Distribution and Dynamics of Vegetation in Relation to Natural Disturbance Factors, Heard and McDonald IslandsEntry ID: ASAC_423
Abstract: 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.
Data Set Citation
Dataset Originator/Creator: Peterson, J. and Scott, J.
Dataset Title: Distribution and Dynamics of Vegetation in Relation to Natural Disturbance Factors, Heard and McDonald Islands
Dataset Series Name: CAASM Metadata
Dataset Publisher: Australian Antarctic Data CentreOnline Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 1986-09-30Stop Date: 1995-03-31
BIOSPHERE > VEGETATION > EXOTIC VEGETATION
BIOSPHERE > VEGETATION > INDIGENOUS VEGETATION
BIOSPHERE > VEGETATION > VEGETATION COVER
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > INDIGENOUS/NATIVE SPECIES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > EXOTIC SPECIES
ISO Topic Category
Quality 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.
Access Constraints PDF copies of the referenced papers are available for download from the provided URL to AAD staff only.
Use Constraints This data set conforms to the PICCCBY Attribution License
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.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 3.2 MB
Distribution Format: pdf
Role: TECHNICAL CONTACT
Phone: +61 3 6226 2205
Fax: +61 3 6226 2989
Email: jenny.scott at utas.edu.au
SCHOOL OF GEOGRAPHY AND ENVIRONMENTAL STUDIES University of Tasmania PRIVATE BAG 78
Province or State: Tasmania
Postal Code: 7001
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Scott J.J. (1989), New records of vascular plants from Heard Island., Polar Record, 25, 152, 37-42
Scott J.J. (1990), Changes in vegetation on Heard Island 1947-1987., Antarctic Ecosystems: Ecological Change and Conservation., 61-76
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-07-28
Last DIF Revision Date: 2016-11-18