MAD-RIDGE-2

Type Oceanographic cruise
Ship Antea
Ship owner IRD
Dates 25/11/2016 - 14/12/2016
Chief scientist(s) TERNON Jean-François ORCID

MARINE BIODIVERSITÉ, EXPLOITATION ET CONSERVATION - UMR - SÈTE

Avenue Jean Monnet

CS 30171

34203 Sète Cedex

33 (0)4 99 57 32 00

https://umr-marbec.fr/
DOI 10.17600/16004900
Objective

The MAD-Ridge cruise has been conducted along the Madagascar Ridge, from the southern tip of Madagascar down to 29°S. This is an area of elevated topography, including seamounts, with strong mesoscale turbulence (eddies) related to the East Madagascar Current and its retroflection. Moreover, this area is considered as an Ecologically and Biologically Significant Area (EBSA) as it shelters a high diversity of pelagic fish, of both temperate and tropical species, some of them being exploited by offshore longline fisheries. This area is also important for marine mammal migration and seabird breeding and feeding. The MAD-Ridge project aims at being an integrated and original study of the eddy-topography interaction processes at a shallow (200m) seamount, and to investigate their impact on the productivity of several biological compartments, from the low trophic levels to the top predator forage fauna.

The MAD-Ridge cruise had two legs. This report is about Leg2 (25 November - 14 December 2016) whose focus in physical oceanography  was on small scale dynamics in the vicinity of the seamount. High resolution sampling tools (Scanfish and turbulence VMP profiler) have been used together with "classical" CTD stations (and one 24h CTD station). In terms of biology, Leg 2 focussed on micronekton (forage fauna for large pelagic fish) which has been sampled using a meso-pelagic trawl, and whose spatio-temporal distribution has been surveyed with multi-frequency acoustic.

MAD-Ridge is an operation of the IIOE-2 project (IOC/UNESCO). The cruise has been partly funded by FFEM (Fonds Français pour l'Environnement Mondial) within the project FFEM-SWIO (2014-2017): Conservation et exploitation durable des écosystèmes profonds du sud ouest de l'Océan Indien au-delà des zones de juridiction nationale.

Scientific context

Data managed by SISMER

Bibliography

Publications

Annasawmy Angelee Pavanee, Menard Frédéric, Marsac Francis, Ternon Jean-Francois, Cherel Yves, Romanov Evgeny, Le Loch Francois (2024). Environmental variability shapes trophic and resource partitioning between epipelagic and mesopelagic biomes in oceanic provinces: Implications in a globally changing ocean. Progress In Oceanography, 229, 103339 (17p.). https://doi.org/10.1016/j.pocean.2024.103339


Annasawmy Pavanee, Bustamante Paco, Point David, Churlaud Carine, Romanov Evgeny V., Bodin Nathalie (2022). Trace elements and δ15N values in micronekton of the south-western Indian Ocean. Marine Pollution Bulletin, 184, 114053 (16p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2022.114053 , Open Access version : https://archimer.ifremer.fr/doc/00811/92284/


Annasawmy Pavanee, Point David, Romanov Evgeny V., Bodin Nathalie (2022). Mercury concentrations and stable isotope ratios (δ13C and δ15N) in pelagic nekton assemblages of the south-western Indian Ocean. Marine Pollution Bulletin, 174, 113151 (16p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2021.113151 , Open Access version : https://archimer.ifremer.fr/doc/00811/92286/


Le Croizier Gaël, Lorrain Anne, Sonke Jeroen E., Jaquemet Sébastien, Schaal Gauthier, Renedo Marina, Besnard Lucien, Cherel Yves, Point David (2020). Mercury isotopes as tracers of ecology and metabolism in two sympatric shark species. Environmental Pollution, 265(Part B), 114931 (11p.). Publisher's official version : https://doi.org/10.1016/j.envpol.2020.114931 , Open Access version : https://archimer.ifremer.fr/doc/00633/74465/


Annasawmy Pavanee, Cherel Yves, Romanov Evgeny V., Le Loch Francois, Ménard Frédéric, Ternon Jean-Francois, Marsac Francis (2020). Stable isotope patterns of mesopelagic communities over two shallow seamounts of the south-western Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104804 (15p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104804 , Open Access version : https://archimer.ifremer.fr/doc/00632/74429/


