| 项目编号: | 1457697
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| 项目名称: | Predation, Competition, and Establishment Dynamics within an Insular Adaptive Radiation |
| 作者: | Robert Pringle
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| 承担单位: | Princeton University
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| 批准年: | 2014
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| 开始日期: | 2015-05-01
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| 结束日期: | 2019-04-30
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| 资助金额: | USD882925
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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: | adaptive radiation
; predation
; competition
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| 英文摘要: | Adaptive radiation occurs when a single species invades a new environment (for example, an island) and subsequently diversifies into many species, each specialized to thrive in a particular segment of that new environment. Current understanding of adaptive radiation emphasizes the importance of resource scarcity and competition as the engine of diversification; in contrast, the role of predators in promoting or inhibiting such rapid bursts of evolution is largely unknown. This research will lead to better understanding of how competition and predation interact to (a) determine whether closely related species can coexist (a prerequisite for adaptive radiation), and (b) shape the subsequent evolutionary trajectories of those species. This experiment will improve science relevant to invasive-species management, which in in the national interest. This project also involves innovations in STEM education that will strengthen the scientific workforce.
Competition for limiting resources has long been thought to be the primary driver of adaptive radiation, and is the foundation for existing theory, but predation may play an equally important role in mediating species coexistence and diversification within adaptive radiations. This project focuses on the classic Anolis lizard adaptive radiation, using whole-ecosystem manipulations on 16 small Caribbean islands to assess how predation by curly-tailed lizards (Leiocephalus carinatus) affects competitive interactions between an established resident lizard species (Anolis sagrei) and experimentally introduced populations of a more arboreal lizard species (Anolis smaragdinus). Population trends, behavioral responses, diet composition, and genetic and morphological changes of all three lizard populations will be monitored. Molecular diet analysis (including isotopic analyses), radio-telemetry, and genomics (RAD-tag and RADseq sequencing) will be used to quantify variables, which will be tested for interaction and differences using standard and Bayesian statistical methods. Broader impacts include illumination of mechanisms underlying the success or failure of invading populations on islands, and the development of an undergraduate course combining interdisciplinary (including humanities) and field-based approaches. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94787
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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: | |
Robert Pringle. Predation, Competition, and Establishment Dynamics within an Insular Adaptive Radiation. 2014-01-01.
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