关键词: 山东银莲花, 稀有植物, 分布格局, 聚集强度

Abstract: Using the contiguous grid of quadrats, the distribution pattern and aggregating intensity of Anemone shikokiana from Hualiukou and Laoding of Laoshan and Hanfengling and Taiboding of Kunyushan were studied. Moreover, the influencing factors on the distribution pattern were analyzed. The results showed as follows: (1)Four populations were characterized by clumped distribution mainly because of biological characters. (2)The aggregating trend of A.shikokiana in shrub of mountaintop was stronger than that in understorey of conifer and broadleaf mixed forest. The main reason might be that the fruiting ratio of A.shikokiana in shrub of mountaintop was higher than that in understorey. We concluded that the wind may be one of pollinators of A.shikokiana. (3)The potential of population regeneration in understorey of conifer and broadleaf mixed forest was more vigorous than that in shrub of mountaintop because the germination of seeds and growing of seedings need the moist environment. (4)We deduced the community can be steady in natural state based on distribution of associated species. In this study, the distribution pattern and aggregating intensity of A.shikokiana were analyzed for the first time, which will provide the theoretic basis for conservation and application of A.shikokiana.

Key words: Anemone shikokiana(Makino) Makino, rare plant, distribution pattern, aggregating intensity