中国西南山地高黎贡山生物物种特有性的演化格局与机制

	中国西南山地高黎贡山生物物种特有性的演化格局与机制; Evolutionary pattern and mechanism of biological endemic species of Gaoligong mountain in Mountains of southwest China
	叶俊伟
摘要	Mountains are unique ecosystems that harbor extreme high level of biodiversity, which is formed through complicated historical geological-climatic events and contemporary topographic-climatic conditions, while the concentration of narrowly distributed species makes it centers of endemism. Mountains of Southwest China (MSC) is one of the world 34 biodiversity hotspots, diverse geological-climatic events and heterogeneous topographic-climatic conditions make it ideal for investigation of formation and evolution of biodiversity. However, previous researches are mainly case studies, comprehensive study for flora/fauna is lacking. Thus, we focus on Gaoligong Mountain (GLGS), which have the highest level of biodiversity and endemism in MSC. To explore the relationship of endemism and mountain uplift, monsoon evolution and Pleistocene climatic changes, spatial evolution of endemism and mechanism of speciation, the phylogeny of family/genus that the endemic species (plants, animal and fungi) belongs to were first constructed, and then divergence times were estimated and ancestral distributions were reconstructed, principle component analysis (PCA) was last conducted. Based on the criterion that the phylogeny of endemic species and its sister/closely-related species is well resolved, we chose 112 endemic species, which is composed mainly of plant species (n=73, including 71 angiosperm, one gymnosperm and one fern species), and then 33 animal species, which is mainly fish (n=22) and frog (n=10) species, and six fungi species. We directed adopted the results of taxa that phylogeny was reconstructed and divergence time was estimated. For the remaining taxa that phylogeny was not reconstructed or divergence time was not estimated, we firstly obtain sequence information of endemic species and species of the family/genus according to public database or complete chloroplast genome through genome skimming. Then Bayesian phylogeny was reconstructed using BEAST software and then divergence times were calibrated using multiple fossils or secondary calibrations. The origin time of endemic species were collected using the divergence time of endemic species and its sister species (stem age). Based on the phylogeny of endemic species and its sister species (at least two or more ancestral nodes of endemic species were included), we reconstructed their ancestral distributions. Whether the spatial mode of endemic species belongs to “centric origin” or “eccentric origin” based on ancestral distribution reconstructions. In order to explore the relative contribution of niche conservation and adaptive evolution to the speciation of endemic species, we selected 55 plant species and their sister species/lineages for principal component analysis, factors include dispersal capacity, flowering phase, environment, geographical distance and altitude. Temporally, the origin time of endemic species spans from 0.01 Ma to 17.76 Ma, among which 95 species are younger than 8 Ma (85%) and
	2021-09
文献类型	学位论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74638
专题	昆明植物所硕博研究生毕业学位论文
推荐引用方式 GB/T 7714	叶俊伟. 中国西南山地高黎贡山生物物种特有性的演化格局与机制, Evolutionary pattern and mechanism of biological endemic species of Gaoligong mountain in Mountains of southwest China[D],2021.

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叶俊伟-1. 昆明植物所博士后研究报告—（2441KB）	学位论文		限制开放	CC BY-NC-SA	请求全文