![]() ![]() The Everglades Agricultural Area (EAA) sits upstream from the Florida Everglades, a traditionally P limited environment. Phosphorus (P) from non-point sources such as agriculture increase eutrophication, potentially causing algal blooms, fish kills, and subsequent environmental and economic harm. This does not alter our adherence to PLOS ONE policies on sharing data and materials. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: Wedgworth Farm and TRU-FLOW Corporation provided the land and hydraulic pumps for the study. Wedgworth Farm and TRU-FLOW Corporation provided the land and hydraulic pumps for the study. Environmental Protection Agency - Florida Department of Environmental Protection for the Nonpoint Source Management Program (319H), agreement number G0434 to JHB. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: All relevant data are within the paper and its Supporting Information files.įunding: This study was funded by the U.S. Received: DecemAccepted: DecemPublished: January 13, 2020Ĭopyright: © 2020 Capasso et al. PLoS ONE 15(1):Įditor: Hongbo Zhao, Central South University, CHINA (2020) Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments. The presence of inorganic limerock could have affected results due to increased P adsorption capacity and larger average particle size compared to the organic fraction of the sediment.Ĭitation: Capasso J, Bhadha JH, Bacon A, Vardanyan L, Khatiwada R, Pachon J, et al. Overall, there was an average trend of coarser particle size and lower P concentrations in the inflow compared to the outflow. Median (p = 0.10) particle size was not significantly correlated to TP. Presence of flow and aquatic vegetation did not have a significant impact on particle size, TP, or labile P fractions. Larger average particle size and lower average total P concentrations were found in the inflows of the field ditches compared to the outflows. Fractions of P were determined using a sequential fractionation experiment and 31P Nuclear Magnetic Resonance (NMR) Spectroscopy. Sediments were tested for pH, TP, and organic matter. Particle size was determined using a LS 13 320 Laser Diffraction Particle Size Analyzer. Sediments with finer particle size (>0.002 mm) were hypothesized to contain greater total P (TP) and less labile P than sediments with coarser particle size. This study investigated how flow facilitated by hydraulic pumps and aquatic vegetation species water lettuce ( Pistia stratiotes) and water hyacinth ( Eichhornia crassipes) affected particle size and P-dynamics in organic sediments in agricultural drainage ditches. Particle size is one factor affecting phosphorus (P) dynamics in soils and sediments. ![]()
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