ChEReef 2021

Type Oceanographic cruise
Set This cruise is part of the set CHEREEF-OBS
Ship Thalassa
Ship owner Ifremer
Dates 04/08/2021 - 05/09/2021
Chief scientist(s) MENOT Lenaick ORCID, TOUROLLE Julie ORCID

LABORATOIRE ENVIRONNEMENT PROFOND

Centre Ifremer Bretagne

ZI Pointe du Diable

CS 10070

29280 Plouzané

+33 (0)2 98.22.43.04

https://www.umr-beep.fr/
DOI 10.17600/18001448
Objective

From August 5 to September 5, 2021, on the oceanographic vessel Thalassa, the first of the six annual ChEReef cruises took place in the Bay of Biscay. Within the framework of the Marha Integrated Life Program, which aims to assess and improve the conservation status of marine habitats, the ChEReef project is working on the assessment of the health status of deep-sea corals in the Lampaul submarine canyon. This canyon, located 200 km off the coast of Brittany, is included in a Natura 2000 site.

This cruise has allowed to initiate the area-based and temporal approaches of the evaluation and monitoring of the conservation status of the Reef habitats in the Lampaul canyon (Bay of Biscay). The objective is also to better understand the role of geomorphological, hydrodynamic, sedimentary and anthropogenic factors in the distribution of corals within the canyon, by answering four main questions:

  1. What is the role of the heterogeneity of geomorphological structures of a canyon in the distribution and diversity of benthic habitats?
  2. How does a canyon influence local hydrodynamics and what are the consequences on the nature, distribution and dynamics of benthic habitats?
  3. What are the nature, quantities and dynamics of sedimentary and trophic inputs in a canyon?
  4. What are the growth rates and optimal growth conditions of reef coral species?

To address these questions,  the AUV Idef'X and the HROV Ariane were used in combination to produce a complete morpho-sedimentary mapping of the Lampaul canyon at a metric resolution as well as 2D and 3D mosaics of targeted reef habitats. Three mooring lines of sediment traps, ADCP and turbidimeters have been deployed and will allow characterizing the currents and particle fluxes at the canyon scale. In situ experiments have been initiated to assess the growth rates of the two reef-building species Lophelia pertusa and Madrepora oculata. Coral colonies have been also collected for warming and acidification experiments in pressurized tanks.

The MARLEY (Monitoring deep seA coRaL EcosYtem) autonomous observation station has been deployed to monitor the dynamics of corals and their environment. It will allow to observe daily and for 5 years a coral colony and its close environment while measuring the physical, chemical and hydro-sedimentary parameters of the coral habitat. The period of deployment and maintenance of the observatory is limited by the duration of the Marha project, the observatory will be definitely recovered in 2026.

Scientific context

Published data

Marcillat Marin, Menot Lenaick, Van Audenhaege Loic, Borremans Catherine (2024). Exemple data for 2D image annotations onto 3D models. https://doi.org/10.17882/99108


Tourolle Julie, Moreau Bertrand, Lagadec Jean Romain, Menot Lenaick (2022). MARLEY seafloor observing system, environmental data for 2021-2022. https://doi.org/10.17882/102345


Data managed by SISMER

Sampling operations

Dives

Moorings

Bibliography

Publications

Chemel Mathilde, Peru Erwan, Binsarhan Mohammad Mutlaq, Logares Ramiro, Lartaud Franck, Galand Pierre E. (2024). Cold-water coral mortality under ocean warming is associated with pathogenic bacteria. Environmental Microbiome, 19, 76 (13p.). Publisher's official version : https://doi.org/10.1186/s40793-024-00622-0 , Open Access version : https://archimer.ifremer.fr/doc/00886/99748/


de Bettignies Thibaut, Van Den Beld Inge, Janson Anne-Laure, Fabri Marie-ClaireORCID, Menot LenaickORCID, Lartaud Franck, Le Bris Nadine, Paquignon Guillaume, Robert Alexandre, Boyé AurélienORCID (2024). Bilan des connaissances sur les récifs du bathyal et évaluation de l’état de conservation de l’habitat d’intérêt communautaire Récifs dans les eaux françaises hexagonales. Naturae, 2024(8), 143-177. Publisher's official version : https://doi.org/10.5852/naturae2024a8 , Open Access version : https://archimer.ifremer.fr/doc/00888/100024/


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

Borremans CatherineORCID (2024). Citoyens et scientifiques unissent leurs forces pour sonder les mystères des fonds marins. The Conversation, 229515 (4p.). Open Access version : https://archimer.ifremer.fr/doc/00891/100313/


References of Technical Reports

Thérasse Logan (2024). Caractérisation des niches trophiques des coraux et de la faune associée des récifs coralliens profonds du canyon de Lampaul dans le Golfe de Gascogne, en France, par méthodes d’isotopes stables. Rapport de Master en biologie des organismes et écologie, à finalité approfondie. Université de Liège.


Tourolle JulieORCID, Menot LenaickORCID (2024). Bilan intermédiaire des actions d’évaluation de l’état de conservation de l’habitat « récifs profonds » sur le canyon de Lampaul. Projet Européen Life Intégré Marha, Livrable Action D1 Réf. Ifremer/BEEP/LEP/2024‐01. 43p. https://doi.org/10.13155/99977


Tourolle JulieORCID, Menot LenaickORCID (2023). Approches méthodologiques pour l’évaluation de l’état de conservation des habitats profonds : récifs de coraux d’eau froide. Projet Européen Life Intégré Marha, Livrable Action A2.2. Réf. Ifremer/BEEP/LEP/2023‐03. 47p. https://doi.org/10.13155/99976


Schoening Timm, Dominguez Carrio Carlos, Morato Telmo, Bajjouk Touria, Ferrera MaximeORCID, