钻天柳种群空间分布格局及种内种间竞争的分析

Analysis of Chosenia arbutifolia Spatial Distribution Pattern and Intraspecific and Interspecific Competition

从种群生态学的角度出发,研究钻天柳地理分布特点、钻天柳与伴生种之间的关系、钻天柳的空间分布格局等。结果表明:(1)钻天柳纯林有增长型种群、衰退型种群、稳定型种群;钻天柳与其它树种所形成的3个混交林种群,幼龄钻天柳株数均明显小于成、过熟株数,表现为衰退型种群,由此可见,钻天柳群落的稳定性极差。(2)钻天柳种群多数为聚集性分布,少数为随机性分布。(3)钻天柳种群所处群落的竞争指数表明,钻天柳纯林的竞争强度(单位面积竞争强度)明显高于钻天柳混交林,且随着林龄的增加,林分的竞争强度呈减弱趋势。

Currently, the Chosenia arbutifolia population ecology research is rare, in this paper, from the perspective of population ecology, study on the geographical distribution features, competition between Chosenia arbutifolia intraspecific and interspecific, the spatial distribution pattern of Chosenia arbutifolia, the results show that： （ 1 ） Chosenia arbutifolia pure forest have growing population, declining populations, stable populations. Chosenia arbutifolia and other tree species are formed three mixed forest populations, the young Chosenia arbutifolia number of trees are significantly smaller than the mature Chosenia arbutifolia number of trees, performance for the declining population, this shows, Chosenia arbutifolia in poor stability. （2） The majority of Chosenia arbutifolia populations aggregation distribution, few randomness distribution. （3） Chosenia arbntifolia populations in which the community competition index show that, the Chosenia arbutifolia pure forest competition intensity（ Competitive strength per unit area） was significantly higher than the Chosenia arbutifolia mixed forest, with the increase of forest age, forest the intensity of competition showed decreasing trends. Provide useful informa- tion and suggestions formulated in this paper for recovery and reasonable protection measures of Chosenia arbutifolia popula- tion.