FN Archimer Export Format PT J TI Small-scale variability of zooplankton pyruvate kinase activity in the Gironde Estuary plume (Atlantic French Coast): A case study under unusually low freshwater discharge BT AF BERGERON, Jean-Pierre AS 1:1; FF 1:PDG-DOP-DCN-EMH; C1 IFREMER, Dept Ecol & Modeles Halieut, Ctr Nantes, F-44311 Nantes 03, France. C2 IFREMER, FRANCE SI NANTES SE PDG-DOP-DCN-EMH IN WOS Ifremer jusqu'en 2018 IF 1.733 TC 3 UR https://archimer.ifremer.fr/doc/2006/publication-1745.pdf LA English DT Article DE ;Gironde Estuary;Bay of Biscay;Pyruvate kinase;Pyruvate kinase;Carbohydrates;Zooplankton;Phytoplankton;Chlorophyll;Inorganic nutrients AB Pyruvate kinase (PK) activity measurements are used to assess the role of carbohydrates in global feeding of mesozooplankton communities inhabiting an estuary plume. As a consequence of a remarkably low freshwater discharge rate, the sea surface layers of the area under estuarine influence showed a very moderate salinity fall and a nearly total depletion in nitrates, whereas higher levels of these nutrients were found in deeper, more saline, layers. Small-scale PK activity variations in mesozooplankton appear to be closely correlated to nitrate integration values within the water column. The results were analysed in comparison with literature reports. The study produced a coherent overall interpretation, which strongly supports the reliability of this new biochemical tool in detecting assimilation of trace carbohydrates in the diet of mesozooplankton. PY 2006 PD MAY SO Estuarine, Coastal and Shelf Science SN 0272-7714 PU Elsevier VL 69 IS 3-4 UT 000240947300034 BP 662 EP 666 DI 10.1016/j.ecss.2006.05.020 ID 1745 ER EF