秦巴林区草兔空间格局研究

草兔在不同样方中具有不同的聚集度和空问格局，但均是以个体为基本成分的均匀分布。草兔空间分布的聚集度随着取样面积的增大有增强的趋势，但增强的幅度随着取样面积的逐渐增大而逐渐缩小，最终趋于一个常数。从抛物线模型分析，当密度较小时，聚集块指标与密度有较好的一致性；而在密度较大时，聚集块指标与密度的一致性急剧下降，当密度等于3．3175时，模型出现极大值。从对数模型分析，当密度增加到一定限度时，聚集块指标趋于一个常数。

Spatial Distribution Patterns of Lepus capensis in the Mountaions of Qinling and Bashan

Crowding degrees and spatial distribution patterns of Lepus capensis differed in different sample plots, the spatial distribution pattern appeared a state of even distribution that the basic composition was individual. The crowding degree of L. capensis had the trend of aggrandizement with samples enlarged, but with the samples gradually enlarged, the range of aggrandizement gradually reduced, and tended to a constant. According to the parabola model, when the density was lower, crowding indexes and densities had preferable consistency; but when the density was higher, the consistency reduced quickly, when the density was 3.317 5, the model was maximum. Analysis on the logarithms model showed that, when the density increased to the certain limit, the crowding index inclined to a constant.