Heard Island: Terrestrial Biology: Documenting vegetation change on Heard Island.Entry ID: ASAC_1181
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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
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Start Date: 2000-10-01Stop Date: 2000-11-01
Start Date: 2003-12-01Stop Date: 2004-02-01
Latitude Resolution: 0.0417 Decimal degrees
Longitude Resolution: 0.0417 Decimal degrees
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree
Quality The population per grid cell (item Pop) is based upon the population data of Gridded Population of the World, Version 3 (GPWv3). The area per grid cell (Areakm) is calculated by subtracting from the area of the grid cell those areas that are permanently inundated as identified using VMAP (0)/Digital Chart of the World. Building upon a methodology developed by Sachs et al. (2003), a gross domestic ... product (GDP) value (US $2000, purchase power parity adjusted (PPP)) is estimated for each grid cell. The process begins by determining the contribution of each subnational unit to national GDP using data of varied origin. The ratio of the subnational production to the national GDP is the contribution ratio. To ensure uniformity between countries, these contribution ratios are utilized with published World Bank estimates of GDP.
Once a standardized version of subnational GDP had been calculated, this value was further divided by the total population within the subnational unit. This subnational, per-person GDP value was multiplied by the grid cell population density to determine a GDP for the grid cell.
Regional loss rates derived from the historical records of EM-DAT were utilized in conjecture with the vulnerability data within Global Drought Hazard Frequency and Distribution and the GDP per grid cell to assess the total economic loss risks posed by drought hazard. Since the resultant range of economic loss risks varied widely, the natural log was taken before classifying into deciles, 10 classes of approximately an equal number of grid cells.
Access Constraints None
Use Constraints The Trustees of Columbia University in the City of New York, Center for Hazards
and Risk Research, and International Bank for Reconstruction and
... Development/The World Bank hold the copyright of this dataset. Users are
prohibited from any commercial, resale, or redistribution without explicit
written permission from CHRR, CIESIN, and The World Bank. Users should
acknowledge CHRR, CIESIN, and The World Bank as the source used in the creation
of any reports, publications, new datasets, derived products, or services
resulting from the use of this dataset. CHRR, CIESIN, and The World Bank
request reprints of any publications and notification of any redistribution
Data Set Progress
Role: TECHNICAL CONTACT
Phone: +1 845-365-8920
Fax: +1 845-365-8922
Email: ciesin.info at ciesin.columbia.edu
61 Route 9W, P.O. Box 1000
Province or State: NY
Postal Code: 10964
Role: DIF AUTHOR
Phone: +1 845-365-8988
Fax: +1 845-365-8922
Email: metadata at ciesin.columbia.edu
61 Route 9W, P.O. Box 1000
Province or State: New York
Postal Code: 10964
Center for Hazards and Risks Research (CHRR)/Columbia University, Center for International Earth Science Information Network (CIESIN)/Columbia University, and International Research Institute for Climate and Society (IRI)/Columbia University (2005), Global Drought Hazard Frequency and Distribution, Center for Hazards and Risk Research (CHRR)/Columbia University, Palisades, NY, http://sedac.ciesin.columbia.edu/data/set/ndh-drought-hazard-freque...
Center for Hazards and Risk Research (CHRR)/Columbia University, Center for International Earth Science Information Network (CIESIN)/Columbia University, and International Bank for Reconstruction and Development/The World Bank (2005), Global Drought Mortality Risks and Distribution, Center for Hazards and Risk Research (CHRR)/Columbia University, Palisades, NY, http://sedac.ciesin.columbia.edu/data/set/ndh-drought-mortality-ris...
Center for Hazards and Risk Research (CHRR)/Columbia University, Center for International Earth Science Information Network (CIESIN)/Columbia University, and International Bank for Reconstruction and Development/The World Bank (2005), Global Drought Proportional Economic Loss Risk Deciles, Center for Hazards and Risk Research (CHRR)/Columbia University, Palisades, NY, http://sedac.ciesin.columbia.edu/data/set/ndh-drought-proportional-...
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2005-09-29
Last DIF Revision Date: 2013-02-13