The effects of increased PAR and UV on the xanthophyl cycle of Antarctic ice algae

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: The effects of increased PAR and UV on the xanthophyl cycle of Antarctic ice algae
Description:
Abstract:
The xanthophyll cycle is a photo-protection mechanism in phytoplankton which protects the photosynthestic machinery from damage by high light intensities. Sea ice algae in Antarctica live on the bottom of sea ice often at low irradiances. During sea ice break up, they become exposed to high levels of irradiance. This cycle was investigated in Antarctic sea ice to determine, a) how does the xanthophyll cycle respond to changes in irradiance, b) What is the relationship between the xanthophyll cycle and UV radiation, c) What is the relationship between xanthophyll cycle and the water column light profile? Sea ice algae was collected from Cape Royds and used for experiments in the laboratory. PAR sensors were placed under the ice to measure ambient PAR and UV radiation, algae samples were placed in beakers and covered with plastics of different UV transmissions and others were placed in a series of containers with different neutral density filters. All treatments were samples at various time intervals and the xanthophyll cycle analysed. Samples were also collected for laboratory experiments investigating a) the response of the xanthophyll pigments to changing irradiances, b) the relationship between the xanthophyll cycle and UV radiation and c) experiments with the vertical mixing incubator. The xanthophyll cycle in water column algae was simultaneously measured with measurements of kinetic coefficients for an adaptation to a change in irradiance, estimates of the vertical velocity of marine algael cells within the water column and water column characteristics were measured (CTD, PAR, spectroradiometer, multichannel radiometer and TUVR radiometer).
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Griffith, G. 2007. The photoprotective xanthophyll cycle in Southern Ocean phytoplankton and Antarctic sea-ice algae. PhD thesis, University of Otago, New Zealand. Griffith, G.P., Vennell, R., and Lamare, M.D. 2009. Diadinoxanthic cycle of the bottom ice algal community during spring in McMurdo Sound, Antarctica. Polar Biology 32: 623-636. Griffith, G.P., Vennell, R. and Williams, M.J.M. 2010. An algal photo protection index and vertical mixing in the Southern Ocean. Journal of Plankton Research 32: 515-527.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20051027
Ending_Date: 20051111
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 166.15
East_Bounding_Coordinate: 166.15
North_Bounding_Coordinate: -77.5
South_Bounding_Coordinate: -77.55
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION
Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > PHOTOSYNTHETICALLY ACTIVE RADIATION
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > MARINE HABITAT
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > EVOLUTIONARY ADAPTATION
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
Theme_Keyword: LABORATORY
Theme_Keyword: FIELD INVESTIGATION
Theme_Keyword: CORING DEVICES
Theme_Keyword: CTD > CONDUCTIVITY, TEMPERATURE, DEPTH
Theme_Keyword: PAR SENSORS > PHOTOSYNTHETICALLY ACTIVE RADIATION SENSORS
Theme_Keyword: SPECTRORADIOMETERS
Theme_Keyword: BIOTA
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: CONTINENT > ANTARCTICA > ROSS ISLAND
Place_Keyword: CONTINENT > ANTARCTICA > CAPE ROYDS
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GARY GRIFFITH
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Department of Marine Science
Address: University of Otago
Address: PO Box 56
City: Dunedin
Country: New Zealand
Contact_Voice_Telephone: 00 64 3 4795453
Contact_Facsimile_Telephone: 00 64 3 4798336
Contact_Electronic_Mail_Address: gary.griffith@otago.ac.nz
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NZ/NZAI/ANZ > Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand
Contact_Person: SHULAMIT GORDON
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
Resource_Description: K068_2005_2006_NZ_1
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Not Available
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.antarcticanz.govt.nz/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.otago.ac.nz/marinescience/
Access_Instructions:
The department homepage at the University of Otago
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20090428
Metadata_Review_Date: 20101028
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: CEISHA POIROT
Contact_Person_Primary:
Contact_Person: SHULAMIT GORDON
Contact_Position: DIF AUTHOR
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: c.poirot@antarcticanz.govt.nz
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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