| 项目编号: | 1547679
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| 项目名称: | EAGER: Pathways to ecological generalism and the abundance-occupancy relationship in small-mammal communities |
| 作者: | Jacob Goheen
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| 承担单位: | University of Wyoming
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| 批准年: | 2014
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| 开始日期: | 2015-07-15
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| 结束日期: | 2017-06-30
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| 资助金额: | USD199461
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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: | project
; ecological generalism
; individual
; large-scale community
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| 英文摘要: | Understanding how small-scale experiments explain widespread patterns is a major challenge in the field of ecology. While experiments reveal mechanisms, their value is uncertain if these mechanisms cannot account for the large-scale patterns that characterize the natural world. One such common pattern is that widespread species tend to be abundant, while species with restricted distributions are often rare. This project, from an early career investigator, pursues a novel approach to determine how resource use by individuals can explain this pattern. The project will integrate experimental data collected on individuals with new models to extend individual results to populations and then to communities across large landscapes. The research will engage undergraduate students from Wyoming, who will participate in research along with Kenyan students, and leverages current NSF support by using an ongoing experiment in Kenya. Results will contribute to a reference library of savanna plants at the Smithsonian Institution that is shared with museums in Kenya. Data from this project will be publicly available.
Correlations between abundance and occupancy are among the most pervasive in ecology: species with expansive distributions tend to be locally abundant, whereas those with restricted distributions tend to be locally rare. This pattern has long captivated ecologists, but proposed hypotheses to explain it have proved very difficult to test. This project pursues the resource-breadth hypotheses by focusing specifically on dietary breadth of individuals. Resource use will be quantified by sequencing fecal DNA in a species-rich guild of small, herbivorous mammals. Individual consumer-resource interactions will be integrated with estimates of fitness and population growth for constituent species in large-scale communities to discern whether ecological generalists are more abundant where they co-occur with dietary specialists and to identify the pathways through which ecological generalism is manifested in survival and recruitment rates. An ongoing herbivore exclusion experiment provides a backdrop of shifting resource dynamics across which a guild of small mammals is intensively monitored, and thus an excellent opportunity to test the resource-breath hypothesis. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93999
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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: | |
Jacob Goheen. EAGER: Pathways to ecological generalism and the abundance-occupancy relationship in small-mammal communities. 2014-01-01.
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