Data

Distribution and Dynamics of Vegetation in Relation to Natural Disturbance Factors, Heard and McDonald Islands

Australian Antarctic Division
Peterson, J. and Scott, J. ; PETERSON (DECEASED), JAMES ; SCOTT, JENNIFER
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/ASAC_423&rft.title=Distribution and Dynamics of Vegetation in Relation to Natural Disturbance Factors, Heard and McDonald Islands&rft.identifier=http://data.aad.gov.au/metadata/ASAC_423&rft.publisher=Australian Antarctic Data Centre&rft.description=Metadata record for data expected ASAC Project 423See the link below for public details on this project.From the abstracts of the referenced papers:Eight species of vascular plants were previously known from subantarctic Heard Island. three additional species, Montia fontana, Ranunculus biternatus and Poa annua, were discovered during the 1986 austral summer. Details of their habitat and known distribution on the island, and their possible means of arrival, are discussed.The Heard and McDonald Islands are the only subantarctic group which appears to be free of human-introduced animals and plants. Vegetation changes in its species-poor flora are therefore likely to be due to natural factors. Significant glacial recession has exposed new areas for colonisation over the past 40 years. Analysis of vegetation transect data from seven glacier retreat zones and adjacent areas indicates four main patterns of primary colonisation, with moisture availability and effects of animal disturbance being major differentiating environmental factors. Vegetation colonisation can be rapid under the most favourable environmental conditions, for example abundant surface drainage from springs or snow melt with or without effects of nutrient enrichment by animals. It can be expected that with continuing climate amelioration and glacial recession, the size of vegetated areas will expand. Changes in distribution of some vascular plant species around the island have been noted and tentatively linked with climatic warming, and additional changes are predicted. Future effects of changing trends in population numbers of animals utilising and interacting with terrestrial vegetation communities are uncertain. Further changes can now be monitored from recently established reference points.Progress Code: completedStatement: Values provided in temporal and spatial coverage are approximate only. See the referenced papers for further information. This record has been updated by staff at the Australian Antarctic Data Centre (rather than the listed investigator), and therefore its accuracy and quality cannot be guaranteed.&rft.creator=Peterson, J. and Scott, J. &rft.creator=PETERSON (DECEASED), JAMES &rft.creator=SCOTT, JENNIFER &rft.date=2000&rft.coverage=westlimit=73.24; southlimit=-53.21; eastlimit=73.90; northlimit=-52.95&rft.coverage=westlimit=73.24; southlimit=-53.21; eastlimit=73.90; northlimit=-52.95&rft_rights=PDF copies of the referenced papers are available for download from the provided URL to AAD staff only.&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=ASAC_423 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=biota&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > EXOTIC VEGETATION&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > INDIGENOUS VEGETATION&rft_subject=EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > INDIGENOUS/NATIVE SPECIES&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > EXOTIC SPECIES&rft_subject=Heard Island&rft_subject=climate change&rft_subject=vascular plants&rft_subject=FIELD SURVEYS&rft_subject=FIELD INVESTIGATION&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS&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

PDF copies of the referenced papers are available for download from the provided URL to AAD staff only.

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=ASAC_423 when using these data.

This metadata record is publicly available.

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Metadata record for data expected ASAC Project 423
See the link below for public details on this project.

From the abstracts of the referenced papers:

Eight species of vascular plants were previously known from subantarctic Heard Island. three additional species, Montia fontana, Ranunculus biternatus and Poa annua, were discovered during the 1986 austral summer. Details of their habitat and known distribution on the island, and their possible means of arrival, are discussed.

The Heard and McDonald Islands are the only subantarctic group which appears to be free of human-introduced animals and plants. Vegetation changes in its species-poor flora are therefore likely to be due to natural factors. Significant glacial recession has exposed new areas for colonisation over the past 40 years. Analysis of vegetation transect data from seven glacier retreat zones and adjacent areas indicates four main patterns of primary colonisation, with moisture availability and effects of animal disturbance being major differentiating environmental factors. Vegetation colonisation can be rapid under the most favourable environmental conditions, for example abundant surface drainage from springs or snow melt with or without effects of nutrient enrichment by animals. It can be expected that with continuing climate amelioration and glacial recession, the size of vegetated areas will expand. Changes in distribution of some vascular plant species around the island have been noted and tentatively linked with climatic warming, and additional changes are predicted. Future effects of changing trends in population numbers of animals utilising and interacting with terrestrial vegetation communities are uncertain. Further changes can now be monitored from recently established reference points.

Lineage

Progress Code: completed
Statement: Values provided in temporal and spatial coverage are approximate only. See the referenced papers for further information. This record has been updated by staff at the Australian Antarctic Data Centre (rather than the listed investigator), and therefore its accuracy and quality cannot be guaranteed.

Data time period: 1986-09-30 to 1995-03-31

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73.9,-52.95 73.9,-53.21 73.24,-53.21 73.24,-52.95 73.9,-52.95

73.57,-53.08

text: westlimit=73.24; southlimit=-53.21; eastlimit=73.90; northlimit=-52.95

Subjects
AMD | AMD/AU | CEOS | EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > EXOTIC SPECIES | EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > INDIGENOUS/NATIVE SPECIES | EARTH SCIENCE > BIOSPHERE > VEGETATION > EXOTIC VEGETATION | EARTH SCIENCE > BIOSPHERE > VEGETATION > INDIGENOUS VEGETATION | EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER | FIELD INVESTIGATION | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | Heard Island | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS | biota | climate change | vascular plants |

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Other Information
Public information for ASAC project 423 (PROJECT HOME PAGE)

uri : https://projects.aad.gov.au/search_projects_results.cfm?project_no=423

Download point for the data - pdf copies of referenced papers (VIEW RELATED INFORMATION)

uri : http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=2356

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

uri : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_423

Identifiers
  • global : ASAC_423