| 项目编号: | 1701645
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| 项目名称: | DISSERTATION RESEARCH: Fossils, fruits, and phylogeny: an integrative approach to understanding the historical biogeography of palms over the last 100 million years |
| 作者: | Selena Smith
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| 承担单位: | University of Michigan Ann Arbor
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| 批准年: | 2017
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| 开始日期: | 2017-05-01
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| 结束日期: | 2019-04-30
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| 资助金额: | 20150
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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: | palm
; research
; year
; historical biogeography
; palms
; time-calibrated phylogeny
; comprehensive fossil record database
; palm fossil record
; widespread fossil record
; palm family
; palm evolution
; fossil palm diversity
; fossil record
; fossil fruit
|
| 英文摘要: | Palms are found abundantly throughout tropical regions worldwide and have important roles in ecosystems and the global economy. Palms are an interesting group of plants from both an evolutionary and environmental perspective. They have a long evolutionary history stretching back at least 90 million years, evidenced by a rich and widespread fossil record, and are useful indicators of past environmental conditions due to the narrow climatic range within which most can survive. By using the fossil record to inform the evolutionary history of palms, this research seeks to understand their geographical range, and how they have responded to changing environments throughout their history. This research will test current hypotheses on palm evolution, and generate publicly available databases of living and fossil palm diversity. One graduate student will be trained in diverse systematics methods, and datasets generated by this research will also be used to train undergraduates from underrepresented groups. Materials from the research will also be used to develop interactive exhibits for teaching about plant structure, diversity, and evolution to the public.
This project investigates the historical biogeography of the palm family by incorporating empirical data from the geologic record into phylogenetic and model-based biogeographic analyses. It will test current hypotheses of a Laurasian origin of the crown node of Arecaceae and of the biogeographic origins of the major subfamilies. This work will also investigate the role of shifting continental geography in the radiation of palms, and how climatic changes correlate with shifts in dispersal and extinction rates over the last 100 million years. A comprehensive database of the palm fossil record will be compiled and the data incorporated into a dispersal-extinction-cladogenesis (DEC) model to infer historical ranges of taxa, and a dispersal-extinction-sampling model to compute dispersal and extinction rates over time, which can be correlated with climate data. Fossil fruits with sufficient characters for inclusion in a phylogenetic analysis will be studied using X-ray micro-computed tomography, and will be used to generate a time-calibrated phylogeny for use in the DEC analysis. Outcomes include a comprehensive fossil record database for palms, 3D morphological data on living palms, a tribe-level chronogram for the family, and new insights into the historical biogeography of this important group of plants. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/90280
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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: | |
Selena Smith. DISSERTATION RESEARCH: Fossils, fruits, and phylogeny: an integrative approach to understanding the historical biogeography of palms over the last 100 million years. 2017-01-01.
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