生态环境学报2018，Vol.27Issue(5)：818-826,9.DOI:10.16258/j.cnki.1674-5906.2018.05.004
广东康禾自然保护区地面苔藓种群分布与格局分析
Population Distribution and Pattern Analysis of Terrestrial Bryophytes in Kanghe Nature Reserve, Guangdong Province
摘要
Abstract
Population distribution patterns are the key characteristics of plant communities. Investigating population distribution patterns is fundamental to the understanding of the formation and assembly of plant communities. Here, we conducted a study on the population distribution patterns of ground bryophytes in Kanghe Nature Reserve of Guangdong Province, and tested various patterns using Poisson Model and the variance/mean approach. We also analyzed their pattern changes with Two-term local quadrat variance (TTLQV) technique. The results showed that most bryophyte species were distributed in a clumped pattern, and the dominant species Pseudotaxiphyllum pohliaecarpum had the highest mean crowding index(m*=13.04)and the lowest clustering index(m*/m=1.15), followed by Haplocladium microphyllum and Kurzia gonyotricha with a mean crowding index of 11.85 and 10,respectively;while the two non-dominant species, Radula obscura and Plagiochila flexuosa, had the highest patchiness index of 14.79 and 14.45, respectively. These results suggested that the dominant species had stronger interspecific competition than non-dominant species, while the non-dominant species followed a more aggregated distribution pattern. Changes in population distribution patterns indicated that the pattern scale of the bryophytes was dominated by small sizes in the study area. Several species were clumped at block 4, 5, 15, 22, and 24, such as Kurzia gonyotricha, Lejeunea eifrigii, Pseudotaxiphyllum pohliaecarpum, Brotherella henonii. The scale difference in their distribution patterns was closely related to the survival strategies and habitats of the bryophytes. The pattern changes of liverworts and bryophytes were more similar at block 4, with large patches and an overall mosaic pattern; while the mosses had large patches at block 5, 16 and 22, due to larger peak fluctuations. These results indicate that the dominant populations of liverworts play leading role in the community assembly. Different bryophytes exhibite different pattern changes, which are mainly affected by their biological characteristics and interspecific competition, while habitat heterogeneity is chiefly responsible for the clumped distribution of bryophytes.关键词
种群分布格局/格局分析/苔藓植物/集群分布/TTLQVKey words
population distribution pattern/pattern analysis/bryophytes/clumped distribution/TTLQV分类
生物科学引用本文复制引用
蒋甜甜,杨学成,钟泳林,徐明锋,唐启明,苏志尧..广东康禾自然保护区地面苔藓种群分布与格局分析[J].生态环境学报,2018,27(5):818-826,9.基金项目
广东省科技计划项目(2013B020305008) （2013B020305008）
