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

Christophe Fontanier*, Briony Mamo, Samuel Toucanne, Germain Bayon, Sabine Schmidt, Bruno Deflandre, Bernard Dennielou, Gwenael Jouet, Eline Garnier, Saburo Sakai, Ruth Martinez Lamas, Pauline Duros, Takashi Toyofuku, Aurélien Salé, Déborah Belleney, Sabrina Bichon, Audrey Boissier, Sandrine Chéron, Mathilde Pitel, Angélique RoubiMickaël Rovere, Antoine Grémare, Stéphanie Dupré, Stéphan J. Jorry

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)93–100
Number of pages8
JournalDeep-Sea Research Part I: Oceanographic Research Papers
Publication statusPublished - Jan 2018
Externally publishedYes


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


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