JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (6): 1186-1195.doi: 10.31497/zrzyxb.20190605

• Resource Utilization and Management • Previous Articles     Next Articles

Response of change trend of vegetation productivity to land use conversion in Ten Tributaries Basin of Ordos

Xue-lian BAI1(), Shu-xin JI1, Li-xiang WANG1, Zheng-xin CHEN2, Xue-li CHANG1()   

  1. 1. School of Resources and Environmental Engineering, Ludong University, Yantai 264025, Shandong, China
    2. Water Conservancy Science Research Institute of Inner Mongolia, Hohhot 010051, China
  • Received:2019-01-09 Revised:2019-03-30 Online:2019-06-20 Published:2019-06-20

Abstract:

Land cover/use change (LUCC), which is a focus in global changing study, deeply influences the geographical distribution pattern and productivity of terrestrial ecological system. Normalized differential vegetation index (NDVI), as a key indicator of vegetation productivity, plays an important role in assessing regional vegetation productivity. We selected Ten Tributaries Basin (TTB), where the Yellow River has ten first-level tributaries, to analyze the relationship between the vegetation change trend and LUCC conversion based on the annual data of MODIS NDVI from 2000 to 2015 in the northern part of Ordos, China. Meanwhile, this study employed trend analysis and transfer matrix to analyze the relationships. The results showed that the productivity had an increasing trend totally due to the dominance of grasslands in farming-pastoral region, and areas of significant increase and unsignificant increase account for 22.01% and 67.4% of the total area, respectively. The areas of unsignificant decrease, unchange and significant decrease account for 4.59%, 3.32% and 2.68%, respectively. Land conversion areas in unsignificant increase and significant increase come to 235146.08 hm2 and 82761.76 hm2, respectively. The conversion of grassland to farmland, woodland, water body, construction land and unused land, especially the conversion of grassland to farmland, led to the increase of vegetation productivity in corresponding regions.

Key words: NDVI, vegetation productivity, land use conversion, Ten Tributaries Basin