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Assessment of bacterial dependence on marine primary production along a northern latitudinal gradient ArchiMer
Fouilland, Eric; Le Floc'H, Emilie; Brennan, Debra; Bell, Elanor M.; Lordsmith, Sian L.; Mcneill, Sharon; Mitchell, Elaine; Brand, Tim D.; Garcia-martin, E. Elena; Leakey, Raymond J. G..
Recent observations in polar marine waters have shown that a large fraction of primary production may be lost to respiration by planktonic bacteria due to very low bacterial growth efficiencies in cold waters. Here we report that sea temperature may be a key factor influencing the interaction between bacteria and primary production in North Atlantic and Arctic waters, suggesting that low primary production rates could not sustain bacterial carbon demand in the coldest Arctic waters. The use of freshly produced phytoplankton exudate by bacteria in early- and mid-summer was assessed, together with the bacterial uptake of dissolved inorganic nitrogen (DIN = nitrate and ammonium), in surface waters along a latitudinal gradient from the North Sea to the Arctic...
Tipo: Text Palavras-chave: Carbon coupling; Arctic waters; Phytoplankton and bacteria interactions; Nitrogen fluxes.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00453/56417/58087.pdf
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