Characterization of the community of snow algae and their photochemical performance in situ in the Giant Mountains, Czech Republic

0347453 - BÚ 2011 RIV US eng J - Journal Article
Kvíderová, Jana
Characterization of the community of snow algae and their photochemical performance in situ in the Giant Mountains, Czech Republic.
Arctic Antarctic and Alpine Research. Roč. 42, č. 2 (2010), s. 210-218. ISSN 1523-0430. E-ISSN 1938-4246
R&D Projects: GA AV ČR KJB600050708
Institutional research plan: CEZ:AV0Z60050516
Keywords : snow algae * environment, * photochemistry
Subject RIV: EF - Botanics
Impact factor: 1.600, year: 2010

The environment of the snow algae community is characterized by stable snow temperature and variable PAR and UVR. The nutrient concentrations are comparable to eutrophic water and the algae are observed in areas with increased phosphorus concentration at the margins of a snow field. The measurements of the variable chlorophyll fluorescence revealed only minor photoinhibition. Although the photochemical parameters (Fv/Fm, rETRmax and alpha) are negatively correlated with air temperature, PAR and UVR, the saturation irradiance was not affected. Flagellate cells of Chloromonas cf. nivalis protect themseves against excessive PAR+UVR by active migration in snow.
Permanent Link: http://hdl.handle.net/11104/0188226