Research On Service Value Evaluation And Dynamic Simulation Of Forest Ecosystem In Guizhou Province

In recent years,the assessment and dynamic simulation of forest ecosystem service value has become one of the research hotspots at home and abroad.Guizhou is an important ecological barrier in the upper reaches of the Yangtze River and Pearl River,and has a prominent position in the National Forest ecosystem.Guizhou is a national demonstration area of ecological civilization and plays an important role in the construction of national ecological civilization.Guizhou is also a typical karst area.The ecosystem is very fragile and difficult to repair.It is of great practical significance to explore and evaluate the service value of forest ecosystem reasonably for protecting the ecosystem.In view of the present situation of forest resources in Guizhou province,the index system of forest ecological service value evaluation in accordance with the characteristics of karst area is constructed,and the data of the first class forest census,the second class survey data and the social public data set of Guizhou Province are used.The value of forest ecosystem services in Guizhou Province from 2012 to 2016 was measured by different assessment methods with reference to the criteria of Forest ecosystem Services Assessment.The value of forest ecosystem service in each city(state)in 2016 was compared and analyzed.The coordination degree of forest eco-economic system in Guizhou from 2002 to 2016 was calculated and compared with that of the whole country.At the same time,based on the evaluation results and the principle of system dynamics,the ecosystem service value of Guizhou province from 2012 to 2025 is simulated dynamically,and the difference between the simulation results and the calculated results is compared.The main findings of the study are as follows:1)In 2016,the total value of forest ecosystem services in Guizhou Province was 65.56 billion yuan,with an average value of 67.8 million yuan per hectare per year;the value and proportion of each function were 24.86 billion yuan for product supply,38.2%,124.71 billion yuan for water conservation,19.14%,17.79 billion yuan for soil conservation,27.31% for carbon sequestration and oxygen release,10.9 billion yuan for carbon sequestration and oxygen release,respectively.The total value of forest ecosystem services in Guizhou Province increased by 11.7% annually from 2012 to 2016,with an average annual increase of 16.73% and 11.12% for air purification,118.029 billion yuan and 18.11% for biodiversity maintenance,24.539 billion yuan and 3.77% for landscape recreation.2)the value of forest ecological service in different cities(prefectures)is quite different.In 2016,the value of various functions ranked first in Qiannan Prefecture,Qiannan Prefecture for supplying Service value,and Qiandongnan Prefecture for Water Conservation,conserving soil.Carbon sequestration,oxygen release and air purification are Bijie,biodiversity conservation is Zunyi,landscape recreation is Guiyang.The order of total service value of forest ecosystem in each region is: southeast Guizhou,Bijie,Zunyi,South Guizhou,Tongren,Southwest Guizhou,Liupanshui,Guiyang,Anshun;Liupanshui,74400 yuan;southeast Guizhou,6.68 Ten thousand yuan;Zunyi,61900 yuan;Southwest Guizhou,61100 yuan,Tongren,58600 yuan;South Guizhou,53800 yuan;Anshun,50500 yuan;Bijie,40500 yuan.3)From the perspective of the relationship between forest ecosystem and economic system,the coordination degree of forest ecosystem and economic system in Guizhou Province increased steadily from 2002 to 2016,with an average of 0.576.Although it was in a barely coordinated state,it was generally better,and there was little difference compared with the whole country.4)the value of forest ecosystem services in Guizhou increased from 651.56 billion yuan in 2016 to 873.256 billion yuan in 2025 from the results of dynamic simulation and prediction.The value and average annual growth of the seven ecological functions in the period of 3.31.2025 are: the value of wood and forest products is 24.951 billion yuan,0.04%;Water conservation is worth 125.096 billion yuan,0.09 yuan;soil conservation is 242.81 billion yuan,3.41;carbon sequestration and oxygen release 173.494 billion yuan,5.3;purification of the atmosphere 97.791 billion yuan,3.39 The value of maintaining biodiversity is 158.419 billion yuan,3.39 yuan,and the value of landscape recreation is 50.694 billion yuan,8.85%.