Monitoring climate change induced desertification of Antarctica using stable isotopic signatures

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Monitoring climate change induced desertification of Antarctica using stable isotopic signatures
Description:
Abstract:
Metadata record for data from AAS (ASAC) project 3219. Public Summary We will use mosses to investigate the changing climate in Antarctica and the implications this has for terrestrial biodiversity. Mosses grow incrementally from the tip, thus shoot sections contain a record of atmospheric carbon corresponding to each growing season, in a similar fashion to tree rings. This method has been used to age East Antarctic mosses and indicates that some individuals are more than 60 years old. Analysing stable isotopes of carbon and oxygen in cell walls tells us how climate has changed around these mosses over time and allows us to determine which sites are drying and becoming inhospitable. Project Objectives Our hypothesis is that the carbon and oxygen isotope composition of bryophytes can be used as a proxy for desertification, inundation and precipitation regimes in Antarctica. We will determine whether stable isotopes of carbon and oxygen in plant tissues can be used as a surrogate for changes in effective growing season by determining whether they provide an accurate record of water availability to moss beds through time. To do this we will: 1) determine if long term water availability is accurately recorded in cell wall delta13C and delta18O signatures of moss, and if 2) short term, within/between season changes in moss submergence are reflected in the delta13C of sugars. In addition we will 3) measure instantaneous fractionation of carbon isotopes during photosynthesis in moss under different water availabilities. Taken from the 2010-2011 Progress Report Progress against objectives: Moss, snow and water samples for Objectives 1 and 3 were collected in February 2011. These were from ASPA136 (Stevenson's Cove and a ridge site near Whitney Pt), on Bailey Peninsula (ASPA135, Science and Red Shed locations) and from Robinson Ridge These samples have all been identified. Objective 2 requires a longer season and was not possible in the time available at Casey. Laboratory activity/analysis: These samples have all been identified at Wollongong Stable isotope analysis is planned for September-October 2011 in Vienna (Bramley-Alves and Robinson). An experiment to investigate the fractionation of mosses under different water availabilities is planned with some of the samples that were collected and transferred to ANU (Bramley-Alves, Robinson and Ball). Jess Bramley-Alves has applied for a 2011 AINSE Postgraduate Research Award, which would provide research funding and access to radiocarbon dating facilities at ANSTO. This will allow us to date the samples and track stable isotope changes over time. Transplant experiment will be conducted and additional samples will be collected in 2011/12 These will be analysed in 2012. Progress to date is excellent given the short season at Casey.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20101001
Ending_Date: 20130331
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 110.0
East_Bounding_Coordinate: 110.5
North_Bounding_Coordinate: -66.0
South_Bounding_Coordinate: -66.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION INDEX
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION > DESERTIFICATION
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MOSSES/HORNWORTS/LIVERWORTS
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS > VEGETATION WATER CONTENT
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: LABORATORY
Theme_Keyword: FIELD INVESTIGATION
Theme_Keyword: Climate Change
Theme_Keyword: Moss
Theme_Keyword: Carbon
Theme_Keyword: Oxygen
Theme_Keyword: BIOTA
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: The full dataset for this project is not yet publicly available. A copy of the species list collated during data collection is available for download from the provided URL.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_3129 when using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: SHARON ROBINSON
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Department of Biological Sciences
Address: University of Wollongong
Address: Northfields Ave
City: WOLLONGONG
State_or_Province: New South Wales
Postal_Code: 2522
Country: Australia
Contact_Voice_Telephone: +61 2 4221 5753
Contact_Facsimile_Telephone: +61 2 4221 4135
Contact_Electronic_Mail_Address: sharonr@uow.edu.au
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The values provided in temporal and spatial coverage are approximate only. Taken from the 2010-2011 Progress Report Difficulties affecting project: Due to flight delays and short time available at Casey we did not collect all the samples we had hoped to and in particular we were not able to collect the full suite of species along water availabilities required. Hence there are some gaps in the sampling that we hope to fill next season. In addition work on Objective 2 was delayed until 2011/12 because it requires a longer season than the 3 weeks available. Given the short time available and the fact that the weather was not ideal at this late stage in the season, we nonetheless collected the bulk of the samples as planned. We had planned that the transplant experiment in Objective 2 would run for 2 years. This will probably not be possible if the project has to end in 2012. Samples were delayed for a long time on RTA and this is not ideal.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
Back to Top
Spatial_Reference_Information:
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: AAS_3129
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Excel
Transfer_Size: 17 kb
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the species list
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 3129
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset
Fees: Free
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20110429
Metadata_Review_Date: 20140110
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: DAVE J. CONNELL
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: dave.connell@aad.gov.au
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Back to Top
[ Update this Record ]


Link to Web Site