The role of niche breadth in oak phylogeography: Quercus glaucoides as a study case

系统地理学 生物 利基 遗传多样性 生物扩散 航程(航空) 生态学 进化生物学 环境生态位模型 分类单元 种内竞争 生态位 人口 栖息地 系统发育学 人口学 基因 社会学 复合材料 材料科学 生物化学
作者
Ricardo Gaytán‐Legaria,Ken Oyama,Eduardo Ruíz-Sánchez,Antonio González‐Rodríguez
出处
期刊:Journal of Biogeography [Wiley]
卷期号:50 (9): 1653-1667 被引量:1
标识
DOI:10.1111/jbi.14612
摘要

Abstract Aim The extent of genetic diversity and its distribution among populations have been associated with species attributes such as mating system, dispersal ability and geographic range size. Another attribute that could contribute to intraspecific phylogeographic patterns is niche breadth, but this has rarely been tested. Here, we ask whether a Mexican oak with a comparatively narrow climatic niche breadth has distinct genetic diversity patterns compared to other codistributed oaks with a broader climatic niche. Location Mexico. Taxon Quercus glaucoides M. Martens & Galeotti (Fagaceae). Methods Descriptors of genetic diversity and structure were calculated for 21 Q. glaucoides populations using chloroplast DNA (cpDNA) and nuclear microsatellites (nSSRs). Historical demographic dynamics were inferred with approximate Bayesian computation (ABC) and past potential distribution models. To test for an association between niche breadth and phylogeographic patterns, we used genetic diversity and differentiation values of Q. glaucoides plus those previously published for 10 other Mexican oak taxa. Niche breadth was estimated for all taxa and linear regressions were performed. Results Genetic diversity calculated from nSSRs ( H O = 0.539; H E = 0.714) was among the lowest and cpDNA differentiation ( N ST = 0.88) was the highest so far obtained for comparable Mexican oaks. Moderate changes in demographic size and distribution shifts throughout the last glacial cycle were inferred, explaining some of the observed genetic patterns. A positive correlation of H O and a negative correlation of N ST with niche breadth were detected across taxa. Main Conclusions Distinct phylogeographic patterns in Q. glaucoides could be explained because a narrower niche may cause lower historical effective population sizes and more fragmented distributions in comparison to species with a wider niche breadth, even with similar range sizes. Our results indicate that niche breadth would be an interesting ecological attribute to be included in future comparative phylogeographic studies.
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