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根据在宁夏青铜峡市4块不同类型样地上收集到的光肩星天牛(Anoplophoraglabripennis(Motsch))卵、幼虫和成虫的数量和位置资料,应用地统计学方法(geostatistics)对其种群的空间格局进行了研究,结果表明:在各种林型中天牛卵和幼虫的数量具有明显的空间依赖性,其变程分别为20~40m和28~170m,局部空间连续性强度分别为0.26~0.47和0.14~0.55;而成虫的数量没有表现出空间依赖性,在空间呈随机分布。对不同样方大小的变异曲线图进行比较得知:在一定范围内,变程不随样方的大小而变化;基台值随样方的大小呈明显的线性上升;局部空间连续性强度随样方的增大而呈指数式上升。对标准化后的空间协方差图、迟滞相关图和变异曲线图进行比较后发现:天牛卵的变程、空间不连续性强度均很接近;而幼虫有的比较相近,有的相差较大;成虫则都相差很大,这说明必须把这三者综合起来进行考虑,才能找到空间依赖性的正确距离。
According to the quantity and location data of eggs, larvae and adults of Anoplophora glabripennis (Motsch) collected from 4 different types of plots in Qingtongxia, Ningxia, the spatial pattern of their populations was studied by geostatistics The results showed that the numbers of eggs and larvae of Cerambycidae in all forest types were significantly spatial dependent, with the ranges of 20-40 m and 28-170 m, respectively, and the spatial intensity of local spatial continuity was 0.26-0. 47 and 0.14 ~ 0.55, respectively. However, the numbers of adults did not show spatial dependence and were randomly distributed in space. The comparison of the variation curves of different quadrats shows that within a certain range, the variation range does not change with the quadrat size; the abutment value increases linearly with the quadrat size; the intensity of local spatial continuity The square increases exponentially. After comparing the standardized spatial covariance plots, lag correlation plots and variation plots, we found that the variability and spatial discontinuities of Cerambycidae eggs are close to each other, while the larvae are similar and some are quite different. Adults are very different, which shows that these three must be considered together, in order to find the correct space-dependent distance.