Data

Monitoring climate change induced desertification of Antarctica using stable isotopic signatures - species list

Australian Antarctic Division
Robinson, S. ; ROBINSON, SHARON
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/AAS_3129&rft.title=Monitoring climate change induced desertification of Antarctica using stable isotopic signatures - species list&rft.identifier=http://data.aad.gov.au/metadata/AAS_3129&rft.publisher=Australian Antarctic Data Centre&rft.description=Metadata record for data from AAS (ASAC) project 3219.Public SummaryWe 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 ObjectivesOur 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 if2) short term, within/between season changes in moss submergence are reflected in the delta13C of sugars. In addition we will3) measure instantaneous fractionation of carbon isotopes during photosynthesis in moss under different water availabilities.Taken from the 2010-2011 Progress ReportProgress 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 RidgeThese 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 WollongongStable 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 2011/12These will be analysed in 2012.Progress to date is excellent given the short season at Casey.Progress Code: completedStatement: 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.&rft.creator=Robinson, S. &rft.creator=ROBINSON, SHARON &rft.date=2011&rft.coverage=westlimit=110.14063; southlimit=-66.53233; eastlimit=110.64063; northlimit=-66.03233&rft.coverage=westlimit=110.14063; southlimit=-66.53233; eastlimit=110.64063; northlimit=-66.03233&rft_rights=A copy of the species list collated during data collection is publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). 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.&rft_rights=This metadata record is publicly available.&rft_subject=biota&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES&rft_subject=EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION > DESERTIFICATION&rft_subject=EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MOSSES/HORNWORTS/LIVERWORTS&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS > VEGETATION WATER CONTENT&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION INDEX&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS&rft_subject=Moss&rft_subject=Climate Change&rft_subject=Carbon&rft_subject=Oxygen&rft_subject=VISUAL OBSERVATIONS > VISUAL OBSERVATIONS&rft_subject=FIELD SURVEYS&rft_subject=LABORATORY&rft_subject=FIELD INVESTIGATION&rft_subject=CEOS&rft_subject=AMD/AU&rft_subject=AMD&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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CC-BY

Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

A copy of the species list collated during data collection is publicly available for download from the provided URL.

This data set conforms to the CCBY Attribution License
(http://creativecommons.org/licenses/by/4.0/).

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.

This metadata record is publicly available.

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Full description

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.

Lineage

Progress Code: completed
Statement: 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.

Data time period: 2010-10-01 to 2013-03-31

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110.64063,-66.03233 110.64063,-66.53233 110.14063,-66.53233 110.14063,-66.03233 110.64063,-66.03233

110.39063,-66.28233

text: westlimit=110.14063; southlimit=-66.53233; eastlimit=110.64063; northlimit=-66.03233

Subjects
AMD | AMD/AU | CEOS | CONTINENT > ANTARCTICA | Carbon | Climate Change | EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS | EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS | EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MOSSES/HORNWORTS/LIVERWORTS | EARTH SCIENCE > BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE | EARTH SCIENCE > BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS > VEGETATION WATER CONTENT | EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER | EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION INDEX | EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES | EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION > DESERTIFICATION | FIELD INVESTIGATION | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | LABORATORY | Moss | Oxygen | VISUAL OBSERVATIONS > VISUAL OBSERVATIONS | biota |

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Other Information
Download point for the species list (GET DATA > DIRECT DOWNLOAD)

url : https://data.aad.gov.au/eds/3023/download

Public information for ASAC project 3129 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/report_project_public.cfm?project_no=AAS_3129

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_3129

Identifiers
  • global : AAS_3129