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虽然生境过滤对群落多样性及空间分布格局的影响被普遍承认,很多研究也对不同年龄结构树木与生境的关联程度及种间差异进行了探讨,但是针对植物生活史初期特别是植物更新与生境过滤的关系及其对群落结构的影响却鲜有报道.本文综合分析了古田山亚热带常绿阔叶林24 hm2样地幼苗空间分布、更新动态与生境的关系,结果显示:(1)对24个物种更新格局进行基于Torus-translation的生境关联性检验,有11个物种表现出与特定生境类型显著相关,其中7个树种表现出对特定生境的显著正关联;(2)通过对幼苗群落中存活一年以上个体的指示种分析,确定了8个具有代表性的生境指示种及8对物种组合单元;(3)通过与以往针对胸径≥1 cm木本植物(非幼苗个体)的相关研究结果进行比较,发现样地内不同树木的幼苗与其对应的非幼苗个体的生境关联性均存在差别,表明生境过滤的影响会随着树木生活史阶段的不同而有所差别.研究结果从不同角度证实了生境过滤对森林幼苗更新的影响,进一步说明了物种和生境关联性、生物个体间相互作用等生态学过程在树木生活史初期就已有所体现,并对整个森林群落多样性格局的形成具有重要影响.
Although the impact of habitat filtration on community diversity and spatial distribution pattern is generally acknowledged, many studies have also discussed the relationship between the tree species and habitat and the interspecific differences among different age groups. However, in the early stage of plant life, especially in plant regeneration and habitat The relationship between filtration and its impact on community structure is seldom reported.In this paper, the spatial distribution of 24 hm2 seedlings in subtropical evergreen broad-leaved forest in Gutian Mountain and their relationship with habitats were analyzed. The results showed that: (1) 11 species showed significant correlation with specific habitat types, of which 7 species showed a significant positive correlation with specific habitats; (2) Through the analysis of Torus-translation-based habitat correlation test, Eight representative representative Habitat Indicator Species and eight pairs of species combination units were identified; (3) By comparing with the previous studies on woody plants ≥1 cm in DBH (non-seedlings) The results were compared and found that there was a difference in the habitat relationships between the seedlings of different trees and their corresponding non-seedlings in the sample plots, indicating that the impact of habitat filtration Will vary with the stage of the tree life history.The results from different angles confirmed the impact of habitat filtration on the regeneration of forest seedlings further illustrate the relationship between species and habitat, biological interactions between individuals and other ecological processes in the trees The life history has already been reflected at the beginning, and has an important influence on the formation of the diversity pattern of the entire forest community.