Data

Global change, biodiversity and conservation in terrestrial and coastal ecosystems on Heard and McDonald Islands

Name: Global change, biodiversity and conservation in terrestrial and coastal ecosystems on Heard and McDonald Islands
Published: 2000-08-10

Australian Antarctic Data Centre

DAVIES, KENDI FARRELL ; MELBOURNE, BRETT ANDREW

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/15/552753F602095&rft.title=Global change, biodiversity and conservation in terrestrial and coastal ecosystems on Heard and McDonald Islands&rft.identifier=10.4225/15/552753F602095&rft.publisher=Australian Antarctic Data Centre&rft.description=Metadata record for data from ASAC Project 1180 Global change, biodiversity and conservation in terrestrial and coastal ecosystems on Heard and McDonald Islands: statistical models for monitoring and predicting effects of climate change and local human impacts on invertebrates. We identified the major environmental variables as altitude and vegetation type. We selected sites for sampling by designing a stratified survey that sampled along gradients of altitude and vegetation type. We included 60 sites in the survey design, distributed across Heard Island in five areas or blocks: Round Hill, Scarlet Hill, Cape Lockyer, Long Beach and Mt Drygowski. This level of sampling was achievable within the five-month period and was sufficient to produce reliable statistical models of invertebrate distribution in the subantarctic (Davies and Melbourne, 1999). We included altitude as a continuous variable (i.e. altitude was measured to +/- 5 meters). For the purpose of getting a reasonably balanced design and for selecting sites we defined altitude classes as: 0-100 m, 100-200 m, 200 - 300 m, 300 - 400 m, 400-500 m, 500-600 m, 600 m +. We included five vegetation categories, which were not meant to cover all kinds of vegetation but instead span the range of vegetation types. Our vegetation classes were Poa cookii dominated (greater than 75%), Pringlea dominated (greater than 75%), Azorella dominated (greater than 75%), feldmark (less than 50% vegetation but with the vegetation that is present consisting of at least 50% moss), and 'patchy Azorella' (50-75% Azorella but less than 75% total vegetation). Not all vegetation classes occurred at all altitudes so we have crossed vegetation with altitude to give roughly 13-16 altitude-vegetation combinations. At most we managed to find between 10-13 sites in each of five areas giving us a total of 60 sites. At all of our sites, we took pitfall samples, and at a selected subset of sites (20 sites) we did hand searches to get density estimates. The trapping took place between January and March 2001. The species that we trapped were: Anatalanta aptera, Myro kerguelenensis, Canonopsis sericeus, Ectemnorhinus viridis, Bothrometopus brevis, Bothrometopus gracilipes, Notodiscus hookeri, Embryonopsis halticella, Calycopteryx mosleyi, Amalopteryx maritima. We produced statistical models that describe the distribution of these species over Heard Island, based on altitude and vegetation type. We took standardised photographs of a 10 m transect at each of our 60 sample sites. These will allow us to look for changes in vegetation composition at these sites in the future. The photographs are in a digital format. The fields in this dataset are: Region Altitude Site Code Slope Aspect Latitude Longitude Dirt Species Date Time Vegetation Type Sample Number&rft.creator=DAVIES, KENDI FARRELL &rft.creator=MELBOURNE, BRETT ANDREW &rft.date=2000&rft.coverage=northlimit=-52.95494; southlimit=-53.19781; westlimit=73.23419; eastLimit=73.86383; projection=WGS84&rft.coverage=northlimit=-52.95494; southlimit=-53.19781; westlimit=73.23419; eastLimit=73.86383; projection=WGS84&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_1180 when using these data.&rft_subject=biota&rft_subject=ISLANDS&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=TERRESTRIAL ECOSYSTEMS&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ARACHNIDS&rft_subject=ARTHROPODS&rft_subject=CHELICERATES&rft_subject=INSECTS&rft_subject=HEXAPODS&rft_subject=RANGE CHANGES&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=INDIGENOUS/NATIVE SPECIES&rft_subject=POPULATION DYNAMICS&rft_subject=COMMUNITY STRUCTURE&rft_subject=COMMUNITY DYNAMICS&rft_subject=ASPECT&rft_subject=ALTITUDE&rft_subject=CLIMATE CHANGE&rft_subject=DATE&rft_subject=DIRT&rft_subject=HEARD ISLAND&rft_subject=LONGITUDE&rft_subject=LATITUDE&rft_subject=REGION&rft_subject=SAMPLE NUMBER&rft_subject=SITE CODE&rft_subject=SOUTHERN OCEAN&rft_subject=SLOPE&rft_subject=SPECIES&rft_subject=TIME&rft_subject=VEGETATION TYPE&rft_subject=TRAPS&rft_subject=FIELD SURVEYS&rft_subject=OCEAN > SOUTHERN OCEAN > McDonald Islands&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA > McDonald Islands&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data

