Seasonal changes in geosmin and selected terpenes in rainbow trout (Oncorhynchus mykiss) in an outdoor recirculated aquaculture system (RAS) in Denmark were followed over three months. In the water, geosmin varied from 4.1 to 25.7 ng/L, but no seasonal trends were obvious. Variable trends occurred for geosmin relative to concentrations of inorganic N (ammonium, nitrite, and nitrate) and phosphate, and did not indicate a genera...

Summary Ikaite tufa columns from the Ikka Fjord in south‐western Greenland constitute a natural, stable environment at low temperature and with a pH ranging from neutral at the exterior to very alkaline (pH 10.4) at the interior of the column. Phylogenetic analysis of culturable organisms revealed ten different isolates representing three of the major bacterial divisions. Nine of the isolates showed 94–99% similarity to known...