Effect of light on competition between the picocyanobacterium Merismopedia punctata and Microcystis aeruginosa - Université Clermont Auvergne Accéder directement au contenu
Poster De Conférence Année : 2023

Effect of light on competition between the picocyanobacterium Merismopedia punctata and Microcystis aeruginosa

Résumé

In recent years, small cyanobacteria, called picocyanobacteria are frequently observed in our water bodies. Between 2017 and 2018, they were the cause of 40% of bathing closures in the Puy-de-Dôme since they are often classified as toxinogenic. Nevertheless, little is known about their ecology, physiology and toxic potential, even if we are in a context of global warming that enhances cyanobacteria development (Carey and al 2012). Several studies on freshwater picocyanobacteria suggest that they seem to prefer lower light conditions than larger cyanobacteria (Coles and Jones 2000; Magalhães and al. 2019). As these organisms often coexist in natural environment, we performed an experiment testing their light-dependent cohabitation. Thus, we followed the growth and colonies formation of the picocyanobacterium Merismopedia and the cyanobacterium Microcystis under two light intensities (14 and 34 µE) in mono and co-cultures, where toxins concentrations have also been analysed.
Fichier non déposé

Dates et versions

hal-04282516 , version 1 (13-11-2023)

Licence

Paternité

Identifiants

  • HAL Id : hal-04282516 , version 1

Citer

Noémie Cheuvart, Benjamin Legrand, Fanny Perriere, Apostolos‐manuel Koussoroplis, Anne-Hélène Le Jeune, et al.. Effect of light on competition between the picocyanobacterium Merismopedia punctata and Microcystis aeruginosa. Phycotox 2023 : Conférence annuelle GdR Phycotox - GIS Cyanobactéries, May 2023, Nantes, France. ⟨hal-04282516⟩
20 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More