Show simple item record Roley, S.S. Tank, J.L. Stephen, M.L. Johnson, L.T. Beaulieu, J.J. Witter, J.D. 2014-11-12T20:19:33Z 2014-11-12T20:19:33Z 2012
dc.identifier.citation Roley, S. S., Tank, J. L., Stephen, M. L., Johnson, L. T., Beaulieu, J. J., & Witter, J. D. (2012). Floodplain restoration enhances denitrification and reach-scale nitrogen removal in an agricultural stream. Ecological Applications, 22(1), 281-297. en
dc.description.abstract Streams of the agricultural Midwest, USA, export large quantities of nitrogen, which impairs downstream water quality, most notably in the Gulf of Mexico. The two-stage ditch is a novel restoration practice, in which floodplains are constructed alongside channelized ditches. During high flows, water flows across the floodplains, increasing benthic surface area and stream water residence time, as well as the potential for nitrogen removal via denitrification. To determine two-stage ditch nitrogen removal efficacy, we measured denitrification rates in the channel and on the floodplains of a two-stage ditch in north-central Indiana for one year before and two years after restoration. We found that instream rates were similar before and after the restoration, and they were influenced by surface water $\text{NO}_{3}^{−}$ concentration and sediment organic matter content. Denitrification rates were lower on the constructed floodplains and were predicted by soil exchangeable $\text{NO}_{3}^{−}$ concentration. Using storm flow simulations, we found that two-stage ditch restoration contributed significantly to $\text{NO}_{3}^{−}$ removal during storm events, but because of the high $\text{NO}_{3}^{−}$ loads at our study site, <10% of the $\text{NO}_{3}^{−}$ load was removed under all storm flow scenarios. The highest percentage of $\text{NO}_{3}^{−}$ removal occurred at the lowest loads; therefore, the two-stage ditch's effectiveness at reducing downstream N loading will be maximized when the practice is coupled with efforts to reduce N inputs from adjacent fields. en
dc.language.iso en_US en
dc.publisher The Ecological Society of America en
dc.relation.isversionof en
dc.rights © 2012 The Ecological Society of America. en
dc.subject Agriculture en
dc.subject Denitrification en
dc.subject Floodplain en
dc.subject Stream restoration en
dc.subject Tippecanoe River north-central Indiana USA en
dc.subject Two-stage ditch en
dc.subject nitrogen en
dc.subject ammonia en
dc.subject residence time en
dc.subject restoration ecology en
dc.subject surface area en
dc.subject suspended load en
dc.subject water flow en
dc.subject water quality en
dc.subject chemistry en
dc.subject ecosystem en
dc.subject environmental monitoring en
dc.subject flooding en
dc.subject methodology en
dc.subject river en
dc.subject sediment en
dc.subject water pollutant en
dc.subject Geologic Sediments en
dc.subject Water Pollutants, Chemical en
dc.subject Indiana en
dc.subject Mexico [North America] en
dc.subject Midwest en
dc.subject United States en
dc.subject nitrogen, 7727-37-9 en
dc.subject Nitrogen, 7727-37-9 en
dc.title Floodplain restoration enhances denitrification and reach-scale nitrogen removal in an agricultural stream en
dc.type Article en
dc.altmetrics.display true en

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