Assessing the influence of lithology on the temporal-spatial variability of sediment transport and its relation to primary production in mountain streams

GSTDTAP

项目编号	1619700
	Assessing the influence of lithology on the temporal-spatial variability of sediment transport and its relation to primary production in mountain streams
	Catalina Segura
主持机构	Oregon State University
项目开始年	2016
	2016-07-01
项目结束日期	2019-06-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	151444(USD)
国家	美国
语种	英语
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.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69757
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	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.