| 项目编号: | 1501474
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| 项目名称: | DISSERTATION RESEARCH: Inferring the Evolutionary History of Arthropods Associated with Pitcher Plants using Phylogeographic Concordance Factors. |
| 作者: | Bryan Carstens
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| 承担单位: | Ohio State University
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| 批准年: | 2014
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| 开始日期: | 2015-06-01
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| 结束日期: | 2016-11-30
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| 资助金额: | USD20020
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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
; ecological community
; phylogeographic concordance factor
; research
; shared evolutionary history
; community
; sarracenia alata carnivorous pitcher plant system
; concordance tree
; evolutionary biology
; complex evolutionary history
; evolutionary process
; evolutionary time scale
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| 英文摘要: | Interactions among species are driving forces behind the formation, structure and existence of ecological communities. In these communities, species interact with one another, compete for resources, and ultimately shape the existence and distribution of biodiversity on Earth. A central question of evolutionary biology is how these ecological communities came to be, and how long these interactions have persisted. This research will provide a new tool for understanding if ecological communities have persisted over evolutionary time scales, and to what extent the co-occurring species show similar patterns in their genetic diversity. If ecological communities exhibit strong patterns of a shared evolutionary history, the extinction of a single member may be dire for other ecologically associated species. Understanding these attributes will provide insight into how species responded to the dynamic landscape and climatic changes during the Pleistocene ice ages, and will help conservation managers identify regions in need of protection.
This research aims to develop phylogeographic concordance factors, a novel statistical approach testing for co-diversification in an ecological community. This synthesis will identify common diversification patterns across species as well as species that do not conform to these patterns. Phylogeographic concordance factors take in species tree distributions from multiple co-occurring species, and identify patterns shared among the clades. These clades are then used to construct a concordance tree, providing a phylogeny with support values that best represents diversification patterns of the community. Importantly, this method will identify species that are outliers of a dominant pattern. Along with developing the method as a package for the statistical platform R, this approach will be demonstrated in the Sarracenia alata carnivorous pitcher plant system. This system is located in the topographically and geologically complex region of the southeastern United States, where a number of previous studies have documented emergent biogeographic patterns. Mitochondrial data from five arthropods from this community indicate that genetic variation has been structured in a similar way to the host plant, but preliminary sequence data generated from the nuclear genome implies a more complex evolutionary history for this system, making the system ideal for studies using phylogeographic concordance factors. This new tool will enhance the ability of researchers to identify shared patterns of diversification, and the evolutionary processes that have influenced biodiversity. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94501
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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: | |
Bryan Carstens. DISSERTATION RESEARCH: Inferring the Evolutionary History of Arthropods Associated with Pitcher Plants using Phylogeographic Concordance Factors.. 2014-01-01.
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