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Research on the evaluation of wetland ecosystem services of Songnen Plain during 1980—2010 |
KANG Hongxia, NA Xiaodong, ZANG Shuying |
Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province,Harbin Normal University, Harbin 150025, China |
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Abstract With the deepening of research on wetland ecosystems, researchers have paid more and more attention to wetland value of ecosystem service. The authors divided the wetland ecosystem services of the Songnen Plain into four categories, i.e., provisioning, regulating, cultural and supporting services, and their respective ecosystem characteristics, structures and processes were considered. The authors assessed and evaluated 10 ecosystem services from wetlands in the Songnen Plain during 1980—2010, namely material production, carbon sequestration, water retention ability, water quality purification, nutrient cycling, wild species habitat, recreation service, culture and scientific research, releasing oxygen and soil erosion control, based on Landsat MSS/TM, AVHRR and MODIS remote sensing image, and multi-source data such as basic geography, field survey and social statistics. The market value method, carbon tax and afforestation cost method, shadow engineering method, substitution expense, expert method and other methods were adopted. For the requirements of assessment operations, especially valuation of changes and spatial-temporal changes of wetland ecosystem services, the authors consider that the administrative districts and counties in Songnen could be taken as the assessing units. The results show that the total value of the ecosystem services for wetland of Songnen Plain in 1980, 1995, 2000 and 2010 were 377.45×108, 331.06×108, 321.37×108, 291.35×108 CNY, respectively. Among the four main categories, regulating service had the maximal value, followed by cultural service and supply service, and the support service had the lowest value. The regulating service and supply service declined year by year, with 1.69×108, 1.13×108 CNY per year. The cultural service was not stable and had twin peaks, one was 1980, and the other was 2010, with 0.45×108 CNY per year. Among ten subclasses, water quality purification and culture and scientific research services had higher value than others. Spatially, most of the wetland value decreased area was mainly embodied in the north, and most of the wetland value increased area was mainly located in central and southwest Songnen Plain. The results obtained by the authors provide decision makers’ theory support for the effective protection of the wetland resources and planning of development policy by means of quantitative evaluation of wetland ecosystem services.
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Keywords
fraction of absorbed photosynthetically active radiation(FPAR)
non-photosynthetic vegetation(NPV)
normalized difference vegetation index(NDVI)
enhanced vegetation index(EVI)
forest
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Issue Date: 03 May 2017
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