naa a22 4500 510748791 CHVBK 20180411083056.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11270-012-1361-8 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1361-8 Phosphorus Uptake and Release from Submerged Sediments in a Simulated Stream Channel Inundated with a Poultry Litter Source [Elektronische Daten] [Christopher Rogers, Andrew Sharpley, Brian Haggard, J. Scott] Northwest Arkansas, similar to many regions around the world, is home to intensive poultry production, which concentrates large amounts of nutrients in localized areas. Concerns over phosphorus (P) continue in these regions despite extensive conservation management efforts. Part of the concerns relates to the legacy effect of P in streams and the role of fluvial sediments in confounding land conservation measures. Sediment substrate was collected from five streams containing a variety of land uses in the Upper Illinois River Watershed (UIRW) to assess the buffering capacity of sediments on water column P. A purpose built fluvarium was used to determine sediment-P relationships during three flow phases: (I) baseflow (<0.005mg P L−1), (II) uptake-enriched (1.8mg P L−1), and (III) re-equilibration (<0.005mg P L−1) where water was circulated over the sediment for 48h at 0.001m3 s−1 (1L s−1). During each phase, flow was monitored and water sampled for determination of dissolved reactive P (DRP). In phase I, DRP reached equilibrium concentrations, which closely mimicked stream DRP at the time of sediment collection (R 2 = 0.77), and the highest concentration measured was 0.080mg P L−1 and the lowest 0.016mg P L−1. Sediments rapidly bound P (40% within 1h) during phase II. During phase II, 84 to 96% of added P was removed from solution. Of this bound P, 1 to 7% was released during phase III. Results indicate that fluvial sediments in the UIRW act as transient storage sites for P during high P events. Finally, streams that bound the most P during nutrient-rich flow released the least when returned to low P flow, indicating a greater ability to buffer P in streams. Springer Science+Business Media Dordrecht, 2012 Phosphorus nationallicence Streams nationallicence Nutrient management nationallicence Runoff nationallicence Rogers Christopher Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut Sharpley Andrew Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut Haggard Brian Biological and Agricultural Engineering Department, University of Arkansas Division of Agriculture, 203 Engineering Hall, Fayetteville, AR, USA aut Scott J. Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-9 0049-6979 224:1<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1361-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1361-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rogers Christopher Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut NATIONALLICENCE 700 1- Sharpley Andrew Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut NATIONALLICENCE 700 1- Haggard Brian Biological and Agricultural Engineering Department, University of Arkansas Division of Agriculture, 203 Engineering Hall, Fayetteville, AR, USA aut NATIONALLICENCE 700 1- Scott J. Department Crop, Soil, and Environmental Sciences, University of Arkansas Division of Agriculture, 115 Plant Sciences Building, Fayetteville, AR, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-9 0049-6979 224:1<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer