Occurrence of the First Toxic Microcystis Bloom in a Recent Moroccan Reservoir |
| |
| Authors: | H Ait Hammou D Latour S Samoudi K Mouhri M Douma J Robin M Loudiki |
| |
| Institution: | 1.Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Science Semlalia,Cadi Ayyad University,Marrakech,Morocco;2.Laboratory of Microorganisms: Genome and Environment,Blaise Pascal University,Clermont Ferrand,France;3.UMR 6023, LMGE,CNRS,Aubière cedex,France;4.UMR 5023 LEHNA, Lyon1 University, ENTPE, CNRS, ISARA,Lyon University,Lyon cedex 07,France |
| |
| Abstract: | In order to understand initial conditions that promote the first occurrence of a Microcystis aeruginosa bloom and to evaluate its toxic potential, we studied spatio-temporal dynamics of phytoplankton, including Microcystis, microcystins concentrations, the relative proportion of potentially microcystin producing cells and physicochemical parameters in the recently setup Moroccan reservoir “Yaacoub Al Mansour.” High summer temperatures, thermal stability, hydrological stability of the water column and the decrease of nutrient contributions seem to be the major environmental factors responsible of this first bloom occurrence. Despite the low cellular abundance, high microcystins concentrations, associated with low percentage of toxic strains, were measured. Thus, microcystins analysis and associated management of the reservoir are necessary from the beginning of the setup and can help managers to find the better environmental strategy against early cyanobacteria proliferations. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
