Université du Québec à Rimouski
Candidat M.Sc.
superviseur(e): Christian Nozais
Phillipe Archambault
Début: 2015-09-01
Fin: 2017-04-30
Page personnelle

Projet

Short-term responses of arctic deep-sea benthic macrofauna to pulses of phytodetritus: An experimental approach
Deep-sea benthic ecosystems of the Arctic Ocean are fuelled by organic material originating from the water column. Where sea ice is present, this organic material can take the form of ice algae and phytoplankton. So far, little is known about the responses of macrofauna facing future changes regarding quantity and quality of food reaching the seafloor inflicted by sea ice reduction. We conducted on-board enrichment experiments with sediment cores collected from boxcores casts (376 m depth) in Baffin Bay to investigate the macrofauna and bacterial incorporation of two different labeled phytodetritus (13C, 15N) sources (phytoplankton: Thalassiosira nordenskioeldii and ice algae: Synedra hyperborea).Data from these cores incubations experiences could provide useful information to anticipate the responses of Arctic benthic communities to climate change.

Mots-clés

benthic ecology, Arctic, stable isotopes

Publications

1- Effect of recreational diving on Patagonian rocky reefs
Bravo, Gonzalo, Federico Márquez, Ezequiel M. Marzinelli, María M. Mendez, Gregorio Bigatti
2015 Marine Environmental Research