Carbon stock and sink economic values of forest ecosystem in the forest industry region of Heilongjiang Province,China

The values of forest carbon stock(CSV) and carbon sink(COV) are important topics in the global carbon cycle.We quantitatively analyzed the factors affecting changes in both for forest ecosystem in 2000-2015.With multiple linear stepwise regression analysis,we obtained the factors that had a significant impact on changes of CSV and COV,and then the impacts of these variables on CSV and COV were used for further quantitative analysis using the vector autoregressive model.Our results indicated that both stand age and afforestation area positively affect CSV and COV;however,the forest enterprise gross output value negatively affects CSV.Stand age has the largest long-term cumulative impact on CSV and COV,reaching 40.4% and 9.8%,respectively.The impact of enterprise gross output value and afforestation area on CSV and COV is the smallest,reaching 4.0% and 0.3%,respectively.