中文摘要：

中国西南喀斯特区自1999年开始实施了退耕还林（草）与生态移民等生态恢复措施。对不同恢复阶段植被碳储量的研究对评估生态恢复措施的生态服务效益具有重要意义。本文基于2000--2010年连续11年的MODIS遥感数据，结合气象与样地调查数据，运用地理信息系统技术，对桂西北典型喀斯特区植被碳储量时空特征进行了分析。结果表明：植被净初级生产力（net primarypro ductivity，NPP）和生态系统净初级生产力（net ecosystern productivity，NEP）均呈波动上升变化趋势，11年间年均NPP和NEP分别为396．61和370．58gC·m-2，变化显著的面积比例分别为21．14％和18．09％（P〈0．05）；年均NPP、NEP及其变化趋势在不同分区之间存在差异，年均NPP和NEP以西部喀斯特区最高（NPP：422．73gC·m-2，NEP：397．25gC·m-2），10年变化率则以石漠化治理区最大（NPP：34．20gC·m-2，NEP：30．30gC·m-2）（P〈0．05）；年均NPP、NEP与降水或温度之间相关性不显著，各植被类型NPP和NEP变化趋势相关性程度不同；桂西北喀斯特区退耕还林（草）与生态移民生态恢复措施显著增加了植被碳储量，提升了生态服务效益。

英文摘要：

It is important to investigate the vegetation carbon storage for assessing the ecological services of ecological restoration measures in karst areas of southwest China, where the Grain for Green Program and ecological emigration have been deployed since 1999. The temporal-spatial dynamics of vegetation carbon storage in the typical karst region of northwest Guangxi during 2000 -2010 were analyzed based on MODIS remote sensing data and weather data in couple of the technique of geographic information system. Vegetation net primary productivity （NPP） and net ecosystem production （NEP） tended to increase NPP and NEP of 396.6l g C ·m-2 and 370.58 with fluctuation during 2000-2010, with annual g C ·m-2, respectively, and the percentages of area with significant changes （P〈0.05） for NPP and NEP were 21.14% and 18.09% , respectively. With regard to spatial distribution, greater values were recorded in the western non-karst areas （ NPP： 422.73 g C ·m-2 ; NEP ： 397.25 g C ·m-2 ） , while the largest increments of NPP and NEP were recorded in the eastern part of restoration area of karst rocky desertification （ NPP 34.20 g C·m-2, NEP 30.30 g C ·m-2） （P〈0.05）. No significant correlation was found between annual NPP, NEP and precipitation or temperature. This study suggests that the vegetation carbon storage has been significantly increased by ecological restoration measures, such as ecological emigration, Grain for Green Program and accordingly the ecological services have been improved in this region.