Significant nitrate attenuation in a mangrove-fringed estuary during a flood-chase experiment.

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ID: 16169
2019
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Ranked #124 of 145 articles by views in Environmental pollution (Barking, Essex : 1987)

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Abstract
Intertidal wetlands can sequester pollutants along estuarine conduits. Here we test the effectiveness of a mangrove-dominated estuary in removing dissolved nitrogen during a rain event. We intensively and simultaneously sampled surface water nutrients upstream and downstream of an estuary before, during and after a 63 mm rain event in Coffs Creek (Australia). NO was the main form of dissolved nitrogen upstream of the estuary (∼60%), while dissolved organic nitrogen (DON) was an important form at the downstream station (∼46%) during observations. High NO attenuation (71%) occurred during the rain event when the loads reached 31 μmol m catchment area day. In contrast, the estuary was found to be a source of NH (∼5 μmol m catchment area day). This implies a moderate conversion of upstream NO into NH and DON along the transport pathway, likely due to tidally-driven pore water exchange within the anoxic estuarine mangrove sediments. Overall, the mangrove-lined estuary attenuated upstream total dissolved nitrogen loads, maintaining water quality and minimizing exports to the coastal ocean even during high flow conditions.
Reference Key
wadnerkar2019significantenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wadnerkar, Praktan D;Santos, Isaac R;Looman, Arun;Sanders, Christian J;White, Shane;Tucker, James P;Holloway, Ceylena;
Journal Environmental pollution (Barking, Essex : 1987)
Year 2019
DOI
S0269-7491(19)31055-3
URL
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