| 项目编号: | 1542387
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| 项目名称: | DIMENSIONS: COLLABORATIVE RESEARCH: The evolution of pollination syndrome diversity in Penstemon |
| 作者: | Mark Rausher
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| 承担单位: | Duke University
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| 批准年: | 2014
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| 开始日期: | 2015-08-15
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| 结束日期: | 2020-07-31
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| 资助金额: | USD999006
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| 资助来源: | US-NSF
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| 项目类别: | Continuing 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: | research
; penstemon
; bee pollination
; floral pollination strategy
; syndrome-specific speciation
; pollination diversity
; evolutionary equilibrium
; pollination syndrome diversity
; pollination strategy transition
; hummingbird pollination
; hummingbird pollination syndrome
; pollination syndrome transition
; pollination strategy diversification
; pollination strategy
; new pollination strategy
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| 英文摘要: | Ecosystem health and productivity depend on co-evolved species interactions. In terrestrial ecosystems a key interaction is between flowers and pollinators, and changes in the relative abundances of different pollinators (e.g., bees, birds) are thought to impose selective pressures that can shift floral pollination strategies and shape flowering plant communities. However, multiple forces may act to constrain the ability of a flowering plant lineage to evolve a new pollination strategy under changing environmental conditions. This research will model the rate of pollination strategy transitions in the largest flowering plant genus endemic to North America (Penstemon), and will determine both ecological and genetic processes that constrain and shape the rate of pollination strategy diversification. Understanding the forces that maintain diversity in pollination strategies informs food security and agricultural management issues.
The research integrates phylogenetic, ecological, and genetic approaches to understand the processes that determine pollination diversity. The research will test whether Penstemon has reached an evolutionary equilibrium in the relative frequencies of bee and hummingbird pollination syndromes. Additionally, the planned experiments will determine ecological and genetic processes responsible for asymmetries in pollination syndrome transitions, and in syndrome-specific speciation, and extinction rates. Field experiments will test whether interactions among floral traits constrain shifts from hummingbird to bee pollination. Genetic experiments will test whether loss-of-function mutations critical for shifts to hummingbird pollination also constrain reverse shifts from hummingbird to bee pollination. The integration of these experimental approaches will elucidate processes that determine pollination syndrome diversity in plant community assemblages. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93676
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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: | |
Mark Rausher. DIMENSIONS: COLLABORATIVE RESEARCH: The evolution of pollination syndrome diversity in Penstemon. 2014-01-01.
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