The biomass, productivity, physiology and grazing pressures of phytoplankton during the polar winter in the Ross Sea region
Entry ID: K043_2007_2008_NZ_1

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Summary
Abstract: What happens to primary production during the long polar night was investigated in the Ross Sea region. Phytoplankton samples were obtained from the water column at Cape Armitage and Cape Evans. Phytoplankton chlorophyll biomass was assessed by standard fluorometric methods using filtered samples. The photosynthesis rate (productivity) and photophysiology of phytoplankton was measured using Water PAM and Microscope PAM to determine maximum quantum yield of fluorescence, the photoadaptive index (Ek), relative electron transfer rate (reIETRmas) and photosynthetic efficiency on cells of common species. This was used to determine which taxa are the most physiological active and which are more able to adapt to the low light conditions of winter. The allocation of photosynthate into protein, polysaccaride, lipid and low molecular weight metabolites in naturally occurring phytoplankton and sea ice algae communities was examined. Phytoplankton growth rate and grazing rates were determined by measuring chlorophyll a concentrations over time from sea water samples containing variable ciliates and flagellates densities. Using phytoplankton and bacteria from sea ice, the rates of sea ice bacteria and algal growth and rates of grazing by zooplankton was assessed.

Related URL
Link: VIEW RELATED INFORMATION
Description: LGP Project Homepage


Link: VIEW RELATED INFORMATION
Description: Investigators research page


Geographic Coverage
 N: -77.85 S: -77.85  E: 166.6667  W: 166.6667
 N: -77.6333 S: -77.6333  E: 166.4  W: 166.4

Temporal Coverage
Start Date: 2007-08-24
Stop Date: 2007-09-27

Start Date: 2008-09-04
Stop Date: 2008-10-05

Start Date: 2009-08-25
Stop Date: 2009-10-09


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > CAPE ARMITAGE
CONTINENT > ANTARCTICA > CAPE EVANS
CONTINENT > ANTARCTICA > ROSS ISLAND
GEOGRAPHIC REGION > POLAR
OCEAN > SOUTHERN OCEAN > ROSS SEA


Science Keywords
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CHLOROPHYLL    [Definition]
BIOLOGICAL CLASSIFICATION >BACTERIA/ARCHAEA    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >MICROALGAE    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >PLANKTON >PHYTOPLANKTON    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >MARINE HABITAT    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >SPECIES/POPULATION INTERACTIONS >GRAZING DYNAMICS/PLANT HERBIVORY    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >COMMUNITY DYNAMICS >BIODIVERSITY FUNCTIONS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >PHOTOSYNTHESIS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >BIOMASS DYNAMICS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >PRIMARY PRODUCTION    [Definition]


ISO Topic Category
BIOTA
OCEANS


Platform
LABORATORY    [Information]
FIELD INVESTIGATION    [Information]


Instrument
PAM >PORTABLE FLUORESCENCE ANALYZERS    [Information]


Project
LGP >Latitudinal Gradient Project    [Information]
EBA >Evolution and Biodiversity in the Antarctic    [Information]


Quality
Existing samples are held at Victoria University of Wellington with a spreadsheet of sample numbers. All raw data is held by the investigators. Please contact Dr Ken Ryan for more information.


Data Set Progress
COMPLETE


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
KEN RYAN
Role: INVESTIGATOR
Phone: +64 4 463 6083
Fax: +64 4 463 5331
Email: ken.ryan at vuw.ac.nz
Contact Address:
Victoria University of Wellington
School of Biological Sciences
PO BOX 600
City: Wellington
Postal Code: 6140
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Publications/References
McMinn, A., Martin, A. and Ryan, K.G. 2010. Phytoplankton and sea ice algal biomass and physiology during the transition between winter and spring (McMurdo Sound, Antarctica). Polar Biology DOI: 10.1007/s00300-010-0844-6.

Creation and Review Dates
DIF Creation Date: 2005-09-22
Last DIF Revision Date: 2010-09-20

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