JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (5): 754-764.doi: 10.11849/zrzyxb.2013.05.005

• Resources Ecology • Previous Articles     Next Articles

Responses of Growing Season Vegetation Changes to Climatic Factors in Inner Mongolia Grassland

ZHANG Qing-yu1,2, WU Shao-hong1, ZHAO Dong-sheng1, DAI Er-fu1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-04-09 Revised:2012-09-06 Online:2013-05-20 Published:2013-05-20

Abstract:

Based on the MODIS NDVI data, growing season NDVI spatiotemporal change was analyzed and relationships between NDVI and temperature, precipitation were also explored for typical steppe, meadow steppe and desert steppe in Inner Mongolia during 2000-2010. The results indicated that growing season NDVI was increased by 0.735% a-1 in Inner Mongolia grassland. Typical steppe has significantly increased from 2000 to 2010 (1.063% a-1). However, NDVI showed decreased trend in part areas, which accounted for 31.807% of the study area. Decreasing areas are 8.664×104, 6.814×104, 2.841×104 km2 for typical steppe, meadow steppe and desert steppe, respectively. Most of the grasslands excluding meadow steppe had a higher correlation with precipitation than temperature. Correlations between NDVI and temperature and precipitation had the similar trend: meadow steppe>typical steppe>desert steppe. In addition, the result also shows that responses of the grassland to temperature and precipitation changes have a conspicuous lag effect and the lag times have obvious longitude and latitude characteristics with increasing longitude and latitude.

Key words: growing season NDVI, grassland types, lagged effects, Inner Mongolia

CLC Number: 

  • Q948.112