Effects Of Grassland Fencing On The Habitat Of Mongolian Gazelle(Procapra Gutturosa) In The Dalai Lake Area,Inner Mongolia

Based on the field survey, we studied the effects of grassland fencing on the habitat of Mongolian gazelle from December,2009to July,2011around Dalai Lake area of Inner Mongolia. We utilized the results of Luo Zhenhua, Zhang Bo and Qin LiXin, selected the main habitat factors of Mongolian gazelle, and established the single habitat factor evaluating criteria of the Mongolian gazelle habitat suitability evaluation system for each season. The suitability assessment model was established based on the spatial analysis model (Arc MAP9.3), used the model to obtain the habitat suitability of which affected by grassland fencing or not. We also analyzed the effects of grassland fencing on the habitat suitability of Mongolian gazelle. The conclusions were as the following:1.We recorded79populations,477individuals and36traces. Most of the spots distributed at Kerlun county and Arihashate town, while there was a few distributed at Beier county, Hulun town and the northeast of Dalai Lake.2. In2005, there were282grassland fencing, the total area was566.67km2. By the end of2010, there had been1006grassland fencing, the total area was2066.67km2. In2005, the grassland fencing area in Keerlun was the biggest, followed by Baodong and Hanwula. In2010, because of the wildly construction of fencing, grassland fencing mainly distribute at Hulun town, Keerlun county, Alatanemole town, Beier county and Arihashate town.3. In2005, when integrating the effect of grassland fencing, the decreasing proportion of the most suitable habitat varied in different season; a large quantity of the most suitable habitat became less suitable habitat, which led to the less suitable habitat increased in winter and spring, while in summer and autumn, as a result of part of less suitable habitat transformed into unsuitable habitat, the less suitable habitat decreased; the unsuitable habitat were enlarged in each seasons. In2010, the area variation trend of Mongolian gazelle habitat, which was caused by the effect of grassland fencing, were the same as that in2005.4. Compared with the results of habitat assessment, which was impacted by grassland fencing, the most suitable habitat in summer and autumn decreased, while that in spring and winter increased; the less suitable habitat area decreased; the unsuitable habitat area enlarged. The most suitable habitat in spring and winter increased, this was because the food abundance in the grassland fencing was higher than that out of the fencing in this period. Mongolian gazelle would endure and adjusted to the human impacts, and chose the area near the fencing. Besides spring was no-grazing season in the area, the intensity of livestock impacts was low. Due to the high food richness in summer. Mongolian gazelle avoidance the area which had high interference intensity and the nearby of the fencing, while the fencing density in2010was higher than that in2005, the most suitable habitat decreased most greatly in summer.