云南地区蕨类植物多样性分布格局的生物地理学解释

Biogeographical Explanation of Distribution Pattern of Fern Diversity in Yunnan Province

目的:探讨云南地区不同生物地理分布区性质蕨类植物的分布格局,并探讨环境因子对不同生物地理分布区性质蕨类植物分布格局的差异性影响;方法:利用云南地区大尺度的蕨类植物分布信息,通过空间自回归方法探讨环境因子对不同生物地理分布区性质蕨类植物的分布格局的差异性解释;结果:云南地区温带蕨类植物多样性及其比重的高值主要出现在研究区域北部,而热带蕨类植物多样性及其比重的高值则主要出现在南部;相对温带蕨类植物的多样性,热带蕨类植物的多样性受到生境异质性因子更加强烈的影响。相对多样性指标,温、热带蕨类植物的比重更易受到气候因子的影响;结论:蕨类植物多样性及其比重的地理分布格局可能在一定程度上取决于其生物地理分布区性质。生境异质性对多样性格局的影响力可能与生物地理分布区性质有关。相对多样性指标,比重格局可能更受制于气候因素。

Objective ： To explore the distribution pattern of ferns with different biogeographical affinities in Yunnan, we explored the different influences of environmental factors on the distribution pattern of ferns with different biogeographical affinities. Methods： Using distribution information of ferns in large - scale ferns in Yunnan, spatial patterns of ferns with different biogeographical affinities were interpreted through spatial autoregressive models. Results： High diversity and proportion of temperate ferns in Yunnan were mainly observed in the northern part of the study area, while for tropical ferns, they were mostly observed in the south. The diversity of tropical ferns is most strongly influenced by the factors of habitat heterogeneity. However, for the proportion of temperate and tropical ferns, the most important factors are climatic factors ; Conclusions： The spatial patterns of fern diversity and proportions may, to a certain extent, depend on the taxa＇ geographical affinities. The influence strength of habitat heterogeneity on diversity pattern may de- pend on the taxa＇ geographical affinities. Compared be more subject to climatic factors. with diversity index, the patterns of the proportion may