Journal ArticleDOI
Relationship between stream temperature, thermal refugia and rainbow trout Oncorhynchus mykiss abundance in arid‐land streams in the northwestern United States
TLDR
In this paper, the role of cold thermal refugia created by upwelling groundwater in mediating this effect has been hypothesized but not quantitatively described; however, they did find that rainbow trout O. mykiss abundance within 12 northeast Oregon (USA) stream reaches was inversely correlated with mean ambient maximum stream temperatures (r=−0.7, P 22°C).Abstract:
– Warm stream temperatures may effectively limit the distribution and abundance of Pacific salmon Oncorhynchus spp. in streams. The role of cold thermal refugia created by upwelling groundwater in mediating this effect has been hypothesized but not quantitatively described. Between June 21 and September 15, 1994, rainbow trout O. mykiss abundance within 12 northeast Oregon (USA) stream reaches was inversely correlated with mean ambient maximum stream temperatures (r=−0.7, P 22°C) persisted from mid-June through August, and on average 10–40% of rainbow trout were observed within thermal refugia during periods of midday maximum stream temperatures. Frequency of cold-water patches within reaches was not significantly associated with rainbow trout density after accounting for the influence of ambient stream temperature (P=0.06; extra sum of squares F-test). Given prolonged high ambient stream temperatures in some reaches, the thermal refugia available in the streams we examined may be too small and too infrequent to sustain high densities of rainbow trout. However, these refugia could allow some rainbow trout to persist, although at low densities, in warm stream reaches.read more
Citations
More filters
Journal ArticleDOI
The thermal regime of rivers : a review
TL;DR: In this paper, different river thermal processes responsible for water temperature variability on both the temporal (e.g. diel, daily, seasonal) and spatial scales, as well as providing information related to different water temperature models currently found in the literature are reviewed.
Journal ArticleDOI
Global river discharge and water temperature under climate change
M.T.H. van Vliet,Wietse Franssen,J. R. Yearsley,Fulco Ludwig,Ingjerd Haddeland,Dennis P. Lettenmaier,Pavel Kabat,Pavel Kabat +7 more
TL;DR: In this paper, the authors assess the impact of climate change on global river flows and river water temperatures, and identify regions that might become more critical for freshwater ecosystems and water use sectors.
Journal ArticleDOI
Effects of climate change and wildfire on stream temperatures and salmonid thermal habitat in a mountain river network
Daniel J. Isaak,Charles H. Luce,Bruce E. Rieman,David E. Nagel,Erin E. Peterson,Dona L. Horan,Sharon Parkes,Gwynne L. Chandler +7 more
TL;DR: A warming climate has begun to affect thermal conditions in streams and that impacts to biota will be specific to both species and context, suggesting conservation actions should be guided based on considerations of restoration opportunity and future climatic effects.
Journal ArticleDOI
Measuring Groundwater–Stream Water Exchange: New Techniques for Installing Minipiezometers and Estimating Hydraulic Conductivity
TL;DR: In this article, the authors developed simple new techniques for installing minipiezometers and obtaining estimates of vertical hydraulic gradient, hydraulic conductivity, and specific discharge in gravel and cobble streambeds that allowed for large numbers of measurements to be obtained in remote locations.
Journal ArticleDOI
Buffered, lagged, or cooled? Disentangling hyporheic influences on temperature cycles in stream channels
Alicia S. Arrigoni,Alicia S. Arrigoni,Geoffrey C. Poole,Geoffrey C. Poole,Leal A. K. Mertes,S. J. O'Daniel,William W. Woessner,Steven A. Thomas +7 more
TL;DR: In this article, the Umatilla River's surface water temperature dynamics were investigated using a base flow water temperature monitor, and the authors found that hyporheic discharge locations typically had similar daily mean temperatures, but smaller diel ranges (compressed by 2 to 6°C) and desynchronized phases (offset by 0 to 6 h).
Related Papers (5)
An ecological perspective on in-stream temperature: natural heat dynamics and mechanisms of human-caused thermal degradation.
Geoffrey C. Poole,Cara H. Berman +1 more