Fig. 3: Quantification of diazotrophs in sediment traps.
From: Diazotrophs are overlooked contributors to carbon and nitrogen export to the deep ocean
Export flux (nifH gene copies m−2 d−1) of the five diazotroph groups targeted by qPCR (UCYN-A1 symbiosis, UCYN-B, UCYN-C, Trichodesmium and Gamma-A) in sediment trap samples at 170 m, 270 m and 1000 m at A station S05M and B station S10M. Error bars represent strandard deviations from triplicate aliquotes analyzed in duplicates. C Export turnover rates (d−1)=export flux (nifH copies m−2 d−1)/integrated abundance over the photic layer (nifH copies m−2). The average export flux of the 3 sediment trap depths was used for the calculation.