Annasawmy Pavanee, Ternon Jean-Francois, Lebourges-Dhaussy Anne, Roudaut Gildas, Cotel Pascal, Herbette Steven, Ménard Frédéric, Marsac Francis (2020). Micronekton distribution as influenced by mesoscale eddies, Madagascar shelf and shallow seamounts in the south-western Indian Ocean: An acoustic approach. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104812 (15p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104812 , Open Access version : https://archimer.ifremer.fr/doc/00634/74579/


Roberts Michael J., Ternon Jean-Francois (2020). The MADRidge project ― a major contribution to IIOE2-WIOURI focussing on three shallow seamounts and their pelagic ecosystems in the vicinity of the Madagascar Ridge. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104817 (5p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104817 , Open Access version : https://archimer.ifremer.fr/doc/00635/74694/


Roberts Michael J., Ternon Jean-Francois, Marsac Francis, Noyon Margaux, Payne Andrew I.L. (2020). The MADRidge project: Bio-physical coupling around three shallow seamounts in the South West Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104813 (14p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104813 , Open Access version : https://archimer.ifremer.fr/doc/00632/74427/


Cherel Yves, Romanov Evgeny V., Annasawmy Pavanee, Thibault Delphine, Ménard Frédéric (2020). Micronektonic fish species over three seamounts in the southwestern Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104777 (10p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104777 , Open Access version : https://archimer.ifremer.fr/doc/00614/72658/


Crochelet Estelle, Barrier Nicolas, Andrello Marco, Marsac Francis, Spadone Aurélie, Lett Christophe (2020). Connectivity between seamounts and coastal ecosystems in the Southwestern Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104774 (18p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104774 , Open Access version : https://archimer.ifremer.fr/doc/00613/72461/


Rocke Emma, Noyon Margaux, Roberts Michael (2020). Picoplankton and nanoplankton composition on and around a seamount, affected by an eddy dipole south of Madagascar. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104744 (10p.). https://doi.org/10.1016/j.dsr2.2020.104744


Harris Shael A., Noyon Margaux, Marsac Francis, Vianello Patrick, Roberts Michael J. (2020). Ichthyoplankton assemblages at three shallow seamounts in the South West Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104809 (15p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104809 , Open Access version : https://archimer.ifremer.fr/doc/00632/74459/


Annasawmy Pavanee, Ternon Jean-Francois, Cotel Pascal, Cherel Yves, Romanov Evgeny V., Roudaut Gildas, Lebourges-Dhaussy Anne, Ménard Fréderic, Marsac Francis (2019). Micronekton distributions and assemblages at two shallow seamounts of the south-western Indian Ocean: Insights from acoustics and mesopelagic trawl data. Progress In Oceanography, 178, 102161 (21p.). Publisher's official version : https://doi.org/10.1016/j.pocean.2019.102161 , Open Access version : https://archimer.ifremer.fr/doc/00510/62135/


References of Articles published in other Periodicals or Scientific Works acclaimed in the Field

Ternon J.F. & Roberts M. J. (2017). First IIOE2-WIOURI cruise on the Madagascar Ridge, November-December 2016. The Indian Ocean Bubble 2, Vol 7, August 2017, p. 6-8

References of International Seminar Communications

Ternon J.F. et al. (2020). Physical oceanography and biogeochemistry at two shallow seamounts along the Madagascar Ridge. International Indian Ocean Science Conference, 16-20 March 2020 Goa, India (reporté)

Annasawmy P. et al. (2019). Micronekton distributions and assemblages at two shallow seamounts of the south-western Indian Ocean. IMBER Future Ocean 2, 17-21 June 2019, Brest, France

Ternon J.F. et al. (2019). Current-topography interaction at three shallow seamounts in the South-West Indian Ocean: impact on ecosystem productivity. IMBER Future Ocean 2, 17-21 June 2019, Brest, France

Ternon J.F. et al. (2019). MADRIDGE : A shallow seamount ecosystem project in the south West Indian Ocean. IIOE2 Science Conference. Nelson Mandela University, Port Elizabeth, South Africa, 11-15 March 2019

Annasawmy P. et al. (2018). An acoustic approach to investigate the influence of mesoscale eddies and seamounts on micronekton distribution and community composition in the South West Indian Ocean. Working Group on Fisheries Acoustics, Science and Technology (WGFAST) 20-23 March 2018 Seattle, USA

