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Research on Forest Ecosystem Service and Ecological Value in Shaoyang City

Author: MaWenYin
Tutor: KangWenXing
School: Central South University of Forestry Science and Technology
Course: Ecology
Keywords: Forest ecosystems Ecosystem services Magnitude of value evaluation Shaoyang City
CLC: S718.5
Type: Master's thesis
Year: 2007
Downloads: 54
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Abstract


Forest as terrestrial ecosystems body, in the global ecosystem plays a pivotal role in the assessment of the value of their services is a hot research topic. Ecological service function of forest ecosystems forest ecosystems and their ecological processes of the human natural environment conditions and utility. It is the people's living and economic construction to provide a variety of direct and indirect ecosystem services. With the economic globalization, the rapid population increase and the human irrational development and utilization of land, the forest as vegetation types of terrestrial ecosystems are increasingly destroyed, reduced biodiversity, ecosystem services is a serious decline. Forest ecosystems of the thesis Shaoyang City as the research object, production forest ecosystems timber, water conservation, carbon fixation and oxygen, nutrient return, the connotation of the soil and water conservation, and clean up the air six ecosystem services, and identified as the main service function assessment object, constructed Shaoyang City forest ecosystem services evaluation index system (A 2, B grade 6, C grade 14) to evaluate from the magnitude of value of their service functions. The study results show that: the total value of forest ecosystem services in Shaoyang City 52.96 × 108 yuan / a, equivalent Shaoyang City in 2005 to 16.08% of GDP. Constituted in accordance with the value of comparison, the direct value and indirect value of forest ecosystem services in Shaoyang City were 8.55 × 108 yuan / a and 44.41 × 108 yuan / a, the indirect service function value is a direct service function value of 5.19 times; show that the forest ecosystem in addition to provide the community with a direct product of great ecological value and ecological value of the human contribution is more significant than the value of the trees. Shaoyang City, the contribution of the service value, the value of timber production function is 8.55 × 108 yuan / a water conservation function value of 5.44 × 108 yuan / a, soil and water conservation function value of 7.65 × 108 yuan / a nutrient return function value of 2.48 × 108 yuan / a, air purification function value of 6.43 × 108 yuan / a, carbon fixation and oxygen functional value of 22.41 × 108 yuan / a, in order of size as follows: carbon sequestration and oxygen release gt; timber production gt ; Soil and Water Conservation gt; air purification gt; to water conservation gt; nutrient return the highest value of ecosystem carbon fixation and oxygen, the total value of 42.32%; nutrient return the lowest value. Forest ecosystems in Shaoyang City, the service function value of the unit of forest area for 4204 yuan / hm2.a, per capita forest service value of 712 yuan / a. Taking into account the ecosystem services so far to understand the limitations as well as the calculation method and parameters defects, lack of field monitoring data, the estimates derived value should be low on the actual value, pending further study in the future.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest Biology > Forest Ecology
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