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Microbial mat development and production variation in relation to physio-chemical variation in 13 ponds that all originated from one greater pond near Bratina Island on the McMurdo Ice Shelf
Entry ID: K081_2005_2006_NZ_1


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Summary
Abstract: Microbial mat development and production varies from pond to pond due to the physio-chemical variation amongst the ponds. To study this variation a series of 13 ponds were selected that had originated from one greater pond which had drained due to a tide crack opening up. Cores of microbial mats were collected from all 13 ponds for particulate nutrient and pigment analyses, biomass determination and species composition. Surface water samples from 13 ponds were also collected for phytoplankton, chlorophyll a, particulate nutrients and dissolved nutrient analysis. Photosynthesis and nitrogen fixation experiments were conducted on microbial mats collected from 7 ponds. Conductivity and pH measurements, coupled with gross mat morphology were used to select the most contrasting ponds. Collected samples were experimented on and the photosynthesis and respiration rates were determined by measuring the rate of evolution or consumption of oxygen using oxygen electrodes. Samples for dissolved inorganic carbon uptake were taken and injected into vacuette tubes for analysis. Nitrogen fixation was determined and gas samples from the nitrogen fixation were then collected for analysis by gas chromatography.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: National Institute for Water and Atmospheric Research (NIWA)


Geographic Coverage
 N: -78.0 S: -78.0  E: 165.3333  W: 165.3333

Temporal Coverage
Start Date: 2005-12-19
Stop Date: 2005-12-28


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > BRATINA ISLAND
GEOGRAPHIC REGION > POLAR


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >WETLANDS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CONDUCTIVITY    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >PH    [Definition]
BIOLOGICAL CLASSIFICATION >BACTERIA/ARCHAEA >CYANOBACTERIA (BLUE-GREEN ALGAE)    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >MICROALGAE    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >NUTRIENT CYCLING    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >PHOTOSYNTHESIS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS    [Definition]


ISO Topic Category
BIOTA
INLAND WATERS


Project
LTER >Long-Term Ecological Research    [Information]
LGP >Latitudinal Gradient Project    [Information]
EBA >Evolution and Biodiversity in the Antarctic    [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
BRIAN SORRELL
Role: INVESTIGATOR
Phone: +64 3 343 7802
Fax: +64 3 348 5548
Email: b.sorrell at niwa.co.nz
Contact Address:
NIWA
PO BOX 11-115
City: Christchurch
Country: New Zealand


IAN HAWES
Role: INVESTIGATOR
Email: AquaticResearchSolutions at gmail.com
Email: ian.hawes at canterbury.ac.nz
Contact Address:
Waterways Centre for Freshwater Management
University of Canterbury
City: Christchurch
Country: New Zealand


CLIVE HOWARD-WILLIAMS
Role: INVESTIGATOR
Phone: +64 3 343 7857
Fax: +64 3 348 5548
Email: c.howard-williams at niwa.co.nz
Contact Address:
NIWA
PO BOX 8602
City: Christchurch
Country: New Zealand


CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
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
Jungblut, A.D. and Neilan, B.A. 2010. NifH gene diversity and expression in a microbial mat community on the McMurdo Ice Shelf, Antarctica. Antarctic Science 22(2): 117-122.

Howard-Williams, C. Hawes, I. Ecological processes in Antarctic inland waters: interactions between physical processes and the nitrogen cycle. Antarctic science 19(2): 205-217, 2007.

Sutherland, D.L. Microbial mat communities in response to recent changes in the physiochemical environment of the meltwater ponds on the McMurdo Ice Shelf, Antarctica. Polar biology 32:1023-1032 2009. doi: 10.1007/s00300-009-0601-x

Creation and Review Dates
DIF Creation Date: 2008-10-06
Last DIF Revision Date: 2010-08-30


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