Dear Akvasemers,
We are pleased to invite you for a double Akvasem session this Friday, 30.11, from 11.15 to 13.00 in room D-111 at NFH.
Our two distinguished speakers are Pernilla Carlsson and CJ Mundy.
Pernilla Carlsson, a researcher at the Norwegian Institute for Water Research (NIVA), will be talking about “(New) pollution in the Arctic - what to find and how to find it.” and CJ Mundy, an assistant professor at the University of Manitoba in Canada, will be talking about "On the role of tides and ice algal intracellular nutrients on bloom dynamics”. For more information, the synopsis are given at the bottom of this email.
We hope to see you there,
The AkvaSem Team
(Bernhard, Coralie, Ulrike and Tobias)
12.15-13.00 CJ Mundy
"Nutrient availability is a main factor influencing maximum production, taxonomic composition, and termination of the spring ice algae bloom in ice-covered seas. However, measuring nutrients available to ice algae is not a straightforward task and a lack of a standard method for sea ice researchers has plagued the field. In particular, there has been a common assumption that as ice core samples melt, nutrients remain conservative and therefore, their concentrations in ice melt would be a function of salinity. However, positive relationships between nutrient concentrations and algal biomass in ice melt samples led studies dating back to the early 90s to hypothesize that algae maintain an intracellular nutrient pool that is released upon melting an ice core due to osmotic stress. As part of a process-based landfast ice study, we collected a bottom-ice dataset during the 2010 and 2012 spring ice algal bloom seasons to test this hypothesis. In this talk, I will discuss the findings of this work in light of additional ice-algal research my group has undertaken in a strongly nitrogen-limited sea.”