| 项目编号: | 1456425
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| 项目名称: | Evolution of multiple competitors; experimental evolution using a natural protozoan community. |
| 作者: | Thomas Miller
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| 承担单位: | Florida State University
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| 批准年: | 2014
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| 开始日期: | 2015-04-15
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| 结束日期: | 2018-03-31
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| 资助金额: | USD582958
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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: | evolution
; species
; evolutionary pattern
; community
; pitcher plant
; complex community
; biological community
; 4-species community
; community ecology
; niche
; bacterial community
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| 英文摘要: | This study will test a long-standing concept in ecology that if two species utilize very similar resources, either one or both will evolve to use different resources, or one will be driven locally extinct. This concept is foundational to our understanding of how biological communities are organized. Using microbes found in the water-filled leaves of pitcher plants, this project will test this principle and its predictions about how species interactions evolve. A novel experimental approach will be used that compares the evolution of multiple species occurring in communities of increasing species diversity. Much of community ecology assumes that each species has its own ideal ecological role, called the niche, and that evolution can lead species to change their niche to limit resource competition from other species. Darwin's finches provide a good example, where these bird species evolved to be more different when together on islands, as compared to when they were alone. However, predictions about the evolution of the niche become more difficult in complex communities where many species may evolve at the same time. In addition to conducting greenhouse experiments involving pitcher plant microbial communities, the PIs will train undergraduate and graduate students as well as develop educational activities that target Florida science standards.
This work will address long-standing hypotheses that competition leads to niche partitioning and character displacement. The evolutionary patterns of protozoa species will be quantified in 1-, 2, and 4-species communities, using pitcher plants grown in the greenhouse. This design can be used to ask if species evolve differently in communities of increasing complexity. The theory of niche partitioning, which is thought to lead to coexistence, will be supported if species co-evolve to have reduced competitive interactions, while niche convergence would be supported if increased competitive interactions evolve in multispecies systems. Specific traits such as cell size and other physical characteristics associated with feeding in the protozoa will also be quantified. Next-generation DNA sequencing will be used to quantifying how the protozoa evolving in different combinations affect the underlying bacterial community. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94847
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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: | |
Thomas Miller. Evolution of multiple competitors; experimental evolution using a natural protozoan community.. 2014-01-01.
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