中文摘要：

植被的动态变化及其与环境的关系已成为全球变化研究的热点问题。陆地样带是进行全球变化驱动因素梯度分析的有效途径。该研究依托中国东部南北样带（NSTEC），对南北样带不同时间尺度的气候因子和植被活动变化特征进行了分析，并重点阐述了具有代表性的12种植被类型对气候因子的响应方式。研究结果表明：南北样带植被的归一化植被指数（NDVI）的变化同时受控于气温和降水，但是在不同的空间和时间尺度上植被NDVI的响应方式各异。在年时间尺度上，只有温带落叶灌丛（TDS）的ND玎受气温控制；而温带禾草草原（TGS）和亚热带和热带针叶林（STCF）的NDVI同时受气温和降水调控。其他植被类型的年NDVI与年平均气温和年总降水量没有直接显著的联系，而受年内气温变化和降水分配状况的影响更大。在月时间尺度上，NDVI与气温的关系在不同类型植被之间存在很大差异。一般而言，植被NDVI与前4个月内的气温关系最为密切，并且从1月份N4月份气温的滞后时长在缩短。其中，温带针叶林（TCF）、温带落叶阔叶林（TDBF）、TDS、STCF和亚热带热带草丛（STG）等植被类型，5—8月的NDVI与气温普遍呈负相关关系。草原和灌丛植被类型当月NDVI与当月降水量主要以正相关为主，而森林类型当月NDVI与当月降水量主要以负相关为主。

英文摘要：

Aims Climate change characterized by global warming has sustainable development of human society. Our objective was to climate change. posed a great threat to terrestrial ecosystems and to examine the response of major vegetation types Methods We used the biweekly dataset of the National Oceanographic and Atmospheric Administra- tion/Advanced Very High Resolution Radiometer （NOAA/AVHRR） normalized difference vegetation index （NDV1） and climatic data from 752 standard stations in China for 1982-2006 to study the responses of 12 major vegetation types to changes in air temperature and precipitation. Important findings The ND VI trend was controlled by air temperature and precipitation at the transect scale, while the NDVI trend showed large spatial heterogeneity, possibly associated with changes in regional climate, land use and vegetation type. At the biome scale, annual NDVI of temperate deciduous shrubland （TDS） was sig- nificantly correlated with air temperature and that of temperate grass steppe （TGS） and subtropical and tropical coniferous forest （STCF） was significantly correlated with both air temperature and precipitation. No significant relationships were detected between NDVI and climatic factors in other types of vegetation. NDVI was most sig- nificantly correlated to the air temperature of the preceding four months. In addition, the time lag of NDVI re- sponses to air temperature gradually decreased from January to April. Negative correlations were found between NDVI and air temperature from May to August in temperate coniferous forest （TCF）, temperate deciduous broad-leaved forest （TDBF）, TDS, STCF and subtropical and tropical grassland （STG）. Results indicated a positive relationship between NDVI and precipitation of the same month in shrub and grassland types and a negativerelationship between ND VI and precipitation of the same month in forest.