鼎湖山南亚热带森林生态系统服务价值动态

以鼎湖山3个南亚热带森林演替典型阶段生态系统为对象,采用我国《森林生态系统服务功能评估规范》（LY/T 1721—2008）标准化计算公式与服务价格,量化揭示南亚热带森林生态系统演替过程中生态系统服务功能价值动态。结果表明：随着演替的进行,南亚热带森林生态系统服务功能总价值不断增大;但各分项服务功能价值则表现出不同的动态规律与变化幅度,从而使得森林生态系统服务结构呈现非线性演化特征。在南亚热带森林生态系统演替的早期阶段,生态系统服务价值的最大组分是涵养水源的功能价值,而中、后期则是保育土壤。人工林营造可以有效增强区域生态系统的水源涵养能力,而保育演替中、后期森林则对于大气CO2收和土壤保育而言尤为重要。

Dynamics in ecosystem service values of lower subtropical forest in Dinghushan

Taking three succession stages of lower subtropical forest in Dinghushan as objects,the dynamics of the subtropical forest ecosystem service values were revealed by calculating a suite of specific indices,using formulae and prices of the Specification for Assessment of Forest Ecosystem Services in China（LY 1721—2008）.The results showed that the total ecosystem service values of lower subtropical forest kept increasing following succession processes which is from coniferous forest to mixed coniferous and broadleaved forest,and then to monsoon evergreen broadleaved forest.However,different trends and degrees were shown up on different services,which resulted in the non-linear changes of ecosystem service structures in subtropical forest.In the pioneering stage of succession,the largest proportion of subtropical forest ecosystem service value was water conservation,which was replaced by soil conservation in the middle and late succession stages.Reforestation can efficiently improve regional water conservation in subtropical area,while protecting forests in middle and late succession stages is especially important for absorbing CO2 and soil conservation.