PLANKTON COMMUNITY FATE WHEN TRANSPORTED THROUGH THE ATLANTIC OCEAN IN AGULHAS RINGS.
Despite being the main choke point of the global ocean circulation, the role of the Agulhas leakage in the biology of oceanic ecosystems is virtually unknown. Using the Tara Oceans holistic approach, we characterized both physically and biologically (using genetics and imagery) two Agulhas rings of 9 months and 3 years-old respectively. Features observed for the rings were compared with water properties from the 3 surrounding oceans (Indian, Atlantic and Southern Oceans). In the younger ring, an elevated nitrite signature, which may be explained by deep mixing events, is associated with specific taxa of Archeae, Cyanobacteria and Eukaryota. The overall high similarity between Indian and South Atlantic Oceans plankton communities suggests that Agulhas leakage is highly efficient in plankton transport. However, since the ring physical environment and its plankton community are clearly distinct from both source and destination oceans, we suggest that: 1) the global plankton community structure from indian ocean origin is severely remodeled due to environmental forcing during ring transport 2) the Indian / Atlantic plankton similarity is maintained by the accumulation of the ring-transported resilient species.
Villar, E., CNRS, UMR 7256 - Information Genomique et structurale, France, firstname.lastname@example.org
Hingamp, P., CNRS, UMR 7256 - Information Genomique et structurale, France, email@example.com
Not, F., CNRS, UMR 7144 - Adaptation et Diversite en Milieu Marin, France, firstname.lastname@example.org
Iudicone, D., Stazione Zoologica Anton Dohrn, Italy, email@example.com
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: No