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The role of grazing on sea ice algae and sea ice bacteria by ciliates and flagellated (zooplankton) in Terra Nova Bay
Entry ID: K043_2006_2008_NZ_3


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Summary
Abstract: Sea water was collected from a depth of 2 meters below the sea ice in the region of Gondwana Station in Terra Nova Bay. Initial measurements of chlorophyll along with presence and abundance of ciliates and flagellates were made. The collected water was then divided into a range of dilutions (with the addition of filtered sea water) and deployed under the ice for 24 hours. Subsequent chlorophyll a measurements were made from each sample to determine rates of phytoplankton growth and rates of grazing in the presence of variable grazer densities. This same experiment was modified using phytoplankton and bacteria from sea ice rather than algae, to assess the rates of sea ice algal growth and rates of grazing by zooplankton. The presence and grazing pressure of protists on bacteria within the sea ice was determined by adding fluorescently labelled beads as prey surrogates to a melted sea ice samples containing grazers and using fluorescence microscopy to determine the rate of uptake over time.

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


Link: VIEW RELATED INFORMATION
Description: Investigators research page


Geographic Coverage
 N: -74.8333 S: -74.8333  E: 164.5  W: 164.5
 Min Depth: 0  Max Depth: 2

Temporal Coverage
Start Date: 2006-11-03
Stop Date: 2006-12-09

Start Date: 2007-11-10
Stop Date: 2007-12-10


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > TERRA NOVA BAY
GEOGRAPHIC REGION > POLAR


Science Keywords
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CHLOROPHYLL    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >FLAGELLATES    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >CILIATES    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >MICROALGAE    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >PLANKTON >ZOOPLANKTON    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >PLANKTON >PHYTOPLANKTON    [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 >PRIMARY PRODUCTION    [Definition]


ISO Topic Category
BIOTA
OCEANS


Instrument
FLUORESCENCE MICROSCOPY    [Information]


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


Data Set Progress
COMPLETE


Originating Center


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



Creation and Review Dates
DIF Creation Date: 2005-09-22
Last DIF Revision Date: 2009-03-16


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