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    Linking coral river runoff proxies with climate variability, hydrology and land-use in Madagascar catchments

    Access Status
    Fulltext not available
    Authors
    Maina, J.
    de Moel, H.
    Vermaat, J.
    Bruggemann, J.
    Guillaume, M.
    Grove, C.
    Madin, J.
    Mertz-Kraus, R.
    Zinke, Jens
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Maina, J. and de Moel, H. and Vermaat, J. and Bruggemann, J. and Guillaume, M. and Grove, C. and Madin, J. et al. 2012. Linking coral river runoff proxies with climate variability, hydrology and land-use in Madagascar catchments. Marine Pollution Bulletin. 64 (10): pp. 2047-2059.
    Source Title
    MARINE POLLUTION BULLETIN
    DOI
    10.1016/j.marpolbul.2012.06.027
    ISSN
    0025-326X
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/29468
    Collection
    • Curtin Research Publications
    Abstract

    Understanding the linkages between coastal watersheds and adjacent coral reefs is expected to lead to better coral reef conservation strategies. Our study aims to examine the main predictors of environmental proxies recorded in near shore corals and therefore how linked near shore reefs are to the catchment physical processes. To achieve these, we developed models to simulate hydrology of two watersheds in Madagascar. We examined relationships between environmental proxies derived from massive Porites spp. coral cores (spectral luminescence and barium/calcium ratios), and corresponding time-series (1950–2006) data of hydrology, climate, land use and human population growth. Results suggest regional differences in the main environmental drivers of reef sedimentation: on annual time-scales, precipitation, river flow and sediment load explained the variability in coral proxies of river discharge for the northeast region, while El Niño-Southern Oscillation (ENSO) and temperature (air and sea surface) were the best predictors in the southwest region.

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