延安地区东亚钳蝎的空间分布型及随季节分布情况探究

Study on Spatial Distribution Pattern and Seasonal Distribution of Buthus martensii in Yan'an

目的:了解延安地区东亚钳蝎种群数量消长和野外空间分布情况。方法:每月1、10、20日定点采集东亚钳蝎样本,采用扩散型指标、Taylor幂法则及Lwao m-珋回归对采集量进行计数。结果:Taylor幂法则回归方程式为:lgS2=1.6671 lg+0.1554;Lwaom-回归方程式为:m=1.3179+1.5133。东亚钳蝎空间分布型为负二项分布,在野外种群消长曲线呈单峰型。结论:延安地区东亚钳蝎空间格局是以个体群为基本成分呈聚集分布,且密度越高,聚集度越大。

Objective： To study population dynamics of Buthus martensii and its wild spatial distribution pattern in Yan＇an. Methods： Every month,the 1st,10th and 20th day were designated to collect Buthus martensii samples and count on the collection by using expansion pattern target,Taylor power law and Lwao m-x regression analysis. Results： Taylor power law regression equation was lg S2= 1. 6671 lg ＋0. 1554; Lwao m- regression equation was m =1. 3179 ＋1. 5133. The spatial distribution pattern of Buthus martensii was negative binomial distribution and its population fluctuation curve in the wild presented a single peak. Conclusion： Spatial pattern of Buthus martensii in Yan＇an is aggregated distribution which based on individual group,and the higher density,the greater aggregation degree.