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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_1180 when using these data.

Access:

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The dataset is available for download from the provided URL. A number of images were also captured during this project. Currently these are available on request from Kendi Davies or Brett Melbourne.

Brief description

Metadata record for data from ASAC Project 1180 Global change, biodiversity and conservation in terrestrial and coastal ecosystems on Heard and McDonald Islands: statistical models for monitoring and predicting effects of climate change and local human impacts on invertebrates. We identified the major environmental variables as altitude and vegetation type. We selected sites for sampling by designing a stratified survey that sampled along gradients of altitude and vegetation type. We included 60 sites in the survey design, distributed across Heard Island in five areas or blocks: Round Hill, Scarlet Hill, Cape Lockyer, Long Beach and Mt Drygowski. This level of sampling was achievable within the five-month period and was sufficient to produce reliable statistical models of invertebrate distribution in the subantarctic (Davies and Melbourne, 1999). We included altitude as a continuous variable (i.e. altitude was measured to +/- 5 meters). For the purpose of getting a reasonably balanced design and for selecting sites we defined altitude classes as: 0-100 m, 100-200 m, 200 - 300 m, 300 - 400 m, 400-500 m, 500-600 m, 600 m +. We included five vegetation categories, which were not meant to cover all kinds of vegetation but instead span the range of vegetation types. Our vegetation classes were Poa cookii dominated (greater than 75%), Pringlea dominated (greater than 75%), Azorella dominated (greater than 75%), feldmark (less than 50% vegetation but with the vegetation that is present consisting of at least 50% moss), and 'patchy Azorella' (50-75% Azorella but less than 75% total vegetation). Not all vegetation classes occurred at all altitudes so we have crossed vegetation with altitude to give roughly 13-16 altitude-vegetation combinations. At most we managed to find between 10-13 sites in each of five areas giving us a total of 60 sites. At all of our sites, we took pitfall samples, and at a selected subset of sites (20 sites) we did hand searches to get density estimates. The trapping took place between January and March 2001. The species that we trapped were: Anatalanta aptera, Myro kerguelenensis, Canonopsis sericeus, Ectemnorhinus viridis, Bothrometopus brevis, Bothrometopus gracilipes, Notodiscus hookeri, Embryonopsis halticella, Calycopteryx mosleyi, Amalopteryx maritima. We produced statistical models that describe the distribution of these species over Heard Island, based on altitude and vegetation type. We took standardised photographs of a 10 m transect at each of our 60 sample sites. These will allow us to look for changes in vegetation composition at these sites in the future. The photographs are in a digital format. The fields in this dataset are: Region Altitude Site Code Slope Aspect Latitude Longitude Dirt Species Date Time Vegetation Type Sample Number

Issued: 2000-08-10

Data time period: 2001-01-01 to 2001-03-31

This dataset is part of a larger collection

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text: northlimit=-52.95494; southlimit=-53.19781; westlimit=73.23419; eastLimit=73.86383; projection=WGS84

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536 NLA Link

Identifiers

URI : data.aad.gov.au/metadata/records/ASAC_1180
Local : ASAC_1180
DOI : 10.4225/15/552753F602095
global : 0260c171-2c27-4501-9ef5-a8fcf0a4b341

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