Cobalamin and microbial plankton dynamics along a coastal to offshore transect in the Eastern North Atlantic Ocean

25 pages, 1 table, 5 figures
Cobalamin (B12) is an essential cofactor that is exclusively synthesized by some prokaryotes while many prokaryotes and eukaryotes require an external supply of B12. The spatial and temporal availability of B12 is poorly understood in marine ecosystems. Field measurements of B12 along with a large set of ancillary biotic and abiotic factors were obtained during three oceanographic cruises in the NW Iberian Peninsula, covering different spatial and temporal scales. B12 concentrations were remarkably low (
The scintillation counter was supported by the 2006‐06 ICTS project of the Ministry of Science and Innovation at the Spanish Institute of Oceanography. This research was supported by the Spanish Ministry of Economy and Competitiveness through the ENVISION (CTM2014‐59031‐P) and INTERES (CTM2017‐83362‐R) projects. Further support was provided by the Swedish Research Council VR. Vanessa Joglar was supported by an FPI fellowship from the Spanish Ministry of Economy and Competitiveness