, Volume 712, Issue 1, pp 61–70 | Cite as

Increasing synchrony of high temperature and low flow in western North American streams: double trouble for coldwater biota?

  • Ivan ArismendiEmail author
  • Mohammad Safeeq
  • Sherri L. Johnson
  • Jason B. Dunham
  • Roy Haggerty


Flow and temperature are strongly linked environmental factors driving ecosystem processes in streams. Stream temperature maxima (T max_w) and stream flow minima (Q min) can create periods of stress for aquatic organisms. In mountainous areas, such as western North America, recent shifts toward an earlier spring peak flow and decreases in low flow during summer/fall have been reported. We hypothesized that an earlier peak flow could be shifting the timing of low flow and leading to a decrease in the interval between T max_w and Q min. We also examined if years with extreme low Q min were associated with years of extreme high T max_w. We tested these hypotheses using long-term data from 22 minimally human-influenced streams for the period 1950–2010. We found trends toward a shorter time lag between T max_w and Q min over time and a strong negative association between their magnitudes. Our findings show that aquatic biota may be increasingly experiencing narrower time windows to recover or adapt between these extreme events of low flow and high temperature. This study highlights the importance of evaluating multiple environmental drivers to better gage the effects of the recent climate variability in freshwaters.


Climate change Freshwater ecosystems Hydrology Temperature Hydroclimatology 



Brooke Penaluna, Tim D. Mayer, two anonymous referees, and the associated editor provided comments on the manuscript. Financial support was provided by US Geological Survey, the US Forest Service Pacific Northwest Research Station and Oregon State University. Use of firm or trade names is for reader information only and does not imply endorsement of any product or service by the U.S. Government.

Supplementary material

10750_2012_1327_MOESM1_ESM.doc (9.6 mb)
Supplementary material 1 (DOC 9795 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • Ivan Arismendi
    • 1
    • 2
    Email author
  • Mohammad Safeeq
    • 2
  • Sherri L. Johnson
    • 3
  • Jason B. Dunham
    • 4
  • Roy Haggerty
    • 2
  1. 1.Department of Fisheries and WildlifeOregon State UniversityCorvallisUSA
  2. 2.College of Earth, Ocean, and Atmospheric SciencesOregon State UniversityCorvallisUSA
  3. 3.US Forest Service Pacific Northwest Research StationCorvallisUSA
  4. 4.US Geological SurveyForest and Rangeland Ecosystem Science CenterCorvallisUSA

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