H
H. Maurice Valett
Researcher at University of Montana
Publications - 72
Citations - 10664
H. Maurice Valett is an academic researcher from University of Montana. The author has contributed to research in topics: Hyporheic zone & Surface water. The author has an hindex of 38, co-authored 67 publications receiving 9938 citations. Previous affiliations of H. Maurice Valett include Arizona State University & Virginia Tech.
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Journal ArticleDOI
Control of nitrogen export from watersheds by headwater streams
Bruce J. Peterson,Wilfred M. Wollheim,Patrick J. Mulholland,Jackson R. Webster,Judy L. Meyer,Jennifer L. Tank,Eugènia Martí,William B. Bowden,H. Maurice Valett,Anne E. Hershey,William H. McDowell,Walter K. Dodds,Stephen K. Hamilton,Stanley V. Gregory,Donna D'angelo Morrall +14 more
TL;DR: A comparative 15N-tracer study of nitrogen dynamics in headwater streams from biomes throughout North America demonstrates that streams exert control over nutrient exports to rivers, lakes, and estuaries.
Journal ArticleDOI
Stream denitrification across biomes and its response to anthropogenic nitrate loading
Patrick J. Mulholland,Patrick J. Mulholland,Ashley M. Helton,Geoffrey C. Poole,Robert O. Hall,Stephen K. Hamilton,Bruce J. Peterson,Jennifer L. Tank,Linda R. Ashkenas,Lee W. Cooper,Clifford N. Dahm,Walter K. Dodds,Stuart E. G. Findlay,Stanley V. Gregory,Nancy B. Grimm,Sherri L. Johnson,William H. McDowell,Judy L. Meyer,H. Maurice Valett,Jackson R. Webster,Clay P. Arango,Jake J. Beaulieu,Jake J. Beaulieu,Melody J. Bernot,Amy J. Burgin,Chelsea L. Crenshaw,Laura T. Johnson,B. R. Niederlehner,Jonathan M. O'Brien,Jody D. Potter,Richard W. Sheibley,Richard W. Sheibley,Daniel J. Sobota,Daniel J. Sobota,Suzanne M. Thomas +34 more
TL;DR: It is demonstrated that excess nitrate in streams elicits a disproportionate increase in the fraction of nitrate that is exported to receiving waters and reduces the relative role of small versus large streams as nitrate sinks.
Journal ArticleDOI
The functional significance of the hyporheic zone in streams and rivers
TL;DR: The hyporheic corridor concept describes gradients at the catchment scale, extending to alluvial aquifers kilometers from the main channel as discussed by the authors, which is an active ecotone between the surface stream and groundwater.
Journal ArticleDOI
Nitrous oxide emission from denitrification in stream and river networks
Jake J. Beaulieu,Jennifer L. Tank,Stephen K. Hamilton,Wilfred M. Wollheim,Robert O. Hall,Patrick J. Mulholland,Patrick J. Mulholland,Bruce J. Peterson,Linda R. Ashkenas,Lee W. Cooper,Clifford N. Dahm,Walter K. Dodds,Nancy B. Grimm,Sherri L. Johnson,William H. McDowell,Geoffrey C. Poole,H. Maurice Valett,Clay P. Arango,Melody J. Bernot,Amy J. Burgin,Chelsea L. Crenshaw,Ashley M. Helton,Laura T. Johnson,Jonathan M. O'Brien,Jody D. Potter,Richard W. Sheibley,Richard W. Sheibley,Daniel J. Sobota,Suzanne M. Thomas +28 more
TL;DR: It is found that stream denitrification produces N2O at rates that increase with stream water nitrate (NO3−) concentrations, but that <1% of denitrified N is converted to N1O, and it is suggested that increased stream NO3− loading stimulatesDenitrification and concomitant N2o production, but does not increase the N2 O yield.
Journal ArticleDOI
Parent lithology, surface-groundwater exchange, and nitrate retention in headwater streams
TL;DR: In this paper, the authors address the ecological ramifications of variation in hydrologic interaction between streams and alluvial aquifers in catchments with alluvium derived from parent materials of contrasting geologic composition.