鄱阳湖流域生态系统服务价值演变研究

基于鄱阳湖流域2005年、2010年、2013年土地利用数据,利用GIS数据处理和空间分析技术、修正Costanza方法定量计算鄱阳湖流域生态系统服务价值,系统地分析了鄱阳湖流域生态系统服务价值的基本特征和演变规律.结果表明:1)鄱阳湖流域的生态系统服务价值呈现出持续增长的趋势,2005年、2010年、2013年全流域的生态系统服务价值总量分别为3 935.94亿元、5 855.94亿元、7 215.37亿元,其中林地对生态系统服务价值的贡献率最大,而水域面积的变化是影响生态价值变化的主要因素; 2)各子流域中赣江流域的生态价值最高,其次是鄱阳湖区,而饶河流域的生态系统服务价值最低,各流域内上中下游的生态价值分布特征也各有不同; 3)鄱阳湖流域生态价值空间分布出现明显的不均衡性,鄱阳湖及附近区域要远远高于其他地区,而各流域之间的相对差距和绝对差距则是呈现先扩大后缩小的趋势.

The Study on the Evolution of Ecosystem Service Value in Poyang Lake Basin

Based on the land use classification data of Poyang Lake Basin,this paper evaluated the ecological service value of Poyang Lake Basin by used GIS data processing and spatial analysis technology,with modified Costanza methods,and the basic characteristics and changes rule of the ecological service value of Poyang Lake Basin were systematic analyzed.The main results are summed up as follows.1)The value of ecological service in Poyang Lake Basin showed the trend of sustained growth,and the total basin value of ecological service value were 393.594,585.594,721.537 billion yuan in 2005,2010 and 2013,of which the woodland to the ecological value was the largest contribution and the water land changes was the main factor affecting the ecological service value of change.2)The ecological value of the Ganjiang Basin was the highest,followed by the Poyang lake area,the lowest value of the ecosystem service in the Raohe Basin.The distribution of ecological values in the upstream,middle stream and downstream of each basin was diverse too.3)The spatial distribution of ecological value of Poyang Lake Basin was obviously disequilibrium,and the Poyang Lake and its nearby area was much higher than other regions.Between the relative disparities and absolute disparities were the first to expand after the narrow trend.