[1]GUO Bing,JIANG Lin,SUN Caihong,et al.Dynamic Evaluation on Ecosystem Service Value of the Upper Reaches of Minjiang River Based on Multi-Source Data[J].Research of Soil and Water Conservation,2017,24(06):131-138.
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Dynamic Evaluation on Ecosystem Service Value of the Upper Reaches of Minjiang River Based on Multi-Source Data
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 06
Page number:
131-138
Column:
Public date:
2017-11-24
- Title:
- Dynamic Evaluation on Ecosystem Service Value of the Upper Reaches of Minjiang River Based on Multi-Source Data
- Keywords:
- upper reaches of Minjiang River; ecosystem service; environment economy method; value evaluation; spatial and temporal variations
- CLC:
- X87
- DOI:
- -
- Abstract:
- The Upper Reaches of Minjiang River, as a typically fragile eco-system zone, is an important ecological protection region of Yangtze River. Utilizing the geographic information system and remote sensing, we have obtained the evaluations of the soil conservation, carbon sequestration and oxygen release, nutrient cycling, organic production and water conservation in 2003, 2007, and 2013 with the models of regional water balance, RUSLE and CASA based on multi-source data (remote sensing images, meteorological observations, land-use types, and so on). Then the spatial and temporal change patterns of ecosystem service values of the Upper Reaches of Minjiang River were analyzed. The results showed that:(1) during 2003-2013, there were an increasing, trend in the gross of ecosystem service value for 2003-2007 and a decreasing trend for 2007-2013, respectively; (2) in 2007, the ecosystem service value of unit area increased compared with that of 2003 while there was a slightly decreasing change during 2007-2013; (3) each part of ecosystem service in the Upper Reaches of the Minjiang River reached the minimum value in October, while the values of water conservation and soil conservation reached the maximum in August; meanwhile, the values of carbon sequestration and oxygen release, the organic production, and nutrient recycling derived from net primary productivity (NPP) reached the maximum in July; (4) during 2003-2007, the ecosystem service value of Songpan county had the largest increase while that of Heishui County was the smallest; on the contrary, there was a decreasing trend in ecosystem service value for all five counties, among which the Wenchuan County had the largest reduction during 2007-2013; (5) compared with other land use types, the forest had higher capacities of soil conservation, net primary production, and water conservation. Therefore, it was of great importance to improve the condition of forest for raising the ecosystem service value of the Upper Reaches of Minjiang River. The main driving forces of ecosystem service value changes were composed of natural factors (such as earthquake, landslide, debris flow, vegetation, and climate fluctuations) and human disturbances (such as deforestation, land overuse, unreasonable economic structure). The improvement of ecosystem service value can reduce soil erosion and protect the farmland in the Middle and Lower reaches, which is of great significance for the sustainable economic development in the Upper Reaches of the Minjiang River. The results can not only provide the basis for the ecological environment management, but also strengthen the concept of environmental protection.
- References:
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1900-01-01