Fig. 3: Primary production and nitrogen fixation rates. | Communications Earth & Environment

Fig. 3: Primary production and nitrogen fixation rates.

From: Nitrogen fixation under declining Arctic sea ice

Fig. 3

Primary production rates (13C-tracing) (A) and nitrogen fixation rates (B) at each station. Stars denote statistically significant differences (p < 0.05, n = 3) between no treatment and dissolved organic carbon (DOC) treatment at the respective station. Error bars represent one standard deviation. NA not analysed, ND not detected (below the limit of detection; Supplementary Datasheets S1, S2), CAO Central Arctic Ocean, MIZ marginal ice zone, Tr. 1 transect one, Tr. 2 transect two, MYI multiyear ice, MYI-decay decaying multiyear ice, AW Atlantic open water, HM high melt, Pack pack ice, LF land-fast ice.

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