caa a22 4500 445891467 CHVBK 20180317145617.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10750-010-0462-x doi (NATIONALLICENCE)springer-10.1007/s10750-010-0462-x Nitrification and denitrification response to varying periods of desiccation and inundation in a western Kansas stream [Elektronische Daten] [Brad Austin, Eric Strauss] Changing environmental conditions and increased water consumption have transformed many historically perennial stream systems into intermittent systems. Multiple drying and wetting events throughout the year might impact many stream processes including nitrification and denitrification, key components of the nitrogen (N) cycle. During summer 2007, an experimental stream was used to dry and then rewet stream sediments to determine the effects of desiccation and rewetting of stream sediment on nitrification and denitrification potentials. Mean (±SE) nitrification and denitrification rates in sediment not dried (controls) were 0.431±0.017μg NO3 −-N/cm2/h and 0.016±0.002μg N2O-N/cm2/h, respectively. As sediment samples dried, nitrification rates decreased. Rates in sediments dried less than 7d recovered to levels equal or greater than those in the controls within 1d of being rewetted. Denitrification rates were not affected by 1d of drying, but samples dried greater than 1d experienced reduced rates of denitrification. Denitrification in sediments dried 7d or less recovered by day seven of being rewetted. Nitrification and denitrification processes failed to fully recover in sediments dried more than 7d. These results demonstrate that alterations in stream's hydrology can significantly affect N-cycle processes. Springer Science+Business Media B.V., 2010 Nitrification nationallicence Denitrification nationallicence Desiccation nationallicence Austin Brad Department of Biological Sciences, Fort Hays State University, 600 Park St., 67601, Hays, KS, USA aut Strauss Eric Department of Biology, River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut Hydrobiologia Springer Netherlands 658/1(2011-01-01), 183-195 0018-8158 658:1<183 2011 658 10750 https://doi.org/10.1007/s10750-010-0462-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0462-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Austin Brad Department of Biological Sciences, Fort Hays State University, 600 Park St., 67601, Hays, KS, USA aut NATIONALLICENCE 700 1- Strauss Eric Department of Biology, River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 658/1(2011-01-01), 183-195 0018-8158 658:1<183 2011 658 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer