Effects of warming and nutrients on the microbial food web in shallow lake mesocosms

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Priit Zingel, Estonian Univ Life Sci, Estonian University of Life Sciences, Inst Agr & Environm Sci, Ctr Limnol
  • ,
  • Fabien Cremona, Estonian Univ Life Sci, Estonian University of Life Sciences, Inst Agr & Environm Sci, Ctr Limnol
  • ,
  • Tiina Noges, Estonian Univ Life Sci, Estonian University of Life Sciences, Inst Agr & Environm Sci, Ctr Limnol
  • ,
  • Yu Cao
  • ,
  • Erika M. Neif, Univ Estadual Maringa, Universidade Estadual de Maringa, Programa Posgrad Ecol Ambientes Aquat Continentai, Dept Biol, Nucleo Pesquisas Limnol Ictiol & Aquicultura Nupe
  • ,
  • Jan Coppens, Middle East Tech Univ, Middle East Technical University, Dept Biol, Limnol Lab
  • ,
  • Ugur Iskin, Middle East Tech Univ, Middle East Technical University, Dept Biol, Limnol Lab
  • ,
  • Torben L. Lauridsen
  • Thomas A. Davidson
  • Martin Sondergaard
  • Meryem Beklioglu, Middle East Tech Univ, Middle East Technical University, Dept Biol, Limnol Lab
  • ,
  • Erik Jeppesen

We analysed changes in the abundance, biomass and cell size of the microbial food web community (bacteria, heterotrophic nanoflagellates, ciliates) at contrasting nutrient concentrations and temperatures during a simulated heat wave. We used 24 mesocosms mimicking shallow lakes in which two nutrient levels (unenriched and enriched by adding nitrogen and phosphorus) and three different temperature scenarios (ambient, IPCC A2 scenario and A2+%50) are simulated (4 replicates of each). Experiments using the mesocosms have been running un-interrupted since 2003. A 1-month heat wave was imitated by an extra 5 degrees C increase in the previously heated mesocosms (from 1st July to 1st August 2014). Changes in water temperature induced within a few days a strong effect on the microbial food web functioning, demonstrating a quick response of microbial communities to the changes in environment, due to their short generation times. Warming and nutrients showed synergistic effects. Microbial assemblages of heterotrophic nanoflagellates and ciliates responded positively to the heating, the increase being largest in the enriched mesocosms. The results indicate that warming and nutrients in combination can set off complex interactions in the microbial food web functioning. (C) 2018 Elsevier GmbH. All rights reserved.

Original languageEnglish
JournalEuropean Journal of Protistology
Volume64
Pages (from-to)1-12
Number of pages12
ISSN0932-4739
DOIs
Publication statusPublished - Jun 2018

    Research areas

  • Bacteria, Ciliates, Global warming, Heterotrophic flagellates, Nutrients, EUTROPHIC LAKE, CLIMATE-CHANGE, SEASONAL-CHANGES, BODY-SIZE, TEMPERATURE, PLANKTON, BIOMASS, ZOOPLANKTON, COMMUNITY, GROWTH

See relations at Aarhus University Citationformats

ID: 130424278