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. 2015 May 1;6:370. doi: 10.3389/fmicb.2015.00370

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Copyright © 2015 Stegen, Lin, Fredrickson and Konopka.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Regressions of ecological-process-influences against environmental features that were significant in both multiple regression and univariate regression models. (A) The relationship-within the Ringold formation-between the relative influence of variable selection and the vertical thickness of the oxidized portion of the Ringold formation, and (B) the relationship-within the Hanford formation-between the relative contribution of the undominated fraction and horizontal distance from the Columbia River. Solid lines indicate the ordinary least squares regression model, and the geological formation (Ringold or Hanford) and model statistics are provided on each panel.