Role of krill versus bottom-up factors in controlling
phytoplankton biomass in the northern Antarctic waters of South
Georgia Whitehouse, M.J.; Atkinson, A.; Ward, P.; Korb, R.E.;
Rothery, P.; Fielding, S.. 2009 Role of krill versus bottom-up
factors in controlling phytoplankton biomass in the northern
Antarctic waters of South Georgia. Marine Ecology Progress
Series, 393. 69-82. 10.3354/meps08288Before downloading, please
read NORA policies. m393p069.pdf - Published Version Restricted
to NORA staff only until 1 October 2014. The extent to which
Antarctic phytoplankton stocks are controlled by 'bottom-up'
and/or 'top-down' factors is highly variable. Here we consider
data collected at South Georgia during 3 summer surveys that
recorded substantial hydrographic variability. A suite of
bottom-up and top-down controlling factors were measured
simultaneously at the mesoscale. Sea surface temperature varied
by >2 degrees C, macronutrients ranged from near-winter
concentrations to near-depleted, while mean densitie