The Spatial and Temporal Distribution of Grassland Vegetation Degradation and Analysis of Anthropogenic Factors in Maqu County
Based on the remote sensing data of grassland and pastoral grassland data in Maqu,the spatial and temporal distribution of grassland degradation and the relationship with different human factors were quantitatively analyzed.The results showed that:①The main types of the grassland vegetation degradation was the senior grassland degenerated into the secondary grassland,and since 2008,the spatial distribution of grassland vegetation degradation mainly shifted from high altitude areas in northwest to low altitude areas in southeast.② From the macro-level analysis,there were negative correlations between the proportion of grassland degraded and ratio of joint households,sheep hematocrit and family pasture area,but positively correlated with population density and livestock density.③From the micro-level analysis,with the increase of family labor burden coefficient,the ratio of edible forage and vegetation coverage showed the inverted U-shaped distribution.With the decrease of grazing intensity,the ratio of edible forage excepted leguminous and vegetation coverage showed a slow growth trend.With the increase of jointhousehold sizes,the ratio of edible forage and vegetation coverage showed the distribution of inverted Ushaped,and the numbers of rat holes showed inverted U-shaped distribution.But with the decrease of grazing intensity,the numbers of rat holes gradually decreased.However,the government implemented the certain eco-compensation policies and strengthen supervision herdsman could change their game strategies,and ultimately achieved a "no increase the number of grazing" for the new "Nash equilibrium"
Grassland vegetation degradationAnthropogenic factorsThe spatial and temporal distributionNash equilibrium
NETL
NSTL
万方数据
维普
