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Session 6
Zooplankton in polar ecosystems and extreme environments


Angus Atkinson (British Antarctic Survey, UK)
Carin Ashjian (Woods Hole Oceanographic Institution, USA)

Invited Speaker:

Øystein Varpe (Norwegian Polar Institute, Norway)

Polar waters and their marginal seas are characterised by low, fairly stable temperatures, intense variation in solar radiation amplifed by winter ice cover, and high seasonal variation in pelagic primary production. Further, the fastest warming regions on the planet are at high latitudes. These habitats are undergoing dramatic environmental changes such as summer sea ice retreat in the Western Arctic, and are predicted to show the firstsigns of carbonate under-saturation. The extreme polar conditions require adaptations by micro-, meso-, and macro-zooplankton (herein “zooplankton”) including stenothermy, shrinkage, use of sea ice, differing phenologies, seasonal migrations and diet shifts plus pulsed reproduction and slow, strongly seasonal growth. Some of these attributes make polar zooplankton potentially sensitive even to small changes in temperature, sea ice extent, seasonality and the timing of food. Polar ecosystems also can provide glimpses into the future of climate change. They provide a natural test-bed to examine both the sensitivity (e.g. physiological limits) and the resilience (e.g. behavioural flexibility)of zooplankton. In this session we welcome studies from high latitudes of both hemispheres, examining the response of zooplankton to spatial and temporal environmental variability and change. We welcome also broader scale comparative contributions (of species, regions or hemispheres), especially those that explore the mechanisms of sensitivity or resilience.

March 14, 2011

Øystein Varpe (Invited)
Adaptations to seasonality and the annual routine perspective for zooplankton (S6-7484)
(pdf, 2 Mb)

Albert Calbet, Enric Saiz, Karen Riisgaard, Rodrigo Almeda, Ignacio Movilla, Miquel Alcaraz, Sara Zamora and Torkel Gissel Nielsen
Microzooplankton grazing in Arctic waters (S6-6880)
(pdf, 2.2 Mb)
Stéphane Plourde, Carin J. Ashjian, Robert G. Campbell and Celia Gelfman
The energy budget of egg production in Calanus glacialis during spring and summer in the Beaufort-Chukchi Seas (S6-7220)
(pdf, 0.4 Mb)
Sara Zamora, Torkel Gissel Nielsen and Enric Saiz
Plankton community structure and role of Oithona similis on the western coast of Greenland (S6-6883)
(waiting for permission)
Sanne Kjellerup, Rasmus Swalethorp, Karen Riisgaard and Torkel Gissel Nielsen
Population dynamics and life strategy of the copepod Metridia longa in a Greenlandic fjord, 2010 (S6-6948)
(pdf, 1.1 Mb)
Ksenia N. Kosobokova and Hans-Juergen Hirche
Is Arctic zooplankton sleeping in the winter? (S6-7135)
(pdf, 1 Mb)
Humberto E. González, M.G. Mazzocchi, I. Borrione, Ricardo Giesecke, G. Mahadik, M. Marchant, E. Menschel, P. Martin, M. Ribera d´Alcala and Pieter Vandromme
A phytoplankton bloom controlled by zooplankton grazing during the LOHAFEX iron-fertilisation experiment in the S-W Antarctic Circumpolar Current (S6-6993)
(permission to post denied, contact presenter)
C. Tracy Shaw, Robin M. Ross and Langdon B. Quetin
Effect of sea ice conditions on physiological maturity of female Antarctic krill (Euphausia superba) west of the Antarctic Peninsula
(pdf, 0.4 Mb)
Miquel Alcaraz, Rodrigo Almeda, Enric Saiz, Albert Calbet, Carlos M. Duarte, Susana Agustí, Rocio Santiago, Juancho Movilla, Alejandro Alonso, Jorge Felipe, Elena Arashkevich and Ulrike Grote
Arctic zooplankton in a warming scenario: Metabolism, tipping points and stoichiometry of regenerated nutrients (S6-6888)
(pdf, 0.8 Mb)
Rubao Ji, Carin J. Ashjian, Robert G. Campbell, Changsheng Chen, Guoping Gao, Cabell Davis, Geoffery Cowles and Robert Beardsley
Life history and biogeography of Calanus copepods in the Arctic Ocean: An individual-based modeling study (S6-6914)
(waiting for permission)
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    November 5 , 2010
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    December 15 , 2010
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