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. 2012 Aug 6;3:274. doi: 10.3389/fmicb.2012.00274

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Copyright © 2012 Ruttenberg and Dyhrman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.

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Time-course incubation results initiated with waters collected during a relaxation event (stations CH-6 and CP-4) and incubated with nitrogen (+N), phosphate (+P), or no addition (control). Initial (day-1) values reflect in situ values, days-3 and -5 reflect concentrations or activities on subsequent days of the incubation. (A) Chl a concentrations; (B) Dissolved Inorganic Phosphorus (DIP) concentrations (data from (+P) treatments are not shown, see text); (C) Dissolved Organic Phosphorus (DOP) concentrations; and (D) Alkaline phosphatase activity (APA), APA was not assayed on day-3. Error bars represent the standard deviation of measurements from triplicate incubation bottles (where not shown, error bars were too small to resolve on the scale of the figure); replicates were not available for initial (day-1) samples. Asterisks (*) denote values significantly different from controls (p < 0.05).