摘要
普遍为人们所接受的生态系统服务功能经济价值年度总量能够反映一个地区的自然环境情况,但为了更加直观准确地反映环境压力情况,以生态系统服务功能价值理论和方法为基础,提出了人均生态系统服务价值量的概念,并以渭南市为例测算了1996-2004年人均生态系统服务价值量及其变化率,探讨其变化的内在机制,为区域人口、资源、环境的综合研究提出了新的思路。
The acceptable annual economic value of service functions of ecosystems can reflect the natural environment status in a region. In order to exactly reveal the environment pressure in an intuitionistic way, in this paper the concept of per capita service value of ecosystems is put forward based on the theory and methods of the service function value of ecosystems, the per capita service values of ecosystems and their change rates in Weinan City during the period of 1996 -2004 are estimated, and the intrinsic mechanism causing such change is researched so as to provide a new train of thought for the comprehensive study on regional population, resources and environment. The results are as follows ： （ 1 ） The service value of ecological functions was continuously increased during the period of 1996 -2004, it was increased from 6. 177 × 10^5 yuan in 1996 to 6. 345 × 10^5 yuan in 2004; （2） The increase of ecological service value was different from different regions during this period, it was the highest in Hancheng City, but the ecological value in Huayin County was decreased by 1.65% ; （3） The per capita service value of ecosystems in Weinan City was decreased during the period of 1996 -2004 except that in 2003, such situation reveals that the ecological pressure in the study area is increased year by year, and the environment is gradually degenerated due to population growth.
出处
《干旱区研究》
CSCD
北大核心
2008年第5期729-734,共6页
Arid Zone Research
基金
陕西理工学院校内基金项目(SLGQD0619)
