摘要
以平均密度、聚集度指标(m m)和有虫样方比率为聚类因子,对日本龟蜡蚧1龄若虫的扩散规律进行了模糊聚类分析。结果发现,日本龟蜡蚧1龄若虫的扩散期是其孵化高峰前后;孵化高峰期为种群向更大的生境空间急剧扩张时期;孵化初、末期为种群聚集收缩时期。
The diffusing regularity of Ceroplastes japonicus′s 1^(st) instar nympha was studied by fuzzy cluster analysis, using average density, aggregation index and the ratio of quadrats with worms as cluster factors. The results showed that: before and after the peak of the hatching periods were the diffusing periods; the hatching peak is a period in which the population was rapidly extending to a larger habitat space; the beginning and the end of the hatching periods were aggregating and shrinking periods of the population.
出处
《河北林果研究》
2005年第2期103-106,共4页
Hebei Journal of Forestry and Orchard Research
基金
河北省自然科学基金项目。
关键词
扩散规律
种群动态
模糊聚类
日本龟蜡蚧
Ceroplastes japonicus
diffusing regularity
population dynamic state
fuzzy cluster
