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Human deforestation outweighs future climate change impacts of sedimentation on coral reefs

Author

Listed:
  • Joseph Maina

    (Macquarie University
    Marine Programs, Wildlife Conservation Society)

  • Hans de Moel

    (Faculty of Earth and Life Sciences, Institute of Environmental Studies, VU University Amsterdam)

  • Jens Zinke

    (School of Earth and Environment, Australian Institute of Marine Science, UWA Oceans Institute, University of Western Australia)

  • Joshua Madin

    (Macquarie University)

  • Tim McClanahan

    (Marine Programs, Wildlife Conservation Society)

  • Jan E. Vermaat

    (Faculty of Earth and Life Sciences, Section of Earth Sciences and Economics, VU University Amsterdam)

Abstract

Near-shore coral reef systems are experiencing increased sediment supply due to conversion of forests to other land uses. Counteracting increased sediment loads requires an understanding of the relationship between forest cover and sediment supply, and how this relationship might change in the future. Here we study this relationship by simulating river flow and sediment supply in four watersheds that are adjacent to Madagascar’s major coral reef ecosystems for a range of future climate change projections and land-use change scenarios. We show that by 2090, all four watersheds are predicted to experience temperature increases and/or precipitation declines that, when combined, result in decreases in river flow and sediment load. However, these climate change-driven declines are outweighed by the impact of deforestation. Consequently, our analyses suggest that regional land-use management is more important than mediating climate change for influencing sedimentation of Malagasy coral reefs.

Suggested Citation

  • Joseph Maina & Hans de Moel & Jens Zinke & Joshua Madin & Tim McClanahan & Jan E. Vermaat, 2013. "Human deforestation outweighs future climate change impacts of sedimentation on coral reefs," Nature Communications, Nature, vol. 4(1), pages 1-7, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2986
    DOI: 10.1038/ncomms2986
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    Cited by:

    1. Roberts, Michaela & Cresswell, Will & Hanley, Nick, 2018. "Prioritising Invasive Species Control Actions: Evaluating Effectiveness, Costs, Willingness to Pay and Social Acceptance," Ecological Economics, Elsevier, vol. 152(C), pages 1-8.

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