The paper presents the results of a study of cyanobacteria and green algae assemblages occurring in various tundra types determined on the basis of mosses and vascular plants and habitat conditions. The research was carried out during summer in the years 2009-2013 on the north sea-coast of Hornsund fjord (West Spitsbergen. Svalbard Archipelago). 58 sites were studied in various tundra... https://www.littletreehouselanes.shop/product-category/teething-toy-sensory-toy/