中国5年间隔陆地生态系统空间分布数据集(1990-2010)内容与研发

A Time Series Land Ecosystem Classification Dataset of China in Five-Year Increments(1990–2010)

中国陆地生态系统类型空间分布数据集是在1990年、1995年、2000年、2005年和2010年卫星遥感数据基础上,结合地面调查研发的连续25年每5年间隔的中国生态系统数据集。该分类系统共划分为7个生态系统类型,包括:农田生态系统、森林生态系统、草地生态系统、水体与湿地生态系统、荒漠生态系统、聚落生态系统和其他生态系统。数据空间分辨率为100 m。其中,水体和湿地生态系统变化不大,聚落生态系统由占据总面积1.65%(1990)增至2.09%(2010);农田生态系统由18.65%(1990)增至18.80%(2010);而草地生态系统由31.98%(1990)降至31.56%(2010);森林生态系统由23.74%降至23.64%(2010)。这种变化总量在5年间隔期间呈波动变化特点。

Because the territories of China are vast and include a large range of different ecosystems, evaluating both their types and function has a profound impact on regional and national sustainable development. Thus, using land use and land cover(LULC) data for 1990, 1995, 2000, 2005, and 2010, we developed a multi-period spatiotemporal distribution dataset for Chinese land ecosystem types. This was accomplished by classifying and processing LULC data by identifying and studying major ecosystem types. The dataset reported in this study is significant because it enables the identification of ecosystem types at regional and national scales, and furthers our knowledge of the geographical distribution of ecosystem types. In addition, we are now able to more completely understand the spatial structure and evolutionary characteristics of Chinese ecological systems, support their ecosystem services, and ensure national ecological security. The dataset reported here comprises six files, five of which contain data and one that outlines our data sources.