Cyanobaktérie a sprievodné riasy pri tvorbe recentných sladkovodných stromatolitov
Cyanobacteria and accompanying algae in formation of recent freshwater stromatolites
Program: VEGA
Zodpovedný riešiteľ: Mgr. Hindáková Alica PhD.
Annotation: The main scientific goal of the project is to study biodiversity of dominant cyanobacteria recently forming stromatolites in Slovakia. According to our preliminary studies, these specific calcified colonies are composed mainly by genera Rivularia (R. haematites), and by Calothrix, Scytonema, Stigonema and some other oscillatorian species as well. The material is being continuosly collected from recently active travertine localities in Slovakia. Molecular analysis of collected microorganisms and subcultures will confirm morfology based on contemporaly taxonomy. Obtained molecular data will be compared with data from various database in Europe. Accompanying cyanobacteria (e.g. from the genera Chroococcus, Merismopedia, Leptolyngbya, Heteroleibleinia, Nostoc) and algae (diatoms, chlorococcal and trichal green algae) of stromatolites will be studied, too. Material preserved by formaldehyde, microphotos and permanent diatom slides serve for determination, documentary and comparatively purposes. Localities with recent formation of freshwater stromatolites belong to the endangered biotopes, very sensitive to eutrophisation and human activities, therefore their protection is highly topic.
Duration: 1.1.2015 – 31.12.2018
Odkrývanie procesov zodpovedných za súčasný geografický areál symbiotických organizmov s Mediteránnym rozšírením
Unraveling processes responsible for the contemporary geographic range of symbiotic organisms with Mediterranean distribution
Program: VEGA
Zodpovedný riešiteľ: Mgr. Bérešová Anna PhD.
Annotation: Lichenization is one of the most successful fungal nutritional strategies that also enable lichens to adapt to changing ecological conditions. The aim of the project is to find out, whether symbiotic interactions play any role in shaping lichen distributional range. We focus on model lichens with Mediterranean distribution. We aim to find out whether photobiont diversity matches the so far unrecognized genetic diversity of the mycobiont across its distributional range. In particular, we will search for an evidence of photobiont switching, which can be a driver for increase in ecological plasticity of some lichen species.
Duration: 1.1.2017 – 31.12.2020