关键词: 寄生植物, 寄主, 植食性动物, 取食, 相互关系

Abstract: Through field investigation, 20 common plant species were selected from 50 plots of Pinus bungeana community in Xiaolongshan to analyze their interspecific associations by using multispecies relevance (variance ratio, VR), χ²test, Ochiai index, Dice index, Jaccard index, AC value, PC value, Pearson’s correlation coefficient, and Spearman’s rank correlation coefficient. The VR analysis showed that the associations between the main components of the community were mainly of positive, demonstrating that the nature of the community was consistent with the characteristics of its living environment, and the community was adapted to its outside environment. The species-pair associations among the 20 common species had different properties, which showed the inner environment of the community and was caused by the heterogeneity of the environment within the community. Considering the ecological characteristics of plants, the community was divided into three ecological species groups. It was found that the high proportion of negative association in the community was caused by the shade shrubs under the trees, and the high independence of the community was caused by the plants from the forest edge. The study of interspecific association could reflec
t the organic link formed by the ecological characteristics of plant species, an
d the  results would have certain practical significance for the protect
ion and restoration of P. bungeana community.

Key words: Parasite plants, Host, Herbivores, Interactions