| 项目编号: | 1501187
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| 项目名称: | DISSERTATION RESEARCH: Phylogeny of the Liolaemus montanus group and high resolution species delimitation in the L. robustus clade (Squamata, Liolaemidae). |
| 作者: | Jack Sites
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| 承担单位: | Brigham Young University
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| 批准年: | 2014
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| 开始日期: | 2015-05-01
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| 结束日期: | 2017-04-30
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| 资助金额: | USD16362
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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: | species
; lizard
; new species
; liolaemus
; plant group
; poorly-known liolaemus montanus clade
; particular clade
; alternative species hypothesis
; project
; poorly-known group
; major subgroup
; complete phylogeny
; species boundary
; species delimitation method
; target group
; liolaemus robustus species group
; species group
; endemic species
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| 英文摘要: | The tropical Andes provide a natural laboratory for biodiversity studies for many animal and plant groups, yet many of the endemic species are restricted to remote high-elevation areas that are poorly studied. One of these poorly-known groups is the lizard genus Liolaemus, and this project will use DNA sequences to: 1) propose a hypothesis of evolutionary relationships for one major subgroup of this genus (thought to contain ~ 45 species); and 2) evaluate alternative methods of delimiting species in a smaller species group of Liolaemus. For both objectives we will sample new geographic locations, and for the first time employ 'Next Generation' DNA sequencing technologies to collect large molecular data sets for the target groups, and newer statistical methods for resolving species boundaries based on multiple independent classes of data (morphology, ecology, DNA, etc.). These lizards will serve as model organisms for other biodiversity studies, and stimulate further field sampling and integrative taxonomic studies of the tropical Andean biota. Our study will reveal cryptic diversity, promote the discovery of the new species, and provide a better understanding of the region?s biodiversity. The description of new species will involve undergraduate student co-authors, while reconstruction of evolutionary relationships will serve as a framework for comparative studies of the evolution of viviparity in these lizards, and how they have colonized the harshest high-elevation Andean climates.
This project will generate new data via development of a large Single Nucleotide Polymorphism (SNP) dataset, and employ new non-tree based species delimitation methods (SDL) to test alternative species hypotheses in the lizards of the Liolaemus robustus species group. This research will test SDL hypotheses based on mitochondrial (mt) DNA, morphological, and bioclimatic data. The project will test these alternatives with SNP data using a new Bayes factor SDL approach that does not require a guide tree, and compares across non-nested alternative models. This study will provide new knowledge about the evolutionary history of this particular clade of lizards, and test the utility of this approach in a poorly-known but biodiversity-rich part of South America. We will also develop the most complete phylogeny for the poorly-known Liolaemus montanus clade, based on the most extensive sampling of species and characters available to date. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94757
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Jack Sites. DISSERTATION RESEARCH: Phylogeny of the Liolaemus montanus group and high resolution species delimitation in the L. robustus clade (Squamata, Liolaemidae).. 2014-01-01.
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