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《Journal of Anhui Agricultural Sciences》 2009-08
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Spatial Characteristics of Vegetation Cover and NPP Change under Climate Change in Poyang Lake Area

DING Ming-jun et al(School of Geography and Environment,Jiangxi Normal University,Nanchang,Jiangxi 330022)  
Utilizing climatic data(temperature and rainfall) from meteorological station,NDVI(Normalized Difference Vegetation Index,AVHRR NDVI product of 8 km) and net primary productivity(NPP of 1 km) simulated by GLO-PEM model in the region of Poyang Lake from 1981 to 2000,this study assessed the trend of climate(e.g.annual mean temperature and annual rainfall),yearly biggest NDVI and yearly NPP change,the relationship between NDVI and climate factors,the relationship between NPP and climate factor.The results showed that: in recent years,the annual mean temperature and annual rain has increased obviously in the region of Poyang Lake,but the change range was different in different areas;from 1982 to 2000,the yearly biggest NDVI has increased obviously in the most areas of Poyang Lake;but in a few areas,it showed a decreasing tendency and did not pass the significance test;the NPP of Poyang Lake displayed an increasing tendency from 1980 to 2000,the increasing range of the whole Poyang Lake,the lakefront region and the marginal area was 111 257 t/a,49 920 t/a and 61 337 t/a,respectively;in the different buffer zones from the lake,the change of NPP had the same change tendency,which showed that the climate played an important role in the vegetation growth in the region of Poyang Lake.
【Fund】: 国家自然科学基金项目(40561011)资助
【CateGory Index】: Q948
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