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The physiology of Phymatolithon foecundum from Cape Evans
Entry ID: K082_2001_2002_NZ_4


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Summary
Abstract: Phymatolithon foecundum is a coralline growth found in the coastal benthic environment. Benthic surveys indicated that P. foecundum is abundant throughout the deep gradients (10-30m depth). A range of approaches were taken to determine the light vs photosynthesis characteristics of this growth form including both in situ and laboratory experiments. A diving-PAM fluorometer to log photosynthetic yield of a chosen piece of coralline algae attached to a rock was installed and made measurements at 20 minute intervals over a 15 hour period. Three deployments were made at depths of 16-20m. In the laboratory, coralline covered rocks were incubated in -1 °C water and used in two experiements. In the first, the surface of the coralline crust was exposed to irradiance intensities similar to those expected when ice-out occurs. Using a PAM fluorometer, the short term response of yeild vs irradiance characteristics were measured. In the second, oxygen micro-electrodes were installed to measure changes in oxygen gradients in the layer of water above the coralline crust under a range of irradiance conditions. This data will allow prediction of coralline algae to irradiance conditions during ice-free periods.

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Link: VIEW PROJECT HOME PAGE
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Description: LGP-Latitudinal Gradient Project


Parent DIF
This data set description is a member of a collection. The collection is described in
K082_2001_2007_NZ


Geographic Coverage
 N: -77.6347 S: -77.6347  E: 166.4145  W: 166.4145
 Min Depth: 15  Max Depth: 25

Temporal Coverage
Start Date: 2003-10-28
Stop Date: 2003-11-05


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


Science Keywords
OCEANS >OCEAN OPTICS >FLUORESCENCE    [Definition]
OCEANS >OCEAN OPTICS >PHOTOSYNTHETICALLY ACTIVE RADIATION    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS    [Definition]
OCEANS >OCEAN CHEMISTRY >PIGMENTS >CHLOROPHYLL    [Definition]


ISO Topic Category
BIOTA
OCEANS


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
VONDA CUMMINGS
Role: INVESTIGATOR
Phone: +64 7 856 7026
Fax: +64 7 856 0151
Email: v.cummings at niwa.co.nz
Contact Address:
NIWA
PO Box 11-115
City: Hamilton
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
Schwarz, A-M. Hawes, I. Andrew, N. Norkko, A. Cummings, V. Thrush, S. Macroalgal photosynthesis near southern global limit for growth; Cape Evans, Ross Sea, Antarctica. Polar biology 26: 789-799, 2003.

Creation and Review Dates
DIF Creation Date: 2005-10-11
Last DIF Revision Date: 2008-04-22


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