Effect of fronts oceanic fronts on plankton community structure

– Ines Mangolte, LOCEAN –

Résumé :

Oceanic fronts are transition zones between water masses with different physico-chemical properties that are associated with a very dynamic horizontal and vertical circulation. Despite their ecological importance to biogeochemical cycles and higher trophic levels, the biophysical processes taking place at submescoscale fronts are poorly understood, in large part because of the challenges involved in their observation and modelling.

During this seminar, I will discuss both empirical data and numerical simulations to characterize the effect of fronts on the entire planktonic community, including other phytoplankton groups (such as cyanobacteria, coccolithophores and dinoflagellates) and zooplankton (such as copepods and appendicularians). The results show that far from being limited to the production of diatom blooms, fronts are the scene of complex biophysical couplings between top-down and bottom-up biotic interactions and horizontal transport by currents that generate planktonic communities with an original taxonomic and spatial structure.

Lien Zoom :

https://univ-tlse3-fr.zoom.us/j/97546186585?pwd=NXhlS25DamdDWkljRUd5UitIVjZUdz09

ID de réunion : 975 4618 6585

Code secret : 235317