Počet záznamů: 1

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

  1. 1.
    0347453 - BU-J 2011 RIV US eng J - Článek v odborném periodiku
    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
    Grant CEP: GA AV ČR KJB600050708
    Výzkumný záměr: CEZ:AV0Z60050516
    Klíčová slova: snow algae * environment, * photochemistry
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 1.600, rok: 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.
    Trvalý link: http://hdl.handle.net/11104/0188226