| As an important ecosystem on earth,forest is known as the "lungs of the earth".Forests absorb carbon dioxide,have potential as a carbon sink,and their economic value is an important,effective and economical means of achieving carbon neutrality.Inner Mongolia is rich in forest resources and is an important ecological barrier at the border of northern Xinjiang in China.A number of ecological construction projects,including the Three North shelterbelt,natural forest protection,BeijingTianjin sandstorm source control,and returning farmland to forest,have all focused on Inner Mongolia and achieved remarkable results.However,there are still many problems in promoting ecological compensation mechanism.In this paper,the forest stock expansion method and biomass inventory method were used to calculate the total carbon sink and the carbon storage of the forest in Inner Mongolia from 1999 to 2018.The economic and ecological benefits of the forest carbon sink in Inner Mongolia were analyzed by coupling the forest carbon sink economic value evaluation method,and the ecological benefit compensation index and theoretical basis were combined.The standard of forest ecological compensation in Inner Mongolia was calibrated by using GDP ratio method,and industrial enterprises above designated size were included in the ecological compensation system.The results showed that:（1）The forest area,coverage rate,forest stock and live wood stock in Inner Mongolia showed an increasing trend after each inventory;（2）The carbon sequestration capacity of six dominant tree species increased,the total carbon storage increased from 25.110 Tg C to 41.296 Tg C,and the carbon storage increased by 16.186 Tg C.Total forest carbon sink increased from 135384.57 Tg C in 1999 to 192630.25 Tg C in 2018,and the potential of forest carbon sink increased from 13841.21 Tg C in 2003 to 58245.68 Tg C in 2018,with a total increase of 44404.47 Tg C.The total economic value of forest carbon sink in Inner Mongolia reached 6.3665 billion yuan in 20 years.（3）Enterprises in Inner Mongolia should pay 49.56 million yuan for forest carbon sequestration benefit compensation in1999,with an average of 35,600 yuan for each enterprise.By 2018,enterprises should pay 120.6 million yuan for forest carbon sequestration benefit compensation,with an average of 42,600 yuan for each enterprise.The average forest carbon sequestration compensation fee payable by each enterprise is less than 0.5% of the annual gross product of the enterprise,which has little impact on the collection of forest carbon sequestration compensation fees by enterprises.（4）Through the construction of ecological compensation index,the scope of ecological compensation and compensation method are clarified,the original research on ecological compensation based on forest ecosystem service value is improved,and the forest ecological compensation mechanism different from the traditional is established.The purpose of this study is to analyze the dynamic change of regional forest carbon sink and the economic and ecological value of carbon sink,and to provide reference for the construction and improvement of forest ecological compensation mechanism. |
