Biogeochemistry 1

Session 27 (Contributed)
Wednesday, June 9, 8:00 AM-9:45 AM, IRC2
Moderator: B. Hall

8:00 (175) Spatio-temporal variation in benthic denitrification: does heterogeneity matter?
C.P. Arango, J.L. Tank, M.J. Bernot, and S.E. Inwood. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556

8:15 (176) Stream regulation of dissolved nitrogen losses from a forested headwater catchment.
J. Brookshire¹, H.M. Valett¹, S.A. Thomas², and J.R. Webster¹. ¹Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia, USA, 24061, ²Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA, 14853

8:30 (177) Nitrogen-sulfur coupling and denitrification in freshwater sediments .
A.J. Burgin¹, S.L. Whitmire², and S.K. Hamilton¹. ¹Kellogg Biological Station and Department of Zoology, Michigan State University, 3700 E. Gull Lake Drive, Hickory Corners, MI 49060, ²Department of Biology, West Virginia University, P.O. Box 6057 Morgantown, WV 26505

8:45 (178) Nitrate uptake by sediment under low nutrient concentrations in mountain lakes.
K.R. Nydick. Aquatic, Watershed, and Earth Resources Department, Utah State University, Logan, UT

9:00 (179) The influence of watershed land use on sediment denitrification rates the N₂O:N₂ ratio.
J.J. Beaulieu¹, J.L. Tank¹, S.K. Hamilton², R. Hall³, and M.J. Bernot¹. ¹Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, ²Department of Zoology, Michigan State University, Hickory Corners, MI 49060, ³Department of Zoology and Physiology, University of Wyoming, WY 82071

9:15 (180) Nitrate removal in the riparian zone of an ephemeral agricultural stream, southeast Queensland, Australia .
C.S. Fellows^1,2,3, D Rassam^2,3,4, N.J. Beard^1,2, R. DeHayr^2,3,4, H.M. Hunter^2,3,4, and P. Bloesch^3,4. ¹Centre for Riverine Landscapes, Griffith University, Nathan, Queensland, 4111, Australia, ²Cooperative Research Centre for Catchment Hydrology , ³Cooperative Research Centre for Coastal Zone, Estuary and Waterway Management, ⁴Natural Resources and Mines, Resources Sciences Centre, 80 Meiers Road, Indooroopilly, Queensland, 4068, Australia

9:30 (181) Regioinal, land use and substrate as controls on stream denitrification potential.
S. Findlay¹, M. Bernot², C.L. Crenshaw³, W.K. Dodds⁴, R.O. Hall⁵, S.K. Hamilton⁶, J. Potter⁷, D. Sobota⁸, J.L. Tank², H.M. Valett⁹, and J.R. Webster⁹. ¹Inst. of Ecosystem Studies, Millbrook, NY 12545, ²Dept. of Biological Sciences, Univ. of Notre Dame, Notre Dame, IN 46556, ³Biology Dept. U. of New Mexico, Albuquerque, NM 87131, ⁴Div. of Biology, Kansas State Univ. Manhattan, KS 66506, ⁵Dept. of Zoology and Physiology, Univ. of Wyoming, Laramie, WY 82071, ⁶Kellogg Biological Station, Mich. State Univ. Hickory Corners, MI 49060, ⁷Natural Resources, Univ. of New Hampshire, Durham, NH 03824, ⁸Dept. of Fisheries and Wildlife, Oregon State Univ. Corvallis, OR 97331, ⁹Dept. of Biology, VPISU, Blacksburg, VA 24061