4.5 Article

Are deep-sea ecosystems surrounding Madagascar threatened by land-use or climate change?

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr.2017.11.011

关键词

Multidisciplinary study; Benthic foraminifera; Land-use; Tropical cyclones

资金

  1. TOTAL
  2. Ifremer
  3. ECOBIOC Team from the laboratory Environnements et Paleo-environnements Oceaniques et Continentaux, University of Bordeaux [UMR 5805]

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In this short communication, we present a multidisciplinary study of sedimentary records collected from a deep-sea interfluve proximal to the mouths of major northwestern Madagascan rivers. For the last 60 years, the seafloor has been repeatedly disturbed by the deposition of organic rich, tropical, terrestrial sediments causing marked reductions in benthic biodiversity. Increased soil erosion due to local land-use, deforestation and intensifying tropical cyclones are potential causes for this sedimentary budget and biodiversity shift. Our marine sedimentary records indicate that until now, these conditions have not occurred within the region for at least 20,000 years.

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