Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change
Plot data and satellite imagery were used to examine changes in vegetation between 2000 and 2007. These data were examined in light of changes in rabbit numbers (data owned by and provided to the Australian Antarctic Division from Parks and Wildlife Tasmania). Vegetation Change. Kate Kiefer establis...
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Australian Antarctic Data Centre
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Online Access: | https://researchdata.ands.org.au/changes-vegetation-macquarie-2007-asac3095vegetationchange/700130 https://doi.org/10.4225/15/54AF6188BF01D https://data.aad.gov.au/metadata/records/ASAC_3095_Vegetation_Change http://nla.gov.au/nla.party-617536 |
id |
ftands:oai:ands.org.au::700130 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota environment DOMINANT SPECIES EARTH SCIENCE BIOSPHERE VEGETATION INDIGENOUS VEGETATION RECLAMATION/REVEGETATION/RESTORATION VEGETATION COVER VEGETATION INDEX VEGETATION SPECIES QUADRATS FIELD INVESTIGATION FIELD SURVEYS OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota environment DOMINANT SPECIES EARTH SCIENCE BIOSPHERE VEGETATION INDIGENOUS VEGETATION RECLAMATION/REVEGETATION/RESTORATION VEGETATION COVER VEGETATION INDEX VEGETATION SPECIES QUADRATS FIELD INVESTIGATION FIELD SURVEYS OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
topic_facet |
biota environment DOMINANT SPECIES EARTH SCIENCE BIOSPHERE VEGETATION INDIGENOUS VEGETATION RECLAMATION/REVEGETATION/RESTORATION VEGETATION COVER VEGETATION INDEX VEGETATION SPECIES QUADRATS FIELD INVESTIGATION FIELD SURVEYS OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Plot data and satellite imagery were used to examine changes in vegetation between 2000 and 2007. These data were examined in light of changes in rabbit numbers (data owned by and provided to the Australian Antarctic Division from Parks and Wildlife Tasmania). Vegetation Change. Kate Kiefer established 18 relatively homogenous plots of 25 m2 in a range of vegetation types between November and March 2001. Individual plant species cover was visually calculated within five random 1m2 quadrats within each site and mean values determined. Dana Bergstrom, Kate Kiefer, Jane Wasley and Arko Lucieer re-sampled the same sites in April 2007. The data matrix consisted of 18 sites, 34 taxa and temporally separated sampling intervals: 2001 and 2007. Species also included collective categories for leafy bryophytes, lichens, bare ground and dead vegetation. At each site, altitude, slope, aspect, a subjective estimate of the wind exposure and the degree of waterlogging were also recorded. The data matrix of sites and mean cover for the site (mean of cover from 5 x 1 m2 quadrats) is provided. Also in the data matrix is a GPS location of the site which is recorded for each star picket that marks each site on the island. Site code consists of site number (first two numerals) - year 01 or 07 (2001 or 2007). The data matrix also includes some site information: a subjective exponential soil-water scale (1- 5: dry - wet); a subjective exponential site exposure scale (1-5: sheltered to exposed); slope, altitude, aspect and mean substrate depth (mean of three random probes across the site). Remote Sensing Imagery. Information on changes in vegetation communities were scaled up to whole-island level using satellite imagery. We used Landsat ETM+ imagery acquired on 12 December 2000 and Quickbird imagery acquired on 15 March 2007 to detect changes in vegetation cover on Macquarie Island. The Quickbird image with its 2.4 m pixel size was resampled (by pixel averaging) to the 25 m Landsat pixel size to compare the images at the same resolution. The images were orthorectified to correct terrain and geometric distortions. Radiometric, illumination, and atmospheric differences were also corrected. These corrections are crucial for change detection algorithms as false changes are often introduced by geometric offsets and shadowing effects. Multispectral bands 1 (blue), 2 (green), 3 (red), and 4 (near-infrared (NIR)) of both images were used for change detection. |
author2 |
BERGSTROM, DANA M. (hasPrincipalInvestigator) BERGSTROM, DANA M. (processor) KIEFER, KATE (processor) WASLEY, JANE (processor) LUCIEER, ARKO (processor) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
title_short |
Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
title_full |
Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
title_fullStr |
Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
title_full_unstemmed |
Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change |
title_sort |
