XIAO Tao, HAN Guang, HAN Huarui. County-scaled Change of Land Cover in Arid Region and Its Ecological Environmental Effects——A Case Study in Wengniute Banner, Inner Mongolia[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 240-246.
XIAO Tao, HAN Guang, HAN Huarui. County-scaled Change of Land Cover in Arid Region and Its Ecological Environmental Effects——A Case Study in Wengniute Banner, Inner Mongolia[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 240-246. DOI: 10.13961/j.cnki.stbctb.2016.06.040.
[Objective] The characteristics of land use change and the comprehensive effects on eco-environment were assessed to provide a support for ecological reconstruction of the study area.[Methods] Based on the Landsat images of August 2006 and 2015
land use data of Wengniute Banner was extracted with ENVI 5.1.Indicators as land use dynamic degree
and land use type of spatial transfer matrix
and biological richness index
ecosystem service value and sensitivity index
spatial-temporal evolution characteristics and ecological environment effects of Wengniute Banner
Inner Mongolia were used.[Results] (1) The main land use types of Wengniute Banner were farmland
woodland
grassland and sandy land. In recent 10 years
farmland
grassland
construction land increased remarkably; while woodland
sandy land and water area manifested a decreasing trend. (2) Biological abundance index decreased from 43.47 in 2006 to 42.69 in 2015
reduced 1.97%. This is not beneficial to the development of bio-diversity; The total value of ecosystem services declined from 1.023 1×1010 yuan to 9.847 0×109 yuan during 2006 to 2015
decreased amount and rate were 3.84×108 yuan and 3.75%
respectively. Generally
the ecological environment maintains largely a balance
but with a slight degradation; (3) The sensitivity coefficients of various land use types were less than 1
indicating that the ecosystem service value is not sensitive to the coefficient
lacking flexibility.[Conclusion] In the study area
the sharp decrease of ecosystem service value can be attributed to the decrease of woodland and water area
and the increase of construction land. The decreased ecosystem service value and biological abundance resulted from land use change will exacerbate the vulnerability of local ecological environment.