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.
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:
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
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
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.
Creation and Review Dates
DIF Creation Date:
2008-10-05
Last DIF Revision Date:
2008-10-14
