(Table 1) Dissolved organic carbon, water temperature and conductivity in three subarctic ponds near Kilpisjärvi, North Finland ...

• Main Authors: Zellmer, Iris D, Arts, M, Abele, Doris, Humbeck, Klaus
• Format: Dataset
• Language: English
• Published: PANGAEA 2004
• Subjects: Lake; DATE/TIME; Depth, bottom/max; Description; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; Temperature, water; Temperature, water, standard deviation; Conductivity, electrolytic; Conductivity, standard deviation; Water sample; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarctic; Arctic; Kilpisjärvi; Klaus; Antarc*; North Finland; Sea ice; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.858495; https://doi.pangaea.de/10.1594/PANGAEA.858495

Daphnia was collected from five subarctic ponds which differed greatly in their DOC contents and, consequently, their underwater light (UV) climates. Irrespective of which Daphnia species was present, and contrary to expectations, the ponds with the lowest DOC concentrations (highest UV radiation levels) contained Daphnia with the highest eicosapentaenoic acid (EPA) concentrations. In addition, EPA concentrations in these Daphnia generally decreased in concert with seasonally increasing DOC concentrations.Daphnia from three of the ponds was also tested for its tolerance to solar ultraviolet radiation (UVR) with respect to survival. Daphnia pulex from the clear water pond showed, by far, the best UV-tolerance, followed by D. longispina from the moderately humic and D. longispina from the very humic pond. In addition, we measured sublethal parameters related to UV-damage such as the degree to which the gut of Daphnia appeared green (as a measure of their ability to digest algae), and whether their guts ... : Supplement to: Zellmer, Iris D; Arts, M; Abele, Doris; Humbeck, Klaus (2004): Evidence of sublethal damage in Daphnia (Cladocera) during exposure to solar UV radiation in subarctic ponds. Arctic, Antarctic, and Alpine Research, 36(3), 370-377 ...