...森林生态系统服务；北京；协调系数；价值评估 [gap=1364]keywords: forest economics and management; forest ecosystem services; beijing municipality; coordinate coefficient; evaluation of value ..
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森林植被碳密度是衡量森林生态系统服务功能和产品供给功能高低的一个重要指标。
Forest carbon density is an important indicator reflecting the level of forest ecosystem function in ecological service and product supply.
客观评价森林生态系统服务功能价值动态变化，对于科学经营与管理森林资源具有重要的现实意义。
It has important significance for scientifically managing and running forest resources to evaluate the dynamic changes of the service function of forestry ecosystem system.
但是他的这一信息却是很重要，森林和其他的生态系统提供了有价值的服务，如果要保护它们，人们必须的有所付出。
Yet his message is an important one. Forests and other eco-systems provide valuable services; and if they are to be conserved, people must pay for them.
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