Heard Island: Terrestrial Biology: Documenting vegetation change on Heard Island.
Entry ID: ASAC_1181

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Summary
Abstract: 2000-01 fieldwork undertaken

Heard Island 53 deg. 05 min. S., 73 deg. 30 min. E. Field area covered: southeast end of island from Long Beach to Gilchrist Beach. 150 GPS control points collected on 1986-1987 airphotos, using handheld GPS unit. To be used for a vegetation mapping project in progress for mapping of Heard Island vegetation communities, along with vegetation quadrat data covering major plant communities of the island. Vegetation quadrat data collected on monitoring sites set up in 1987 to record changes in vegetation, especially the grass Poa annua. Fixed photo-points re-photographed to record aspects of vegetation and glacier-front changes over 12 years. Heard Island environments are changing steadily as global climate change occurs. This project gathered information that will enable completion of a vegetation map for Heard Island; revisited sites studied and marked in 1987 to document changes in vegetation, including colonisation of recently deglaciated land; and provided advice for visitor management protocols to minimise vegetation disturbance. The parts of the island visited were surveyed for new species that may be recently arrived or previously unrecorded, and changes in species which had limited distribution in 1987 were documented.

2003-04 fieldwork undertaken

The fieldwork provides strong evidence of vegetation and habitat changes over the past 16 years, and a sound basis for future monitoring in a dynamic environment sensitive to global change. Work included documentation of 200 photopoints, mapping of limited-distribution plant species, and ground-checking of vegetation mapping from 1987. A solid baseline of 1987 data (photopoints, fixed transects) was remeasured. A new vascular plant species was recorded, Leptinella plumosa, increasing the vascular species list to 12. Differential GPS allowed precise documentation of 200 mapping control points for AADC and accurate locations of all photopoints, species mapping and fixed transects.

Descriptions of data collected for each JJS Data dictionary feature, and additional attributes, are included in metadata notes (word docs) accompanying the DGPS data.

The data associated with this metadata record are as follows:

a) Differential GPS data. The DGPS data in (b) and (c) below originate from these data.

i) Corrected data (Trimble)
ii) Uncorrected data (Trimble)
iii) Shapefiles of the corrected data with original data dictionary IDs
iv) Metadata notes (word doc) for Trimble files

b) Control point data

i) Shapefile of DGPS control points
ii) Metadata notes (word doc) for DGPS control points
iii) Excel file of hand-held control points 2000
iv) Metadata notes (word doc) for hand-held control points 2000
v) Excel file of hand-held control points 2003
vi) Metadata notes (word doc) for hand-held control points 2003

c) Vegetation and miscellaneous data

i) Five shapefiles of DGPS locations for vegetation data and miscellaneous features
ii) One shapefile of hand-held GPS locations for vegetation data.
iii) Metadata notes (word doc) for veg. and misc. data

Related URL
Link: GET DATA
Description: Heard Island differential GPS data collected during the 2003/04 expedition.
Includes uncorrected data, corrected data, shapefiles and additional
information.


Link: GET DATA
Description: Heard Island GPS control point data collected during the 2000/01 and 2003/04
expeditions. Includes a shapefile, two spreadsheets and additional information.


Link: GET DATA
Description: Heard Island vegetation data and miscellaneous features collected by
differential GPS during the 2003/04 expedition. Includes five shapefiles and
additional information.


Link: GET SERVICE
Description: SCAR Feature Catalogue


Link: GET SERVICE
Description: Australian Antarctic Data Centre feedback-request database


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 1181


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


This data set description is a member of a collection. Click to see members of this collection.

Geographic Coverage
 N: -53.0 S: -53.0  E: 74.0  W: 73.0

Temporal Coverage
Start Date: 2000-10-01
Stop Date: 2000-11-01

Start Date: 2003-12-01
Stop Date: 2004-02-01


Location Keywords
OCEAN > SOUTHERN OCEAN
GEOGRAPHIC REGION > POLAR
OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >ISLANDS    [Definition]
BIOSPHERE >VEGETATION >DOMINANT SPECIES    [Definition]
BIOSPHERE >VEGETATION >INDIGENOUS VEGETATION    [Definition]
BIOSPHERE >VEGETATION >VEGETATION COVER    [Definition]
BIOSPHERE >VEGETATION >VEGETATION INDEX    [Definition]
BIOSPHERE >VEGETATION >VEGETATION SPECIES    [Definition]


ISO Topic Category
BIOTA
IMAGERY/BASE MAPS/EARTH COVER


Quality
Hand-held GPS data

Control points were collected in 2000 (between Gilchrist beach, Spit, Long Beach and Cape Gazert) and in 2003-04 (between Compton Lagoon, Spit and Long Beach, and Laurens Peninsula/Atlas Cove area) using Garmin Etrex hand-held GPS units.

