The purpose of this article is to establish an evaluation system, which is to estimate the value of forest ecosystem services in nature reserve.

本研究的目的在于构建一个森林类型自然保护区生态系统服务的价值评估体系。

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Based on the curve of recreation demand, recreation value of forest landscape is 101.6072 million yuan in this area in the year of 2002.

在此基础上制定了游憩需求曲线，计算得出研究区2002年森林景观游憩经济价值为1.02亿元。

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The value of forest resources in mountainous area of Beijing is affiliated and dynamic.

北京山区森林资源的价值具有附属和动态变化特性。

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One answer is to introduce a simple, global and transparent mechanism that recognises the value of the services that each hectare of forest provides to humanity.

ECONOMIST: Letters

According to our estimates, Norfolk stock derives nearly 20% of its value from its construction freight and forest products divisions.

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At the moment, standing forest is of little commercial value, and much of it continues to exist only because of laws intended to prevent total clearance of the land.

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