Les facteurs environnementaux (physiques, chimiques et biologiques) influencent la
composition des communautés de phytoplancton marin. D'autre part, le transport dynamique …

Diazotrophs and N 2 fixation are not homogenously distributed across the oceans, but have
distinct patterns of rates, abundances and species composition. These patterns reflect the …

Local coupling between nitrogen fixation and denitrification in current biogeochemical
models could result in runaway feedback in open-ocean oxygen minimum zones (OMZs) …

Nitrogen is a key element for life in the oceans. It controls primary productivity in many parts
of the global ocean, consequently playing a crucial role in the uptake of atmospheric carbon …

N 2 fixation is an important process in ecosystems, and performed by a wide variety of
different microorganisms, both free-living and symbiotic. In the marine environment, most N …

Phototrophic phytoplankton fuel the marine food web and play a role in all major
biogeochemical cycles in our ecosystem. They are responsible for over half of the world's …

Climate change and anthropogenic factors are altering both the marine environment and the
composition of the marine microbial communities that are the major drivers of marine …

Marine productivity is limited by nitrogen in a large portion of the global ocean. Marine
nitrogen fixation, catalyzed by a select group of microorganisms called diazotrophs, converts …

Crocosphaera watsonii (hereafter Crocosphaera) is a key nitrogen (N) fixer in the ocean, but
its ability to consume combined N sources is still unclear. Using in situ microcosm …

Microorganisms play a critical role in controlling the source-sink behavior and cycling of
major and minor elements in the biosphere. This occurs through cellular metabolic …