution of ESVs showed an inverted V-shaped characteristic as the topographic gradient increased,with the dominant position being the 5th topographic gradient zone.Finally,this study provided relevant recommendations for ecosystem protection and optimization.The findings of this study clarified the influence of topographical factors on the spatial differentiation of ESV and provided novel insights into ecosystem protection.展开更多
基金This work was supported by Second Tibetan Plateau Scientific Expedition and Research(No.2019QZKK0308)National Natural Science Foundation of China(No.42101290).
文摘Urbanization has significant impacts on ecosystem health(ESH)by affecting land-use patterns.The evaluation of the ESH and the spatial correlations between human interference provides an insight into sustainable development as a response to potential ecological degradation if ESH is threatened by further urbanization.We applied the Vigor-Organization-Resilience-Services(VORS)modelto detect the responses of ESH of Shannan Prefecture in the Tibet to urbanization from 1990 to 2015,based on different levels of terrain gradients.The results show that the ESH of the most areas in Shannan reaches the levels of highest health and average health during the study period.By 2015,the area proportion at the highest health level increased by 0.68%,while that of degraded level decreased by 1.51%.Overall,the ESH of areas tends to shrink at higher-level TGs,and urban sprawl with ESH shrinking existed in middle-level TGs in Shannan.Furthermore,a significant spatial aggregation effect was found concerning that low ESH-high CUL type is mainly distributed on the middle-level TGs with dense human population.The results highlight the needs to rationally organize urbanization process in plateau regions based on different TGs,which contribute to maintain ESH advancing people livelihood improvement.
基金supported by the National Natural Science Foundation of China(Grant No.52078423)the Sichuan Province Science and Technology Support Program(Grant No.2020YFS0309 and 2020YFS0054)+1 种基金the China Engineering Science and Technology Strategic Consulting Project(Grant No.2022JDR0356)the Key Research Institution of Philosophy and Social Sciences in Sichuan Province:Research Center of National Parks(Grant No.GJGY2023-YB001)。
文摘The Da-Xiao Liangshan mountains are critical ecological function areas and essential ecological barriers in the upper reaches of the Yangtze River in China.This study selected a total of six periods of land use land cover(LULC)data from 1995 to 2020,to estimate the ecosystem service value(ESV)and analyzed its spatiotemporal evolution and topographic gradient divergence.The results showed that:(1)The ESV increased by 1.1 billion yuan,with an increase rate of 1.47%from 1995 to 2020.Two time periods,2005–2010 and 2015–2020,showed more significant increases than other periods.(2)The elevation and slope of mountainous areas determine the type of land use and further influence the spatial pattern of ESV.(3)Although woodland and grassland are the main land use types of the study area(more than 90%),the hydrological regulation function of the water area partially compensated for the impact of the encroachment of the built-up area on the ESV of grassland.(4)The spatial distribution of ESVs showed an inverted V-shaped characteristic as the topographic gradient increased,with the dominant position being the 5th topographic gradient zone.Finally,this study provided relevant recommendations for ecosystem protection and optimization.The findings of this study clarified the influence of topographical factors on the spatial differentiation of ESV and provided novel insights into ecosystem protection.
基金jointly supported by the National Basic Research Program of China[973 Program,grant number 2015CB954102]National Natural Science Foundation of China[grant numbers41305095 and 41175064]
基金supported by the National Basic Research Program of China(973 Program)[grant number 2015CB954102]the National Natural Science Foundation of China[grant number41305095],[grant number 41175064]