Land-use change is intertwined with tourism because land is used as a resource for human activities.Land-use change also provides an opportunity to evaluate the status of the ecoenvironment.Understanding the relations...Land-use change is intertwined with tourism because land is used as a resource for human activities.Land-use change also provides an opportunity to evaluate the status of the ecoenvironment.Understanding the relationship between tourism and land use change would help to predict the effect of tourism on land use and encourage sustainable tourism development.Using the Li River Basin as a case study,a hybrid approach using multilevel modeling and logistic regressions was employed to analyze the distribution of land-usechange between 1989 and 2010 to examine potential driving factors.Results reveal that rapid tourism development and construction expansion expose this area to risk of deforestation and forest degradation.Construction increased by 141% between 1989 and 2000 and by 195% between 2000 and 2010.The primary driving force for construction expansion shifted from population growth between 1989 and 2000 to investment growth after 2000.New construction primarily occurred on crop and woodlands areas,with shares of 81.25% and 6.38%,respectively,between 1989 and 2000,and with shares of 57.79% and 15.29%,respectively,between 2000 and 2010.Moreover,these drastic increases in construction also led to frequent transitions between croplands,woodlands,and grasslands.Traits including distances to urban areas and roads and scenic locations exerted significant effects on land-use change.Woodland regrowth in the areas thatsurround scenic locations consisted of fluctuating woodlands,whereas stable woodland regrowth was often absent in these areas.Likewise,permanent woodland clearing tended to be closed to near scenic locations.That is,construction at scenic locations negatively affected forest conservation in the Li River Basin.展开更多
2012-05-08—17期间,漓江先后出现3次洪水,在洪水期间对漓江进行了高频率昼夜监测。发现洪水过程中不同阶段岩溶碳汇具有不同的变化特征,研究表明:Ⅰ和Ⅴ阶段的河流水化学由于基本未受洪水影响,pH、水温和PCO2具有明显的昼夜变化特征,E...2012-05-08—17期间,漓江先后出现3次洪水,在洪水期间对漓江进行了高频率昼夜监测。发现洪水过程中不同阶段岩溶碳汇具有不同的变化特征,研究表明:Ⅰ和Ⅴ阶段的河流水化学由于基本未受洪水影响,pH、水温和PCO2具有明显的昼夜变化特征,EC、流量和HCO3-则相对较稳定;Ⅱ、Ⅲ和Ⅳ阶段由于洪水的影响出现了不同的变化特征,其中Ⅳ阶段由于雨后碳酸盐岩的溶解,降雨主要分布于岩溶区及降雨量较小等因素导致Ⅳ阶段流量与HCO3-为正相关,与Ⅱ、Ⅲ阶段相反。利用水化学-径流法计算洪水过程中的碳汇量,碳汇与流量和HCO3-的相关系数分别是0.87和0.33。本次洪水监测期间的碳汇通量为3 491.06 t C,其中洪水过程中的碳汇量是洪水前的4.52倍。展开更多
基金sponsored by the National Key Technology R&D Program of China (Grant No. 2012BAC16B00)the Natural Science Foundation of China (Grant No. 41371097)
文摘Land-use change is intertwined with tourism because land is used as a resource for human activities.Land-use change also provides an opportunity to evaluate the status of the ecoenvironment.Understanding the relationship between tourism and land use change would help to predict the effect of tourism on land use and encourage sustainable tourism development.Using the Li River Basin as a case study,a hybrid approach using multilevel modeling and logistic regressions was employed to analyze the distribution of land-usechange between 1989 and 2010 to examine potential driving factors.Results reveal that rapid tourism development and construction expansion expose this area to risk of deforestation and forest degradation.Construction increased by 141% between 1989 and 2000 and by 195% between 2000 and 2010.The primary driving force for construction expansion shifted from population growth between 1989 and 2000 to investment growth after 2000.New construction primarily occurred on crop and woodlands areas,with shares of 81.25% and 6.38%,respectively,between 1989 and 2000,and with shares of 57.79% and 15.29%,respectively,between 2000 and 2010.Moreover,these drastic increases in construction also led to frequent transitions between croplands,woodlands,and grasslands.Traits including distances to urban areas and roads and scenic locations exerted significant effects on land-use change.Woodland regrowth in the areas thatsurround scenic locations consisted of fluctuating woodlands,whereas stable woodland regrowth was often absent in these areas.Likewise,permanent woodland clearing tended to be closed to near scenic locations.That is,construction at scenic locations negatively affected forest conservation in the Li River Basin.
文摘2012-05-08—17期间,漓江先后出现3次洪水,在洪水期间对漓江进行了高频率昼夜监测。发现洪水过程中不同阶段岩溶碳汇具有不同的变化特征,研究表明:Ⅰ和Ⅴ阶段的河流水化学由于基本未受洪水影响,pH、水温和PCO2具有明显的昼夜变化特征,EC、流量和HCO3-则相对较稳定;Ⅱ、Ⅲ和Ⅳ阶段由于洪水的影响出现了不同的变化特征,其中Ⅳ阶段由于雨后碳酸盐岩的溶解,降雨主要分布于岩溶区及降雨量较小等因素导致Ⅳ阶段流量与HCO3-为正相关,与Ⅱ、Ⅲ阶段相反。利用水化学-径流法计算洪水过程中的碳汇量,碳汇与流量和HCO3-的相关系数分别是0.87和0.33。本次洪水监测期间的碳汇通量为3 491.06 t C,其中洪水过程中的碳汇量是洪水前的4.52倍。
