Correlation Analysis Between The Desert Rodent Community And The Plant Community, Soil Under Different Disturbance

We select forbid grazing and over grazing two different disturbance plots in inner Mongolia desert region form 2006 to 2008, analysis between the desert rodent and the plant community ,soil was analysed using trapday method and Spearman and Pearson correlation analysis. The results showed:(1) The composition of dominant rodent populations and sub-dominant populations were different under different types of disturbance, mid-day gerbil(Meriones meridianus) and striped hamste(rCricetulus barabensis)both were dominant populations in forbidden grazing area where mongolia fivetoed jerboa(Allactaga sibirica) and mongolian gerbil(Meriones unguiculatus) both were sub-dominant populations; northern three-toed jerboa(Dipus sagitta) and desert hamster(Phodopus roborovskii) both were dominant populations in over grazing area where mid-day gerbil was sub-dominant population.(2) Number of shrub species had slightly higher than forbidden grazing areas in over grazing area; Herb species is much higher than over grazing area in forbidden area.(3) The surface soil had a minimum hardness under different disturbance and the forbidden grazing area had a significantly greater hardness than the over grazing area. Soil water content increased with increasing soil depth and the surface soil had a lower water content.(4) The correlation between the dominant species and the different depths of soil hardness had no significant under different disturbance(P<0.05). There was a significant negative correlation between the striped hamster and the soil water content in depth of 10~15 cm and 15~20 cm(P<0.05); There were highly significant positive correlation between the mongolia fivetoed jerboa and the soil water content in depth of 0~5 cm and 5~10 cm (P<0.01) and had significant negative correlation with the soil water content in depth of 10~15 cm and 15~20 cm in forbidden grazing area (P<0.05). The correlation between the desert hamster and the soil water content in depth of 0~5cm,5~10cm and 15~20 cm had a highly significant negative correlation in over grazing area (P<0.01).(5)In forbidden grazing area , the striped hamster selected habitat the Oxytropis aciphylla distributed;the mid-day gerbil selected habitat the Pennisetum flaecidum or Artemisia subdigitata distributed;the mongolia fivetoed jerboa selected habitat the Salsola passerine or Artemisia subdigitata distributed but will don't select the Pennisetum flaecidum or Eragrostis minor distributed;the mongolian gerbil selected habitat the Reaumures soongorics or Pennisetum flaecidum distributed but will don't selected the Caragana brachypoda distributed. In over grazing area , northern three-toed jerboa habitat will don't select the distribution of Caragana tibetica,Pennisetum flaecidum and bassia dasyphylla distributed; the desert hamster and mid-day gerbil both selected habitat the Zygophyllum pterocarpum distributed,but the mid-day gerbil habitat will don't select the Caragana tibetica distributed.(6)The species of plant community and rodent community had a ecological equivalence under different types of disturbance in Alashan Region,it was accord with the hypothesis of neutral theory.