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

Type Article
Date 2018-01
Language English
Author(s) Fontanier Christophe1, 2, 3, 4, Mamo Briony5, Toucanne SamuelORCID3, Bayon Germain3, Schmidt Sabine2, Deflandre Bruno2, Dennielou BernardORCID3, Jouet Gwenael3, Garnier Eline3, Sakai Saburo6, Lamas Ruth Martinez3, Duros Pauline2, 3, Toyofuku Takashi6, Sale Aurelien3, Belleney Deborah3, Bichon Sabrina2, Boissier AudreyORCID3, Cheron Sandrine3, Pitel Mathilde3, Roubi Angelique3, Rovere Mickael3, Gremare Antoine2, Dupre StephanieORCID3, Jorry StephanORCID3
Affiliation(s) 1 : Univ Bordeaux, CNRS, Environm & Paleoenvironm Ocean & Continentaux, UMR 5805, F-33600 Pessac, France.
2 : FORAM, Res Grp, F-49140 Villeveque, France.
3 : IFREMER, Unite Geosci Marines, Ctr Brest, BP 70, F-29280 Plouzane, France.
4 : Univ Angers, F-49035 Angers, France.
5 : Univ Hong Kong, Dept Biol Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
6 : Japan Agcy Marine Earth Sci & Technol JAMSTEC, Inst Biogeosci, 2-15 Natsushima Cho, Yokosuka, Kanagawa 2370061, Japan.
Source Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Pergamon-elsevier Science Ltd), 2018-01 , Vol. 131 , P. 93-100
DOI 10.1016/j.dsr.2017.11.011
WOS© Times Cited 2
Keyword(s) Multidisciplinary study, Benthic foraminifera, Land-use, Tropical cyclones
Abstract

In this short communication, we present a multidisciplinaty 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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Fontanier Christophe, Mamo Briony, Toucanne Samuel, Bayon Germain, Schmidt Sabine, Deflandre Bruno, Dennielou Bernard, Jouet Gwenael, Garnier Eline, Sakai Saburo, Lamas Ruth Martinez, Duros Pauline, Toyofuku Takashi, Sale Aurelien, Belleney Deborah, Bichon Sabrina, Boissier Audrey, Cheron Sandrine, Pitel Mathilde, Roubi Angelique, Rovere Mickael, Gremare Antoine, Dupre Stephanie, Jorry Stephan (2018). Are deep-sea ecosystems surrounding Madagascar threatened by land-use or climate change? Deep-sea Research Part I-oceanographic Research Papers, 131, 93-100. Publisher's official version : https://doi.org/10.1016/j.dsr.2017.11.011 , Open Access version : https://archimer.ifremer.fr/doc/00413/52488/