RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (09): 1599-1605.doi: 10.11870/cjlyzyyhj201509022

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Spatial-temporal variation characteristics of the soil conservation function and its economic value in the southern hill and mountain area, china

XU Lian-fang1, ZHANG Hai-bo2,3,4, ZHANG Ming-yang3,4, WANG Ke-lin3,4   

  1. 1. Hunan Planning Institute of Land and Resources. Changsha 410007, China;
    2. College of Resources and Environmental science, Hunan Normal University, Changsha 410080, China;
    3. Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    4. Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, China
  • Received:2014-11-24 Revised:2015-03-24 Online:2015-09-20

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Abstract: Assessment of ecosystem services is the basis of scientific ecosystem management and sustainable use of natural resources. Today, ecosystem services assessment has become a hot spot in the fields of ecology and ecological economics. Soil conservation service, as one of the most important regulating services provided by ecosystems, guarantees the ecological security and sustainable development of a region. The ecosystem function of the soil conservation was analyzed in the southern hilly and mountainous area in this paper, based on the ecosystem type data of 2000, 2005 and 2010, and the Universal Soil Loss Equation (USLE), with the support of RS and GIS. The results showed that: The total amount of soil conservation presented an upward trend and increased by 76.79×107 t during 2000-2010, and forest, shrub, wetland ecosystem were the main contributors (total ratios were 2.29%, 82.59% and 80.58% in 2000, 2005 and 2010, respectively). Total amount of soil conservation had a significant difference among different ecosystem types with a decreasing order: forestland > shrub > farmland > grassland > wetland > artificial surface > sparsely, While the capacity of soil conservation had a significant difference among different ecosystem types with a decreasing order: wetland > grassland > shrub > forestland > farmland > artificial surface > sparsely; The total economic value of soil conservation function had increased by 270.34×108 Yuan, in which the main type was the economic values of maintaining soil fertility; The main change of economic value of soil conservation function presented a slight increase, and the area where value had increased and its range were more than the decreased and its range. To rationally increase the vegetation coverage through reliable ecosystem management based on local conditions would make good effect in preventing soil erosion and maintaining soil nutrient in the region. However, the soil conservation functions of ecosystems in the region were only one contribution of the overall ecosystem services provided by them. The economic value of other ecosystem services together may be far higher. Therefore we concluded that the total economic value of ecosystem services must be a quite substantial contribution to the human welfare in the local areas analyzed. In addition, it was impossible to replace them by man-made ways. With this work we hoped to contribute to the conservation of soil of the region and the restoration of ecosystem services of soils in the region.

Key words: southern hilly mountain zone, soil conservation, economic value, dynamic change

CLC Number: 

  • F062.2
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