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Assessing reef island response to environmental conditions on the GBR

Conference Paper


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Abstract


  • Reef island cays form through the deposition of sediment as a result of wave trains converging across

    reef platforms and, at the regional scale, are influenced by a range of oceanographic and physical environmental

    factors. Preliminary results of a spatial modeling exercise applied to 103 reef islands are presented,

    demonstrating that variation in island area and volume can be accurately expressed as a function of latitudinal

    and cross-shelf gradients in regional oceanographic factors (exposure to incident waves, tidal range and the

    frequency of tropical cyclones) and local physical factors (position on the shelf, area of supporting reef platform,

    area of vegetative cover). This morphometric autoregressive model reveals important differences in the

    response of unvegetated cays, vegetated cays and low wooded islands to their local environmental conditions.

    The empirical relationships defined could further be used to simulate future island accretionary and erosional

    dynamics, and consequent vulnerability given information on anticipated environmental changes.

Publication Date


  • 2012

Citation


  • Hamylton, S. & Puotinen, M. (2012). Assessing reef island response to environmental conditions on the GBR. In D. Yellowlees & T. P. Hughes (Eds.), Proceedings of the 12th International coral Reef Symposium (pp. 1-5). Australia: James Cook University.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2624&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/1606

Start Page


  • 1

End Page


  • 5

Place Of Publication


  • http://www.icrs2012.com/Proceedings.htm

Abstract


  • Reef island cays form through the deposition of sediment as a result of wave trains converging across

    reef platforms and, at the regional scale, are influenced by a range of oceanographic and physical environmental

    factors. Preliminary results of a spatial modeling exercise applied to 103 reef islands are presented,

    demonstrating that variation in island area and volume can be accurately expressed as a function of latitudinal

    and cross-shelf gradients in regional oceanographic factors (exposure to incident waves, tidal range and the

    frequency of tropical cyclones) and local physical factors (position on the shelf, area of supporting reef platform,

    area of vegetative cover). This morphometric autoregressive model reveals important differences in the

    response of unvegetated cays, vegetated cays and low wooded islands to their local environmental conditions.

    The empirical relationships defined could further be used to simulate future island accretionary and erosional

    dynamics, and consequent vulnerability given information on anticipated environmental changes.

Publication Date


  • 2012

Citation


  • Hamylton, S. & Puotinen, M. (2012). Assessing reef island response to environmental conditions on the GBR. In D. Yellowlees & T. P. Hughes (Eds.), Proceedings of the 12th International coral Reef Symposium (pp. 1-5). Australia: James Cook University.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2624&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/1606

Start Page


  • 1

End Page


  • 5

Place Of Publication


  • http://www.icrs2012.com/Proceedings.htm