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Predicting the response of coastal wetlands of Southeastern Australia to sea-level rise

Conference Paper


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Abstract


  • Coastal saltmarsh is an endangered ecological community in New South Wales and

    sea-level rise has been listed as a key threatening process. Over the previous five

    decades moderate rates of sea-level rise have coincided with the invasion of saltmarsh

    by mangrove. Surface elevation tables (SETs) were installed in 12 coastal wetlands in

    Southeastern Australia to establish elevation and accretion trajectories for

    comparisons with mangrove encroachment of saltmarsh and sea-level rise. SETs

    confirmed that the elevational response of wetlands is more complex than accretion

    alone and elevation changes may also be attributed to below-ground processes that

    alter the soil volume such as subsidence/compaction, groundwater volume

    fluctuations, and below-ground biomass changes. A simple modelling approach was

    employed to establish a relationship between the observed rate of mangrove

    encroachment of saltmarsh and relative sea-level rise, which incorporates the eustatic

    component of sea-level rise and changes in the marsh elevation. Increasing access to

    high resolution digital elevation models will enhance our capacity to predict the

    response of coastal wetlands to sea-level rise. Long-term datasets of elevation

    dynamics and improved understanding of the feedback mechanisms influencing

    marsh elevations will further enhance our modelling capacity.

Publication Date


  • 2009

Citation


  • Rogers, K. & Saintilan, N. (2009). Predicting the response of coastal wetlands of Southeastern Australia to sea-level rise. 2009 18th NSW Coastal Conference Papers (pp. 1-23). Australia: NSW Coastal Conference.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1717&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/704

Start Page


  • 1

End Page


  • 23

Place Of Publication


  • Australia

Abstract


  • Coastal saltmarsh is an endangered ecological community in New South Wales and

    sea-level rise has been listed as a key threatening process. Over the previous five

    decades moderate rates of sea-level rise have coincided with the invasion of saltmarsh

    by mangrove. Surface elevation tables (SETs) were installed in 12 coastal wetlands in

    Southeastern Australia to establish elevation and accretion trajectories for

    comparisons with mangrove encroachment of saltmarsh and sea-level rise. SETs

    confirmed that the elevational response of wetlands is more complex than accretion

    alone and elevation changes may also be attributed to below-ground processes that

    alter the soil volume such as subsidence/compaction, groundwater volume

    fluctuations, and below-ground biomass changes. A simple modelling approach was

    employed to establish a relationship between the observed rate of mangrove

    encroachment of saltmarsh and relative sea-level rise, which incorporates the eustatic

    component of sea-level rise and changes in the marsh elevation. Increasing access to

    high resolution digital elevation models will enhance our capacity to predict the

    response of coastal wetlands to sea-level rise. Long-term datasets of elevation

    dynamics and improved understanding of the feedback mechanisms influencing

    marsh elevations will further enhance our modelling capacity.

Publication Date


  • 2009

Citation


  • Rogers, K. & Saintilan, N. (2009). Predicting the response of coastal wetlands of Southeastern Australia to sea-level rise. 2009 18th NSW Coastal Conference Papers (pp. 1-23). Australia: NSW Coastal Conference.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1717&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/704

Start Page


  • 1

End Page


  • 23

Place Of Publication


  • Australia