| 项目编号: | 1601533
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| 项目名称: | DISSERTATION RESEARCH: Phylogenomics and biogeography of Vochysia, unraveling its tempo and mode of evolution |
| 作者: | Robert Jansen
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| 承担单位: | University of Texas at Austin
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| 批准年: | 2016
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| 开始日期: | 2016-06-01
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| 结束日期: | 2018-05-31
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| 资助金额: | 20069
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Biological Sciences - Environmental Biology
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| 英文关键词: | vochysia
; mode
; vochysia diversification
; tempo
; modern biogeography
; niche modeling
; historical biogeography
; modern bayesian-based software
; evolutionary history
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| 英文摘要: | One of the most intriguing questions in modern biogeography relates to Neotropical plant diversity. The high number of species in this region was once thought to be due to the antiquity of rainforest habitats; however, recent studies suggest that many Neotropical flowering plant groups have been diversifying in the last 10-20 my. Recent episodes of plant diversification in the neotropics raise questions such as why have there been so many recent speciation events and what were the contributing biotic and abiotic factors. This study aims to investigate the biogeography and origin of Vochysia, a strictly Neotropical group that is hyper-diverse, widely distributed and relatively young. By contributing to a better understanding about the drivers of recent diversification in a group of plants, it will lead to an improvement in general conservation strategies since it will improve knowledge about species distribution and diversification. This research will be valuable for the academic progress of a graduate student and an undergraduate student that is gaining experience in bioinformatics, data analysis, laboratory, and herbarium protocols.
This project seeks to improve the knowledge of the historical biogeography of plants of the neotropics by investigating the tempo and mode of Vochysia diversification. A phylogenetic reconstruction of the group will be done using next generation sequencing and computational analytical tools to provide a phylogenetic tree for investigating the evolutionary history of Vochysia. The analysis of the mode of evolution will be done using software for phylogenetic tree dating calibration, biogeographical reconstruction, and niche modeling. Results from these analyses will allow inferences to be made about the relative importance of vicariance versus dispersal and niche conservatism versus divergence with an emphasis on endemic and rare species of Vochysia. The tempo of Vochysia diversification will involve comparing the net diversification rates within the genus and between sub-clades from different biomes using a modern Bayesian-based software that models the complex dynamics of species diversification. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92238
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Robert Jansen. DISSERTATION RESEARCH: Phylogenomics and biogeography of Vochysia, unraveling its tempo and mode of evolution. 2016-01-01.
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