Long-term acclimation might enhance the growth and competitive ability of Microcystis aeruginosa in warm environments.

0555195 - BC 2022 RIV GB eng J - Článek v odborném periodiku
Drugă, B. - Ramm, E. - Szekeres, E. - Chiriac, Maria-Cecilia - Hegedüs, A. - Stockenreiter, M.
Long-term acclimation might enhance the growth and competitive ability of Microcystis aeruginosa in warm environments.
Freshwater Biology. Roč. 67, č. 4 (2022), s. 589-602. ISSN 0046-5070. E-ISSN 1365-2427
Institucionální podpora: RVO:60077344
Klíčová slova: climate change * cyanobacteria * long-term studies * mesocosms * plankton communities
Obor OECD: Marine biology, freshwater biology, limnology
Impakt faktor: 2.7, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1111/fwb.13865

The positive effect of global warming on the growth of cyanobacteria has been widely predicted, but long-term studies targeting their adaptive potential to higher temperature have not been carried out so far. Predicting the magnitude and impact of cyanobacterial blooms in the future as a response to global warming requires an understanding of how cyanobacteria might change in the long term due to climate change. Here we examined the effect of exposing three Microcystis aeruginosa strains isolated in Romania to ambient (22 degrees C) and high (26 degrees C) temperature for 6 months. Then, the competitive ability of the strains after heat acclimation was evaluated, by analysing their impact on plankton community composition. One of the three strains displayed significantly higher growth rates after 6 months of cultivation at higher temperatures. Following inoculation into a natural plankton community, the overall cyanobacterial abundance significantly increased in the cultures inoculated with this heat-acclimated strain of M. aeruginosa as compared to the ambient-acclimated version. The structure of eukaryotic communities was impacted by both inoculated cyanobacteria and temperature during the experiments. The results of this study emphasise the high potential of cyanobacteria to respond to stressors, and highlight the fact that previous acclimation to warming is a critical factor in shaping the overall structure of plankton communities. Our study strongly advocates for including a step of culture acclimation to future experimental conditions in research programmes aiming to better understand the long-term impact of climate change on aquatic ecosystems.
Trvalý link: http://hdl.handle.net/11104/0329720