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Carbon and nitrogen fixation rates from microbial mat populations in moraine ponds on the McMurdo Ice Shelf
Entry ID: K081_2004_2005_NZ_4

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Summary
Abstract: Carbon and nitrogen fixation experiments were conducted on mats collected from 10 of the ponds on the McMurdo Ice Shelf near Bratina Island. Nitrogen fixation was determined via reduction of acetylene gas and gas chromatography. Carbon fixation was measured via oxygen evolution and dissolved inorganic carbon uptake. Raw data for carbon fixation was collected in the field and was corrected for biomass (chlorophyll a) and surface area before comparing results between ponds. Two of the ponds differed in type of microbial mat present. One was a benthic mixed community microbial mat while the other was a lift-off mat comprised almost exclusively of the nitrogen fixing bacteria Nostoc. Species composition and community structure were also determined.
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Description: NIWA's Antarctic programs
Geographic Coverage
Spatial coordinates   
  N: -78.0   S: -78.0   E: 165.33   W: 165.33

Temporal Coverage
Start Date: 2005-01-21
Stop Date: 2005-01-29
ISO Topic Category
Data Set Progress
COMPLETE
Originating Center
Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand Supplemental Info
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
Role: TECHNICAL CONTACT
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
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Publications/References
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.
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Creation and Review Dates
DIF Creation Date: 2008-10-05
Last DIF Revision Date: 2008-10-14

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