Differential GPS data

Positional data were collected from areas between Long Beach and Compton Lagoon Spit (Heard Island) using Global Positioning System (GPS) equipment (Trimble GeoXT CE series handheld GPS units) and standard observational techniques. The collection of positional data were undertaken between 31-12-2003 and 21-2-2004.

The GeoXT units are mapping grade, single frequency receivers capable of decimetre accuracies over short baselines (less than 5 km). GPS data were collected by Jenny Scott (JJS), Robb Clifton (RC) and Justine Shaw (JDS). Between the 30-12-2003 and 21-2-2004 a Trimble ProXR receiver operating as a base station was used. At Heard Island, the receiver was located beside a Geoscience Australia receiver set up at the AUS094 survey mark, Spit Bay Camp. The survey mark is situated on a rock stack behind the base camp at 10.869 m asl. The baseline distance between the mobile receivers at the Sooty Valley field site and Spit Bay camp was less than 5 km. The base station logged data at 5 second intervals.

Post processing of the GeoXT data were acheived using Trimble GPS Pathfinder Office (2002). Results from GPS processing were exported to shapefile format. Each datafile is represented in two forms. Files with the extension SSF (standard storage format) have been downloaded from the GPS unit. All SSF files are data files and are stored in the latitude/longitude coordinate system, using the WGS84 horizontal datum. Files with the extension COR are corrected data files (SSF). COR files are the end product of differential correction of SSF files in GPS Pathfinder Office 2.90, Trimble Navigation Limited.

A data dictionary was set up (PAMT) using the SCAR Feature Catalogue (refer to link below) and GPS Pathfinder (r) Office 2.90, Trimble Navigation Limited. This Data dictionary is called JJS.ddf (JJS_1.txt) and includes the following features:
Points: Control NEW, Control OLD, Photo, Quadrat, Other, Site Record.
Lines: Transect, Other.
Areas: Veg area, Other.
Additional attributes for these features have been added to each record (both in the .ssf files and the final corrected data) and are described below.

Some attributes were added to the corrected control point data. The point locations have been pinpointed and marked on hardcopies of the 1987 aerial imagery and 2003 satellite imagery held by the AADC.

The control point data collected using the Trimble GeoXT CE series GPS units are available for downloading (refer to link below). Included are the uncorrected Trimble files, the differentially corrected Trimble files, the differentially corrected control points in shapefile format and some additional metadata.

Some additional control point data collected at the western end of Heard Island between December 2003 and February 2004 using handheld Garmin Etrex GPS receivers are also available for download (refer to link below). Values provided in temporal coverage are approximate only.


Access Constraints
These data are publicly available for download. If you are interested in downloading data associated with this metadata record, please log a request with the Australian Antarctic Data Centre via the feedback/request database at the URL given below.


Use Constraints
This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).


Keywords
AERIAL PHOTOGRAPHY
GPS
VEGETATION MAPPING


Data Set Progress
COMPLETE


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 7.6 MB
Distribution_Format: shapefiles
Fees: free


Personnel
JAMES KIRKPATRICK
Role: INVESTIGATOR
Phone: +61 3 6226 2460
Fax: +61 3 6226 2989
Email: J.Kirkpatrick at utas.edu.au
Contact Address:
SCHOOL OF GEOGRAPHY AND ENVIRONMENTAL STUDIES
University of Tasmania
PRIVATE BAG 78
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


JENNIFER SCOTT
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6226 2205
Fax: +61 3 6226 2989
Email: jenny.scott at utas.edu.au
Contact Address:
SCHOOL OF GEOGRAPHY AND ENVIRONMENTAL STUDIES
University of Tasmania
PRIVATE BAG 78
City: HOBART
Province or State: Tasmania
Postal Code: 7001
Country: Australia



Creation and Review Dates
DIF Creation Date: 2000-08-10
Last DIF Revision Date: 2014-01-10

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