Research On Spatiotemporal Dynamic Assessment Of Forest Ecosystem Service Value In Zhejiang Province

Forest vegetation is the original cradle of the miracle of human civilization.It is an important natural ecological factor that directly affects the survival and continuation of human beings today.It has an irreplaceable position.With the development of human economy and society and the continuous deterioration of habitat,people's demand for ecological improvement is more and more intense,and the forest ecosystem service function and its benefits have gradually become the focus of social attention.Therefore,this study selected the current our country social economy is relatively developed eastern and overall high forest coverage rate in zhejiang province as the research object,based on the 2020 national release of the forest ecosystem service function evaluation specification(LY/T1721)as the basis,combined with actual situation in zhejiang province building forest ecosystem service function evaluation index system.Using distributed algorithm evaluation,11 ? 2000 and 2020 the provincial government of zhejiang province has prefecture forest conservation of soil nutrients,trees and hold,water conservation,carbon sequestration and oxygen release,and purify the atmosphere environment,and forest recreation six basic ecosystem service function value contains 12 indexes of important projects for the evaluation,The quality and value of each service function and its target were obtained,and further classified according to its stand type.The temporal and spatial dynamic changes were evaluated by mathematical statistics and cluster analysis.The results show that:(1)From 2000 to 2020,the total matter mass of forest ecosystem services in Zhejiang province increased from 139,399.6 million tons /a to179,8324 million tons /a,and the matter mass of protected soil changed from467,744,26 million tons /a to 464,16269 million tons /a.The matter mass of forest nutrient retention increased from 57,636,604 tons /a to 577,763,326 tons /a,the matter mass of water conservation increased from 138,88186 million tons /a to 15,058.5million tons /a,and the matter mass of carbon fixation and oxygen release increased from 41.175,456 million tons /a to 41.121,732 million tons /a.(2)From 2000 to 2020,the total value of forest ecosystem services in Zhejiang province increased from103.4108 billion yuan /a to 179.8324 billion yuan /a.The value of soil conservation increased from 76.4557 billion yuan /a to 145.3568 billion yuan /a,the value of forest nutrient retention increased from 6.6543 billion yuan /a to 12.6423 billion yuan /a,and the value of water conservation increased from 19.157 billion yuan /a to 20.7053 billion yuan /a.The value of air purification changed from 0.21.7 million yuan /a to0.21.4 million yuan /a,and the value of forest health increased from 5.390 billion yuan /a to 15.441.6 billion yuan /a.(3)The average annual economic value of forest ecosystem services of prefectural cities in Zhejiang province from 2000 to 2020 is lishui > Hangzhou > Wenzhou > Quzhou > Jinhua > Taizhou > Shaoxing > Ningbo >Huzhou > Zhoushan > Jiaxing.The overall distribution is more in the west and less in the east,and the growth rate is "fast in the west,slow in the east".(4)The overall contribution rate of forest ecosystem services in Zhejiang province was broadleaf forest > coniferous forest > shrub forest.