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Plant communities in tropical ancient mountains: how are they spatially and evolutionary structured?
Botanical Journal of the Linnean Society ( IF 2.4 ) Pub Date : 2021-01-24 , DOI: 10.1093/botlinnean/boab017
Jacqueline S de Mattos 1 , Leonor Patrícia C Morellato 2 , Marco Antonio Batalha 1
Affiliation  

The integration of phylogenetic methods and species distribution can really help in the investigation of biogeographic patterns and to fill gaps in evolutionary ecology. Here we investigated how the vascular flora of the Brazilian ancient Cipó Mountains, an alleged OCBIL (old, climatic buffered infertile landscape) with a high diversity of species and endemism, evolved across that harsh archipelago-like system and altitudinal gradient. We used a node-based analysis of species distributions that follows the concepts of over- and underrepresentation and takes into account the relationship between sister clades, to yield two very statistically tractable metrics: the geographical node divergence and specific over-representation score. We collected and identified plant species along an elevational gradient ranging from 800 to 1400 m a.s.l. We also collected environmental variables such as elevation and soil properties. We found three allopatric nodes, which revealed the major biogeographic shifts in this tropical mountaintop vegetation. We found evidence to support the idea that environmental filtering is significantly shaping the distribution of biological communities and is restraining clades in the phylogeny. We argue that our study offers new insights into the biogeographic history and distributional shifts of the ancient rocky grasslands flora and to mountaintop vegetation systems in general.

中文翻译:

热带古山区的植物群落:它们的空间和进化结构如何?

系统发育方法和物种分布的整合可以真正帮助研究生物地理模式并填补进化生态学的空白。在这里,我们调查了巴西古 Cipó 山脉的维管植物群,即所谓的 OCBIL(古老的、气候缓冲的不育景观),具有高度的物种多样性和特有性,是如何在严酷的类似群岛的系统和海拔梯度中进化而来的。我们对物种分布进行了基于节点的分析,该分析遵循了过度代表和代表不足的概念,并考虑了姐妹进化枝之间的关系,以产生两个非常易于统计的指标:地理节点差异和特定的过度代表得分。我们沿海拔 800 至 1400 m asl 的海拔梯度收集并鉴定了植物物种 我们还收集了环境变量,例如海拔和土壤特性。我们发现了三个异域节点,揭示了这个热带山顶植被的主要生物地理变化。我们发现证据支持环境过滤正在显着塑造生物群落的分布并抑制系统发育中的进化枝的观点。我们认为,我们的研究为古代岩石草原植物群的生物地理历史和分布变化以及一般的山顶植被系统提供了新的见解。我们发现证据支持环境过滤正在显着塑造生物群落的分布并抑制系统发育中的进化枝的观点。我们认为,我们的研究为古代岩石草原植物群的生物地理历史和分布变化以及一般的山顶植被系统提供了新的见解。我们发现证据支持环境过滤正在显着塑造生物群落的分布并抑制系统发育中的进化枝的观点。我们认为,我们的研究为古代岩石草原植物群的生物地理历史和分布变化以及一般的山顶植被系统提供了新的见解。
更新日期:2021-01-24
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