| 项目编号: | 1619700
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| 项目名称: | Assessing the influence of lithology on the temporal-spatial variability of sediment transport and its relation to primary production in mountain streams |
| 作者: | Catalina Segura
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| 承担单位: | Oregon State University
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| 批准年: | 2016
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| 开始日期: | 2016-07-01
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| 结束日期: | 2019-06-30
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| 资助金额: | 287119
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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: | Geosciences - Earth Sciences
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| 英文关键词: | primary production
; sediment transport
; stream
; low production level
; stream ecology
; bedrock lithology
; different lithology
; spatial variability
; gravel-bedded stream
; headwater stream
; control
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| 英文摘要: | Primary production provides the fundamental source of energy for most life on earth, and therefore understanding what controls primary production is key to understanding ecosystems. In streams, relevant research has focused mainly on the influence of light and nutrients. The role of underlying geology and sediment transport has not been as well explored. The algae that dominate primary producers in headwater streams live on rocks. Flow events that mobilize those rocks can scrape algae away and reset the system to low production levels. Understanding controls on the frequency of sediment scour and abrasion in a stream is therefore fundamental to understanding the dynamics of primary production. This research project will contribute to a better understanding of the coevolution of ecosystems and landscapes.
This interdisciplinary research project links fluvial geomorphology and stream ecology. The goal is to determine: (a) how spatial variability in velocity and shear stress affect sediment transport in gravel-bedded streams, (b) how these affect primary productivity at reach and patch scale, and (c) what control underlying bedrock lithology exerts on these processes. This project will couple the use of a 2D model and the collection of field measurements in four sites in the Oregon Coast Range. The sites have been selected based on similar climate, light, nutrients, and temperature, but different lithology to isolate the controls it exerts. The project is led by an early career Hispanic female investigator. Collaboration with a local high school will provide a research experience for teachers and involve Native American high school students. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91805
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Catalina Segura. Assessing the influence of lithology on the temporal-spatial variability of sediment transport and its relation to primary production in mountain streams. 2016-01-01.
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