| Nature reserve’ value is much higher than other ecosystemsin the protection of optimizing environment and disaster prevention governance. The value evaluation is not only the basis of the natural reserve sustainable development, but also the urgently needed to solve problems in the process of social development.Combining the researeh of national seience foundation(41271554), and choosing the Jiuzhaigou Natural Reserve as study area. According to the aviation image in 2004 and 2013 as the information source,the application of remote sensin(RS),geographic information system(GIS),through the use of ENVl 4.8 and Arc GIS 10.0 and Fragstats3.3 andother related software,analyzed the Jiuzhaigou Nature Reserve landscape pattern.Use grid as the basic unit to build the cosystem services value index system of jiuzhaigou nature reserve and statistically analyzing the spatial distribution characteristics. Research quantitatively under relatively high precision small regional ecosystem services value assessment, and analyzes its change rule in time scale, further reveals the jiuzhaigou nature reserve’ ecosystem service function value of time and space distribution rule. The results showed that:The study area in 2013 from 2004, forest land, shrub, woodlands, construction land area decreased, snow and ice, bare rock, grassland, water area increased. All patch types’ fragmentationare rised in different degree.In the seven valleys of the study area,Besides zharu valley, patch shape complexity degree are increased. Zharu valley became the highest patch shape complexity area. Zezhawavalley, Zangmalongli valley, Rize valley,Pujilongli valley and Danzu valley’ sfragmentation degree are reduced.the landscape pattern tends to be reasonable, while Zharu valley and Shuzheng valley’ s fagmentation degree are increased.In 2013 compared with 2004,The ecosystem service value are reduced about 6.6355708 billion yuan.6 kinds of land use types in the study area’s ecosystem service value from high to low orderis:forest land > brush> Bare rock > water >grassland>construction land. Each single ecosystem services value from high to low in turn is: maintain biodiversity > gas regulation > hydrology regulation > climate regulation >keep the soil > production of raw materials> waste disposal> provide aesthetic landscape> food production.The total value contributionfrom high to lowin turn is Zezhawa valley > Zharu valley > Rize valley > Shuzheng valley > Dandu valley > Zangmalongli valley > Pujilongli valley. From the point of spatial distribution, the study area ecosystem service value are uneven distribution of space. The value increases maximum grid units are mainly distributed in the northwestern of Shuzheng valley and the central of Rize valley and the border of Shuzheng valley and Zezhawa valley. The value reduces grid units are mainly distributed in thesouthwest of Shuzheng valley and the southeast of Zharu valley. From 2004 to 2013, each single ecosystem service value in the study area are decreased,Each valley’s ecosystem service value are decreased in different degree. The rate of change from high to low in turn is:Shuzheng valley>Danzu valley>Pujilongli valley>Zezhawa valley>Zharu valley>Rize valley. |
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