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Title

Impacts of extreme air temperatures on cyanobacteria in five deep peri-Alpine lakes

Publication Year

2011

Author(s)
  • Gallina, Nicole
  • Anneville, Orlane
  • Beniston, Martin
Source
JOURNAL OF LIMNOLOGY Volume: 70 Issue: 2 Pages: 186-196 Published: 2011
ISSN
1129-5767 eISSN: 1723-8633
Abstract

Cyanobacteria are of major interest in freshwater ecosystems, since they are able to produce toxins with potentially negative impacts on the environment, health and thus on economics and society. It is therefore important for water management authorities to assess the manner in which cyanobacteria may evolve under climate change, especially in the Alpine Region where warming is projected by climate models to be More important than the global average. In this study, air temperature extremes under current climate were used as a proxy for future average climate forced by enhanced greenhouse gas concentrations. The impacts of extreme temperature events on cyanobacteria were analyzed in five deep pen-Alpine lakes, covering the entire trophic gradient and using a synoptic approach. Extreme air temperatures were observed to alter the biomass of the cyanobacteria community. In general, extreme hot events are associated with high biomass while extreme cold events are characterised by low biomass. However, the assessed air temperature extremes did not lead to a dominance of cyanobacteria over the other phytoplankton groups, which also showed responses in relative biomass change during extreme events. Both extreme hot and extreme cold events were seen to generate a loss of diversity among cyanobacteria. In addition, the use of extreme events as a proxy to average future climates is a useful approach to enhance possible impacts of Attire global warming on the biota in freshwater systems. The outcomes of a synoptic approach provide general responses and are a useful tool for further modelling purposes.

Author Keyword(s)
  • climate change
  • biodiversity
  • phytoplankton
  • meteorological forcing
  • synoptic study
KeyWord(s) Plus
  • CLIMATE-CHANGE
  • ALGAL BLOOMS
  • WATER
  • PHYTOPLANKTON
  • BIODIVERSITY
  • SWITZERLAND
  • COMMUNITY
  • DYNAMICS
  • EVENTS
  • TOXINS
ESI Discipline(s)
  • Environment/Ecology
  • Plant & Animal Science
Web of Science Category(ies)
  • Limnology
Adress(es)

[Gallina, Nicole; Beniston, Martin] Univ Geneva, Inst Environm Sci ISE, Climate Change & Climate Impacts Res Grp, CH-1227 Carouge, Switzerland; [Anneville, Orlane] INRA, UMR CARRTEL, Stn Hydrobiol Lacustre, F-4203 Thonon Les Bains, France

Reprint Adress

Gallina, N (reprint author), Univ Geneva, Inst Environm Sci ISE, Climate Change & Climate Impacts Res Grp, 7 Rte Drize, CH-1227 Carouge, Switzerland.

Country(ies)
  • France
  • Switzerland
CNRS - Adress(es)
    Accession Number
    WOS:000294320400004
    uid:/3CNF9G1C
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