The Bashang region is a typical vulnerable eco-environmental zone. Our analysis of paleodunes, paleosol profiles, and lake changes taking place during last ten thousands years indicated that: (1) 10 - 6.9 ka B. P. was...The Bashang region is a typical vulnerable eco-environmental zone. Our analysis of paleodunes, paleosol profiles, and lake changes taking place during last ten thousands years indicated that: (1) 10 - 6.9 ka B. P. was a post-glacial temperature-increasing stage, in which lakes had their high water level; (2) 6.9 - 3.0 ka B. P. was a large warm stage, during which four paleosol layers were developed and climate fluctuation has assumed 4 - 5 small cold-humid and cold-dry alternations. Since 5.4 ka B. P, the lakes tended to gradually shrink; and by 2.1 ka B. P., water level has fallen by 2.7 m; (3) since 3.0 ka B. P. a general trend of the region was to change into a dry, warm-dry and cold-dry environment.展开更多
The ecological footprint and ecological carrying capacity in Bashang region of Zhangjiakou city were calculated with the statistical data of the region in 1999. Based on calculation, the balance between ecological foo...The ecological footprint and ecological carrying capacity in Bashang region of Zhangjiakou city were calculated with the statistical data of the region in 1999. Based on calculation, the balance between ecological footprint and ecological carrying capacity was analyzed, and the threshold values of the ecological carrying capacity and population capacity of the region at the current production level were determined. Strategies on reducing ecological deficit in this region were also brought forward.展开更多
基金The National Natural Science Foundation of China(No.49872094andNo.40072097)
文摘The Bashang region is a typical vulnerable eco-environmental zone. Our analysis of paleodunes, paleosol profiles, and lake changes taking place during last ten thousands years indicated that: (1) 10 - 6.9 ka B. P. was a post-glacial temperature-increasing stage, in which lakes had their high water level; (2) 6.9 - 3.0 ka B. P. was a large warm stage, during which four paleosol layers were developed and climate fluctuation has assumed 4 - 5 small cold-humid and cold-dry alternations. Since 5.4 ka B. P, the lakes tended to gradually shrink; and by 2.1 ka B. P., water level has fallen by 2.7 m; (3) since 3.0 ka B. P. a general trend of the region was to change into a dry, warm-dry and cold-dry environment.
文摘The ecological footprint and ecological carrying capacity in Bashang region of Zhangjiakou city were calculated with the statistical data of the region in 1999. Based on calculation, the balance between ecological footprint and ecological carrying capacity was analyzed, and the threshold values of the ecological carrying capacity and population capacity of the region at the current production level were determined. Strategies on reducing ecological deficit in this region were also brought forward.
