Skip to Main Content
Fluid temperatures: Modeling the thermal regime of a river networkAuthor(s): Rhonda Mazza; Ashley Steel
Source: Science Findings 201. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p.
Publication Series: Science Findings
Station: Pacific Northwest Research Station
PDF: Download Publication (5.0 MB)
DescriptionWater temperature drives the complex food web of a river network. Aquatic organisms hatch, feed, and reproduce in thermal niches within the tributaries and mainstem that comprise the river network. Changes in water temperature can synchronize or asynchronize the timing of their life stages throughout the year. The water temperature fluctuates over time and place, creating variability in the network’s thermal regime. Because of this variability, many important details in the thermal regime of a river network cannot be simply represented by an average temperature.
New research by Ashley Steel, a quantitative ecologist and statistician with the Pacific Northwest Research Station, and her colleagues documented the variability of water temperature over time and place on the Snoqualmie River network in Washington. They found clear spatial patterns in temperature metrics, and these patterns shifted over time. They demonstrated that it is possible to model key facets of the thermal landscape that are tied to the places and times in which coho and steelhead salmon are at critical life stages.
Their findings provide a basis for more precisely focused habitat restoration efforts. This fundamental information can be used to develop tools that help identify where to take action to mitigate the effects of warmer air temperatures and of changes in winter precipitation on salmon and other species of concern.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMazza, Rhonda; Steel, Ashley. 2017. Fluid temperatures: Modeling the thermal regime of a river network. Science Findings 201. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p.
Keywordswater temperature, air temperature, network, modeling, Snoqualime, Heen Latinee
- River food webs: Incorporating nature’s invisible fabric into river management
- Shading out climate change: Planting streamside forests to keep salmon cool
- Climate change, fish, and aquatic habitat in the Blue Mountains [Chapter 5]
XML: View XML