16 research outputs found

    Changes in sediment nutrient fluxes due to increasing duration of hypoxia.

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    <p>The graphs show the average flux (± SE, N = 4) of (A) O<sub>2</sub> (B) Si (C) NH<sub>4</sub><sup>+</sup> (D) NO<sub>3</sub><sup>−</sup> + NO<sub>2</sub><sup>−</sup>, (E) PO<sub>4</sub><sup>3−</sup> and (F) Fe<sup>2+</sup> for each treatment.</p

    Analysis of similarities (ANOSIM) comparing benthic community abundance, biomass and trait composition between treatments (0, 3, 7 and 48 days of hypoxia).

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    <p>Analysis of similarities (ANOSIM) comparing benthic community abundance, biomass and trait composition between treatments (0, 3, 7 and 48 days of hypoxia).</p

    The effects of hypoxic stress on the behavior of <i>Macoma balthica</i>.

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    <p>(A) Number of stressed and/or dead <i>M. balthica</i> on the sediment surface with increasing duration of hypoxia. A nonlinear regression curve was fitted to the replicate values (r<sup>2 = </sup>0.92, p<0.0001, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0044920#pone.0044920.s005" target="_blank">Table S2</a>). The dotted horizontal line represents the number of <i>M. balthica</i> found at depth in undisturbed sediments. (B) The reburial rate of <i>M. balthica</i> after 0, 3 and 7 days of hypoxia. 20 bivalves were included for each treatment (tested in the laboratory). The x-axes are log (x + 1) transformed.</p

    The effect of increasing duration of hypoxia on benthic parameters.

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    <p>(A) abundance (B) biomass (C) number of species (D) total number of trait modalities present (filled squares, primary y-axis, r<sup>2 = </sup>0.93, p<0.001) and the average number of species within trait modalities (white circles, secondary y-axis, r<sup>2 = </sup>0.86, p<0.001) and (E) the community bioturbation potential (BP<sub>c</sub>). <i>Mya arenaria</i> is excluded from the biomass data. Non-linear regression curves were fitted to the plotted data (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0044920#pone.0044920.s005" target="_blank">Table S2</a>). For presentation, the x-axes are log (x + 1) transformed.</p

    Proportional effects of sediment chemical and spatial factors as well as other properties of the sampling sites on the variation in bacterial communities in organic-rich brackish sediments.

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    <p>Chemical parameters included those used in CAP (refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067061#pone-0067061-g003" target="_blank">Figure 3</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067061#pone.0067061.s007" target="_blank">Dataset S2</a>). Spatial parameters included geographic coordinates and sediment depth, and other properties of the sampling sites consisted of sediment accumulation rate (SAR) and water depth (refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067061#pone.0067061.s004" target="_blank">Table S1</a>).</p
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