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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
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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.
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Related URL
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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 |
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| N: -77.6333 | S: -77.6333 | E: 166.4 | W: 166.4 |
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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
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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
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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
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Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand
[Information]
Data Center URL: http://www.antarcticanz.govt.nz/
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Personnel
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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 |
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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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