Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237, Lodz, Poland.
Department of Biodiversity Research, Global Change Research Institute AS CR, Bělidla 4a, 603 00, Brno, Czech Republic.
Sci Rep. 2022 Aug 17;12(1):13936. doi: 10.1038/s41598-022-18218-4.
Sobralia and Brasolia form a large complex of Neotropical Orchidaceae. Although the molecular and morphological studies allowed to increase the rate of work on the modern classification of the taxa, they still require the attention as remaining without complete revision. The niche similarity analysis between representatives of Sobralia and recently segregated from this taxon-genus Brasolia is presented. The ecological tolerance evolution within the group was investigated with molecular clock analysis and phylogeny as the background. The phylogenetic analysis has confirmed the previous results and placed Brasolia representatives in a single clade with Elleanthus and Sobralia core as a separated group. The molecular clock analysis suggests that Sobralia and Brasolia are relatively young groups that evolved between 8.5 and 8 million years ago. Distribution of suitable niches of studied species is generally congruent with the known geographical ranges of particular taxa. The calculated niche overlap did not indicate any correlation between niche overlap and species phylogenetic relationships and remains low for both intra- and intergeneric relationships. The reconstruction of climatic tolerance evolution indicated that the studied species of Brasolia and Sobralia are characterized by generally similar ecological tolerance for most of the analyzed variables.
索布拉西亚和布拉索利亚形成了一个大型的新热带兰科复合体。尽管分子和形态学研究提高了对现代分类群工作的效率，但它们仍然需要关注，因为它们还没有得到完整的修订。本文介绍了索布拉西亚代表和最近从该类群中分离出来的布拉索利亚属之间的生态位相似性分析。利用分子钟分析和系统发育作为背景，研究了该类群内的生态位适应性进化。系统发育分析证实了之前的结果，并将布拉索利亚属的代表放在一个单系群中，与埃利恩苏斯属和索布拉西亚核心属分开。分子钟分析表明，索布拉西亚和布拉索利亚是相对较年轻的群体，它们在 850 万至 800 万年前进化而来。研究物种的适宜生态位分布总体上与特定类群的已知地理范围一致。计算出的生态位重叠并没有表明生态位重叠与物种系统发育关系之间存在任何相关性，并且在种内和种间关系中都保持较低水平。气候适应性进化的重建表明，所研究的布拉索利亚和索布拉西亚物种在大多数分析变量上具有相似的生态适应性。
