| 项目编号: | 1539306
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| 项目名称: | EAGER: Metapopulation and metacommunity dynamics in a changing spatial and environmental mosaic - The importance of dispersal and gene flow |
| 作者: | Angela Strecker
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| 承担单位: | Portland State University
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| 批准年: | 2014
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| 开始日期: | 2015-06-15
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| 结束日期: | 2018-05-31
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| 资助金额: | USD197081
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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: | change
; dispersal
; study
; complex environmental mosaic
; landscape paleogenetic
; landscape genetics
; cutting-edge genetic technique
; water flow
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| 英文摘要: | Water development projects have transformed aquatic landscapes by changing vegetation, altering seasonality of wetlands, and increasing connectivity via canals. The ecological and evolutionary effects of these changes on aquatic plants and animals are poorly understood, but will likely become more common in the coming decades. This project will make use of 70-year records of the largest water development project in U.S. history to determine how changes in water flow and amount have altered the ecology and evolution of small aquatic animals. An exciting part of the study involves resurrecting these animals from eggs buried in mud for up to 70 years. Their genes will be compared to modern-day individuals to understand what changes have taken place and why those changes have occurred. Graduate and undergraduate students will be mentored, learning cutting-edge genetic techniques, experimental design, statistical analyses, and scientific writing. Results will be communicated to the public through outreach to public schools, collaboration with volunteer citizen scientists, a blog and a website.
Understanding the structure of spatial processes is a critical need in ecology. Dispersal is one such process and a primary mechanism by which species respond to a rapidly changing environment; it is also important in determining the structure of communities and functioning of ecosystems. However, understanding dispersal's role can be confounded by rapid adaptation of species, which is affected by the spatial structure of the environment and priority effects. The goal of this study is to measure ecological and evolutionary responses of invertebrate populations across a period of change in a complex environmental mosaic, using a new approach: landscape paleogenetics. Hypotheses will be tested using the Columbia Basin Project as an extraordinarily large experimental system. The study will exploit a unique feature of some invertebrates, prolonged dormancy, to trace population-level shifts over decades of changes in water distribution. A combination of landscape surveys, historical ecological data going back 70 years, DNA analysis, and landscape genetics will be employed. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94364
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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: | |
Angela Strecker. EAGER: Metapopulation and metacommunity dynamics in a changing spatial and environmental mosaic - The importance of dispersal and gene flow. 2014-01-01.
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