New BioGEOTRACES data sets: Connecting pieces of the microbial biogeochemical puzzle

Microorganisms play a central role in the transfer of matter and energy in the marine food web. Microbes depend on micronutrients (e.g. iron, cobalt, zinc, and a host of other trace metals) to catalyze key biogeochemical reactions, and their metabolisms, in turn, directly affect the cycling, speciation, and bioavailability of these compounds. One might therefore […]

Dec / 20 / 2018

Siderophores facilitate microbial adaptation to iron limitation in the eastern tropical Pacific Ocean

Siderophores are organic compounds secreted by microbes to facilitate iron uptake. Using new methods to characterize trace metal organic ligands in seawater, Boiteau and colleagues (2016, see reference below) measured the distribution of siderophores along the US East Pacific Zonal Transect (EPZT; GEOTRACES GP16). The cruise track crossed from the highly productive Peruvian coastal upwelling […]

Jan / 23 / 2017