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Ecosystem services refers to the ecosystems and ecological processes of the formation and the maintenance of the natural environment for human survival and utility conditions. Forests as the main terrestrial ecosystems, their ecosystem services research has been a hot topic in today's ecology one. Previous studies primarily in global or regional scale on the paper on the basis of previous studies, Lin'an City, Zhejiang Province, Taihu watershed forest ecosystem services evaluation studies carried out in order to provide reference for the overall planning of small watershed. In this paper, frequency analysis and theoretical analysis, combined Lin'an source of Taihu Lake area features built of local forest resources for Lin'an small watershed area of ??forest ecosystem services evaluation index system, an indicator 5: carbon fixation and oxygen, conserving water, soil conservation, air purification, biodiversity conservation, two indicators 8: Fixed carbon dioxide and release oxygen, water regulation, water purification, reduce the loss of soil fertility, reduce sedimentation, absorption of sulfur dioxide, dust, block, and The formation mechanism of each evaluation indicators and evaluation methods are described in detail and description. September-October 2010, the study area of ??six major forest: pine, hickory forest, broadleaf forest, conifer, fir, bamboo conducted a survey on the basis of the unit area of ??ecosystem services of substance were estimated to determine the value of units of substance, seeking calculated per unit area of ??each index stands magnitude of value, according to statistics obtained for each forest area, and finally calculate the entire watershed of seeking forest ecosystem services worth. Assessment results are as follows: in the study area of ??forest ecosystem services each year the total value of 36,339,300 yuan, of which the value of 12,549,400 yuan soil conservation, the total value of 34.53%; carbon fixation and oxygen value of 12.0586 million yuan, the total value of 33.18%; biological Diversity worth 5.776 million yuan, accounting for 15.89% of the value; water conservation value of 5,320,700 yuan, the total value of 14.64%; clean air worth 634,600 yuan, accounting for 1.75% of the value. Unit area of ??forest ecosystem service value descending order of bamboo (30,680 yuan / hm ~ 2) gt; softwood forest (24,800 yuan / hm ~ 2) gt; pine (23,300 yuan / hm ~ 2 ) gt; hardwood forest (23,100 yuan / hm ~ 2) gt; fir (21,700 yuan / hm ~ 2) gt; hickory forest (20,100 yuan / hm ~ 2).
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