Marsac F. et al. (2018). Ecosystem research at shallow seamounts in the south west Indian Ocean. SIBER (Sustained Indian ocean Biogeochemistry and Ecosystem Research) Scientific Steering Committee, Jakarta, 21 march 2018

Annasawmy et al. (2017). An acoustic approach to investigate micronektondynamics at seamounts in the South West Indian Ocean. 10th WIOMSA Symposium, 30 October - 4 November 2017, Dar es Salaam, Tanzania

Marsac F. et al. (2017). A Shallow seamounts ecosystem project in the South West Indian Ocean: physical processes and ecological responses. Good Hope for Ocean Sciences, Cape Town, 28 August - 1st September 2017

Ternon J.F. et al. (2017). The MAD-Ridge cruise: physical interaction on a seamount ecosystem in the West Indian Ocean. 10th WIOMSA Symposium, 30 October - 4 November 2017, Dar es Salaam, Tanzania

References of National Seminar Communications

Annasawmy P. (2018). Micronekton distribution and assemblages at two shallow seamounts of the South West Indian Ocean. The Ocean Science Days in the Cape. Cape Town, South Africa, 23-26 October 2018

Noyon M. et al. (2018). Mesoscale variability of plankton in the SWIO - is there a seamount effect? The Ocean Science Days in the Cape. Cape Town, South Africa, 23-26 October 2018

Roberts M. (2018). WIOURI-IIOE2 2016-26: A unifying dynamism for marine ecosystem functioning in the WIO - achievements and future projects. The Ocean Science Days in the Cape. Cape Town, South Africa, 23-26 October 2018

Ternon J.F. et al. (2018). Hydrological processes at seamounts. The Ocean Science Days in the Cape. Cape Town, South Africa, 23-26 October 2018

Harris et al. (2017). Influence of eddy dynamics and substrate type on larval fish assemblages around seamounts in the SWIO Region. SAMSS (South African Marine Science Symposium): Indian Ocean Ecosystems and services ? a contribution to the IIOE2. Port Elizabeth, 4-7 July 2017

Rasoloarijao Z. et al (2017). Mesozooplankton communities associated with two shallow seamounts on the Madagascar Ridge (South-West Indian Ocean). SAMSS (South African Marine Science Symposium): Indian Ocean Ecosystems and services : a contribution to the IIOE2. Port Elizabeth, 4-7 July 2017

Ternon et al. (2017). Seamount ecosystems in the South West Indian Ocean: the MAD-Ridge project. SAMSS (South African Marine Science Symposium): Indian Ocean Ecosystems and services ? a contribution to the IIOE2. Port Elizabeth, 4-7 July 2017

DEA or MASTER 2 using campaign data

Gauvrit E. (2020). Eddy-Seamounts interactions in the region of the separation of the East Madagascar Current. Stage M2, IUEM, 2020 (en cours)

Panetier A. (2019). Mad-Ridge Campaign - Current study on the Madagascar Plateau, stage ENSTA Brest, août 2019

Rasoloarijao Z. (2019). Comparison of mesozooplankton communities at three shallow seamounts in the South Western Indian Ocean. MSc, Nelson Mandela University, Port Elizabeth, South Africa, December 2019 (MSC par disseration, diplôme préparé sur 2 ans)

Ruault V. (2017). Traitement et validation de données in-situ récoltées au cours de la campagne MADRIDGE en Novembre-Décembre 2016. Stage ENSTA Brest, septembre 2017

Thesis using campaign data

Panetier Aurélie (2023). Shipborne Global Navigation Satellite Systems for Offshore Atmospheric Water Vapor Monitoring. PhD Thesis, ENSTA Bretagne.


Annasawmy Pavanee (2019). Structures des communautés micronectoniques en relation avec les conditions environnementales à deux monts sous-marins peu profonds du sud-ouest de l'Océan Indien / Patterns among micronekton communities in relation to the environmental conditions at two shalow seamounts in the south-western Indian Ocean. PhD Thesis, Université de Montpellier, University of Cape Town.


Annasawmy P. (2019). Patterns among micronekton communities in relation to environmental conditions at two shallow seamounts in the south-western Indian Ocean. University of Cape Town (Afrique du Sud) & Université de Montpellier (France). IRD (MARBEC), septembre 2019