| Popis: |
Rangelands of the Qinghai-Tibetan Plateau is an important base for livestock production and shelter for the ecological safety in China.The degradation of alpine rangeland in the Qinghai-Tibetan Plateau has not only impacted local livestock production and people′s quality of life,but also seriously damaged the ecosystem security of China and Southeast Asia.By analyzing the function of ecology,production and livelihood(FEPL) of alpine rangeland ecosystem,this study examines inter-relationship between population and grazing pressure and environmental carrying capacity of alpine rangeland ecosystem,as well as the structural change of FEPL and its effect on service function of alpine rangeland ecosystem,and illustrates the alpine rangeland ecosystem′s FEPL and its internal relation of polybasic coupling,multidimensional linkage and multiple feedbacks.Using the Naqu region of northern in the Qinghai-Tibetan Plateau as an example,this study utilizes the annual per-capita income of well-to-do society and overcome-poverty line for the herdsman proclaimed by Chinese government in 2008 as standard livelihood function and establishes an appropriate structure for the FEPL of alpine rangeland ecosystem based on the equivalent of the ecological services function under the different economic conditions that can maintain sustainable development of alpine rangeland ecosystem.The results show that the degradation of alpine rangeland has caused a 60% decrease of the population carrying capacity in the region.For example,the current population carrying capacity in the Naqu region in 2008 accounted for 36% and 118.9% of estimated population carrying capacity in the overcome-poverty life line and well-to-do society,respectively.Therefore,controlling population carrying capacity is the key for mutual development of the FEPL of alpine rangeland ecosystem in the Qinghai-Tibetan Plateau. |
