Abstract:
The improvement of ecosystem service and ecosystem product value is one of the main goal of vegetation restoration in mining area. Using remote sensing image data, field survey data and economic statistics data before and after the operation of vegetation restoration in Shendong Mining, an ecosystem product value accounting model was established based on the value equivalent factor method, and the ecosystem quality adjustment coefficient was introduced to consider the differences within the ecosystem. The model was used to quantified the ecosystem product value of different vegetation restoration area and the whole mining area in recent 30 years. The relationship between the spatial-temporal variation of ecosystem product value and different vegetation restoration patterns was analyzed, and the benefits of different vegetation restoration patterns in Shendong Mining area were also evaluated. The results showed that (1) In the past 30 years, the total ecosystem product value increased by 657 million yuan, and the value per unit area increased by 0.84 million yuan/km
2. Areas with increased value account for 65.35%, mainly located in the east of the mining area and the most parts of the west, while areas with decreased value account for 33.32%, mainly in the banks of Wulan Mulun River and the marginal areas of the west. (2) The ecosystem product value of different service functions from high to low in order was: regulatory services (335 million yuan), supply service (184 million yuan), support services (114 million yuan), cultural services (23 million yuan), and the one with the highest value increment rate was the regulation service, with a total change rate of 273.78%. (3) The ecosystem product value per unit area of different vegetation restoration patterns from high to low in order was: economic forest pattern (2.91 million yuan/km
2), industry-ecology pattern (1.82 million yuan/km
2), ecological forest pattern (1.72 million yuan/km
2), sand control pattern (1.67 million yuan/km
2). All four vegetation restoration patterns showed increasing trend in ecosystem product value. Among all these patterns, the economic forest pattern, with both ecological function and economic benefits, had the most significant effect on enhancing the ecosystem product value in study area. The industry-ecology and ecological forest patterns that can provide high regulation and support services had certain contribution to the ecosystem product value of mining area. For sand control pattern, the regulation and support services are high but the supply and cultural services are low. However, due to its low background value, the value increment of ecosystem product per unit area is large. Evaluating the value changes of ecosystem products before and after the implementation of vegetation restoration projects can not only find out the inappropriate activities in the process of vegetation restoration in time, but also provide references for the development of scientific vegetation restoration plans in Shendong Mining areas.