changes in vegetation on macquarie island 2000 to 2007 - asac_3095_vegetation_change |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/changes-vegetation-macquarie-2007-asac3095vegetationchange/700130 https://doi.org/10.4225/15/54AF6188BF01D https://data.aad.gov.au/metadata/records/ASAC_3095_Vegetation_Change http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-54.62; southlimit=-54.62; westlimit=158.861; eastLimit=158.861; projection=WGS84 Temporal: From 2000-11-01 to 2007-04-30 |
long_lat |
ENVELOPE(158.861,158.861,-54.62,-54.62) |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Australian Antarctic Division Macquarie Island Southern Ocean |
genre_facet |
Antarc* Antarctic Australian Antarctic Division Macquarie Island Southern Ocean |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/changes-vegetation-macquarie-2007-asac3095vegetationchange/700130 0afe25f8-5543-4950-a0a3-fa069976e2fa doi:10.4225/15/54AF6188BF01D ASAC_3095_Vegetation_Change https://data.aad.gov.au/metadata/records/ASAC_3095_Vegetation_Change http://nla.gov.au/nla.party-617536 |
op_doi |
https://doi.org/10.4225/15/54AF6188BF01D |
_version_ |
1766245886210342912 |
spelling |
ftands:oai:ands.org.au::700130 2023-05-15T13:46:57+02:00 Changes in vegetation on Macquarie Island 2000 to 2007 - ASAC_3095_Vegetation_Change BERGSTROM, DANA M. (hasPrincipalInvestigator) BERGSTROM, DANA M. (processor) KIEFER, KATE (processor) WASLEY, JANE (processor) LUCIEER, ARKO (processor) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-54.62; southlimit=-54.62; westlimit=158.861; eastLimit=158.861; projection=WGS84 Temporal: From 2000-11-01 to 2007-04-30 https://researchdata.ands.org.au/changes-vegetation-macquarie-2007-asac3095vegetationchange/700130 https://doi.org/10.4225/15/54AF6188BF01D https://data.aad.gov.au/metadata/records/ASAC_3095_Vegetation_Change http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/changes-vegetation-macquarie-2007-asac3095vegetationchange/700130 0afe25f8-5543-4950-a0a3-fa069976e2fa doi:10.4225/15/54AF6188BF01D ASAC_3095_Vegetation_Change https://data.aad.gov.au/metadata/records/ASAC_3095_Vegetation_Change http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre biota environment DOMINANT SPECIES EARTH SCIENCE BIOSPHERE VEGETATION INDIGENOUS VEGETATION RECLAMATION/REVEGETATION/RESTORATION VEGETATION COVER VEGETATION INDEX VEGETATION SPECIES QUADRATS FIELD INVESTIGATION FIELD SURVEYS OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands https://doi.org/10.4225/15/54AF6188BF01D 2020-01-05T21:17:10Z Plot data and satellite imagery were used to examine changes in vegetation between 2000 and 2007. These data were examined in light of changes in rabbit numbers (data owned by and provided to the Australian Antarctic Division from Parks and Wildlife Tasmania). Vegetation Change. Kate Kiefer established 18 relatively homogenous plots of 25 m2 in a range of vegetation types between November and March 2001. Individual plant species cover was visually calculated within five random 1m2 quadrats within each site and mean values determined. Dana Bergstrom, Kate Kiefer, Jane Wasley and Arko Lucieer re-sampled the same sites in April 2007. The data matrix consisted of 18 sites, 34 taxa and temporally separated sampling intervals: 2001 and 2007. Species also included collective categories for leafy bryophytes, lichens, bare ground and dead vegetation. At each site, altitude, slope, aspect, a subjective estimate of the wind exposure and the degree of waterlogging were also recorded. The data matrix of sites and mean cover for the site (mean of cover from 5 x 1 m2 quadrats) is provided. Also in the data matrix is a GPS location of the site which is recorded for each star picket that marks each site on the island. Site code consists of site number (first two numerals) - year 01 or 07 (2001 or 2007). The data matrix also includes some site information: a subjective exponential soil-water scale (1- 5: dry - wet); a subjective exponential site exposure scale (1-5: sheltered to exposed); slope, altitude, aspect and mean substrate depth (mean of three random probes across the site). Remote Sensing Imagery. Information on changes in vegetation communities were scaled up to whole-island level using satellite imagery. We used Landsat ETM+ imagery acquired on 12 December 2000 and Quickbird imagery acquired on 15 March 2007 to detect changes in vegetation cover on Macquarie Island. The Quickbird image with its 2.4 m pixel size was resampled (by pixel averaging) to the 25 m Landsat pixel size to compare the images at the same resolution. The images were orthorectified to correct terrain and geometric distortions. Radiometric, illumination, and atmospheric differences were also corrected. These corrections are crucial for change detection algorithms as false changes are often introduced by geometric offsets and shadowing effects. Multispectral bands 1 (blue), 2 (green), 3 (red), and 4 (near-infrared (NIR)) of both images were used for change detection. Dataset Antarc* Antarctic Australian Antarctic Division Macquarie Island Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean ENVELOPE(158.861,158.861,-54.62,-54.62) |