土地利用变化对植被碳储量的影响——以安徽省芜湖县为例

Effects of Land Use Change on the Vegetation Carbon

土地利用／植被覆盖是影响陆地上植被碳循环重要因子之一。该研究采用2000、2005、2010年3期的遥感影像，综合运用GIS和RS技术提取芜湖县2000～2010年土地利用变化数据，再根据前人对植被净初级生产力的研究成果，估算芜湖县土地利用变化对植被碳储量的影响。结果表明：在2000-2005年期间，约33．60km。耕地与19．50km。林地转化为草地、水域和建设用地，使得芜湖县植被碳储量约减少了9．54×10^3t。2005～2010年林地及草地大面积转化为建设用地，致使植被碳储量持续下降了约9．51×10^3t。该研究表明芜湖县植被碳储量减少趋势较为明显，其中林地面积变化对芜湖县植被碳储量影响最大。

Land use/vegetation coverage is one of the important factors influencing the land vegetation carbon cycle. By 2000, 2005 and 2010 issue of remote sensing image interpretation and integrated use of GIS and RS technology to extract the WuHu County land use change data during 2000-2010. According to the research achievements of predecessors to vegetation net primary productivity, influence of land use change on the vegetation carbon was estimated. The results showed that from 2000 to 2010, about 33.60 km^2 forest land and 19.50 km^2 cultivated land trans- ferred into grassland, water area and construction land, makes the Wuhu County vegetation carbon decreased 9.54 × 103 t. From 2005 to 2010, woodland and grassland area transferred into construction land, the vegetation carbon declining 9.51 × 10^3 t. The results showed that Wuhu Coun- ty vegetation carbon showed a trend of decrease, and woodland area of change was the main factor influencing the vegetation carbon changes in Wuhu County.