One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of...One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of households at different income levels13 years after its implementation. Using survey data from 2012 on rural households＇ livelihoods in the upper reaches of the Minjiang River in Sichuan Province and using the non-participating households as a reference,the current impact of the SLCP on household income is calculated with a multiple linear regression model and a quantile regression model. The socio-geographic features of participating and non-participating households are also be compared. The results show no significant differences between the SLCP participating and non-participating households in many socio-demographic characteristics. Participating in the SLCP had no significant impact on household income at all income levels in the study area in 2012. This finding suggests that the SLCP is not currently increasing household income significantly in the study area,and that the implementation plan of the SLCP should be changed in this area in order to achieve its poverty reduction goal.展开更多
文章以1999?2019年CNKI总库与Web of Science核心合集数据库中以退耕还林为主题的期刊论文为数据源,借助CiteSpace V知识图谱工具,对退耕还林研究的被引文献、主题演进和研究前沿等知识基础开展可视化分析。研究发现:(1)中文发文数量呈...文章以1999?2019年CNKI总库与Web of Science核心合集数据库中以退耕还林为主题的期刊论文为数据源,借助CiteSpace V知识图谱工具,对退耕还林研究的被引文献、主题演进和研究前沿等知识基础开展可视化分析。研究发现:(1)中文发文数量呈先增加后下降的走势,而外文文献数量随时间演变稳定增长;(2)中文CSSCI文献有关退耕还林的研究主要围绕基础理论探索与社会经济影响的实证检验两个重要的聚类主题,外文文献围绕退耕还林的生态影响及其效益评估、土地利用变化及其对生态系统服务的影响、成本有效性与预期目标等社会经济与生态环境问题11个聚类主题展开深入探讨;(3)退耕还林研究知识基础整体表现为由早期以社会经济影响研究为主向社会经济与生态效益研究并存转化,再向以生态效益的细分领域研究为主的转化演进过程,知识结构虽有重叠,但社会经济与生态等多学科交叉特性不明显。因此,研究视角的多学科交叉融合和如何在不同区域进一步巩固扩大退耕还林的成果,以科学合理利用国土资源、增加林草植被、维护生态安全是今后研究的重点。同时,如何通过市场的力量合理配置退耕还林资金的投入结构、提升资金的使用效率,也将是后续研究值得思考的现实问题。展开更多
Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss...Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.展开更多
基金National Natural Science Foundation of China(41201603)
文摘One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of households at different income levels13 years after its implementation. Using survey data from 2012 on rural households＇ livelihoods in the upper reaches of the Minjiang River in Sichuan Province and using the non-participating households as a reference,the current impact of the SLCP on household income is calculated with a multiple linear regression model and a quantile regression model. The socio-geographic features of participating and non-participating households are also be compared. The results show no significant differences between the SLCP participating and non-participating households in many socio-demographic characteristics. Participating in the SLCP had no significant impact on household income at all income levels in the study area in 2012. This finding suggests that the SLCP is not currently increasing household income significantly in the study area,and that the implementation plan of the SLCP should be changed in this area in order to achieve its poverty reduction goal.
文摘文章以1999?2019年CNKI总库与Web of Science核心合集数据库中以退耕还林为主题的期刊论文为数据源,借助CiteSpace V知识图谱工具,对退耕还林研究的被引文献、主题演进和研究前沿等知识基础开展可视化分析。研究发现:(1)中文发文数量呈先增加后下降的走势,而外文文献数量随时间演变稳定增长;(2)中文CSSCI文献有关退耕还林的研究主要围绕基础理论探索与社会经济影响的实证检验两个重要的聚类主题,外文文献围绕退耕还林的生态影响及其效益评估、土地利用变化及其对生态系统服务的影响、成本有效性与预期目标等社会经济与生态环境问题11个聚类主题展开深入探讨;(3)退耕还林研究知识基础整体表现为由早期以社会经济影响研究为主向社会经济与生态效益研究并存转化,再向以生态效益的细分领域研究为主的转化演进过程,知识结构虽有重叠,但社会经济与生态等多学科交叉特性不明显。因此,研究视角的多学科交叉融合和如何在不同区域进一步巩固扩大退耕还林的成果,以科学合理利用国土资源、增加林草植被、维护生态安全是今后研究的重点。同时,如何通过市场的力量合理配置退耕还林资金的投入结构、提升资金的使用效率,也将是后续研究值得思考的现实问题。
基金Under the auspices of National Key Technology Research and Development Program of China(No.2011BAC09B08)Special Issue of National Remote Sensing Survey and Assessment of Eco-Environment Change between 2000 and 2010(No.STSN-04-01)
文摘Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.
