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| Mémoire N° | 231 |
| Auteur | VLADIMIROVA Katerina Krasimirova |
| Titre | Comparison of long-term dynamics of Microcystin-producing cyanobacteria in Danube Delta’s Lakes using quantitative Real-Time PCR |
| Thématique & formation | Sciences de l'eau - BA en Géographie |
| Résumé | |
| Summary | Cyanobacteria are a dominant component of phytoplankton and they can be found in all aquatic ecosystems, ranging from hydrothermal springs to Arctic zones. Their unique eco-physiological adaptations in addition to the physical and chemical characteristics of the aquatic systems allow cyanobcaterial genera to dominate over phytoplankton communities and form cyanobacterial harmful algal blooms (CyanoHABs). The development of CyanoHABs is a problem since it has been reported that some bloom-forming cyanobacterial genera produce toxins during their growth or decay. The presence of cyanobacteria able to produce toxins can compromise water quality leading to both economic and public health concerns such as fish-die-offs, digestive, neurological or skin diseases and even human death. These negative effects enhance the necessity for a better understanding of the processes leading to bloom formation. Application of molecular tools on DNA archived in lake sediments could provide information on quantitative proportions of species and past changes in phytoplankton composition in lakes. In this study we applied a DNA-based paleolimnological approach to sediment records from three lakes located in Danube’s Delta that has experienced changes in environmental conditions in the past decade, i.e. eutrophication between 1970s and late 1980s characterized by shift in cyanobacterial abundance. |
| Volée | 2012 |
| Date et heure soutenance | 06-09-2016 11:15 |
| Salle soutenance | B003 Uni Carl Vogt |
| Collation | 35 pages; 10 figures; 3 tableaux |
| Remarque | |
| Mot-clés | Cyanobacteria, microcystin, sedimentary DNA, Danube Delta’s Lakes |
| Cote bibliothèque | |
| Stage organisme | Institute F.-A. Forel INRA Thonon-les-Bains |
| Maître de stage | |
| Projet recherche | |
| Bourse | |
| Terrain d'étude ou d'application | Ecologie microbienne |
| Documents associés |
Fiche analytique |
| Dernière mise à jour |
2023-03-24 14:47:34 |