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The biomass, productivity and biodiversity of algae in the Cape Hallett region
Entry ID: K043_2003_2005_NZ_1


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Summary
Abstract: The distribution and biodiversity of algae was assessed to enable possible future predictions of the effects of global warming. Sites (5 in the first season, 4 in the second) were established around the Cape Hallett peninsula and samples of algae were collected from the ice at regular intervals. As far as possible these sites represented the range of conditions of sea ice in the region. CTD probes measured chlorophyll concentration, temperature and salinity. Algae samples were collected from ice samples, water samples (collected from 5, 25 and 50m depths) and from the sea floor and were used to determine chlorophyll concentration using fluorometry, for carbon and nitrogen concentrations, DNA content, MAA composition, biodiversity and cell numbers (algae and bacteria). PAM and PEA were used to assess photosynthetic capacity of algae extracted from the sea ice. This method was used to determine the response of the algal community to experimentally induced changes in salinity, temperature and light levels. Molecular biological techniques were used to characterise the prokaryotic community in the sea ice and in the water beneath the ice.

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


Link: VIEW RELATED INFORMATION
Description: Investigators research page


Geographic Coverage
 N: -72.3166 S: -72.3166  E: 170.2666  W: 170.2666

Temporal Coverage
Start Date: 2003-11-19
Stop Date: 2003-12-16

Start Date: 2004-11-12
Stop Date: 2004-12-07


Location Keywords
CONTINENT > ANTARCTICA > CAPE HALLETT
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


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 >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
FIELD SURVEYS    [Information]
LABORATORY    [Information]
FIELD INVESTIGATION    [Information]


Instrument
CTD >Conductivity, Temperature, Depth    [Information]
GRAB SAMPLERS    [Information]
ICE AUGERS    [Information]
WATER BOTTLES
PAM >PORTABLE FLUORESCENCE ANALYZERS    [Information]


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


Quality
The data is contained in the publications. Existing samples are held at Victoria University of Wellington with a spreadsheet of sample numbers. All raw data is held by the investigator. 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
Ralph, P., Ryan, K.G., Martin, A. And Fenton, G. 2007. Melting out of sea ice causes greater photosynthetic stress in algae than freezing in. Journal of Phycology 43: 948-956.

Ryan, K.G. Hegseth, E.N. Martin, A. Davy, S.K. O’Toole, R. Ralph, P.J. McMinn, A. Thorn, C.J. 2006 Comparison of the microalgal community within fast ice at two sites along the Ross Sea coast, Antarctica. Antarctic science 18(4): 583-594 doi: 10.1017/S0954102006000629

Creation and Review Dates
DIF Creation Date: 2005-09-22
Last DIF Revision Date: 2009-02-27


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