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. 2019 Feb 19;10:248. doi: 10.3389/fmicb.2019.00248

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Copyright © 2019 Pitsch, Bruni, Forster, Qu, Sonntag, Stoeck and Posch.

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) and the copyright owner(s) 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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Environmental data and total ciliate abundance for Lake Zurich determined for the 5 m depth layer from March 2014 to 2017 (biweekly sampling, n = 74). (A) Water temperature (°C) and oxygen concentration (mg L^-1). (B) Total phosphorus (μg L^-1) and nitrate NO₃-N (μg L^-1) concentrations. (C) Total phytoplankton abundance (10⁶ cells L^-1) and total heterotrophic bacterial abundance (10⁹ bacteria L^-1). (D) Total ciliate abundance (10³ ciliates L^-1) determined by morphospecies counting of protargol impregnated specimens.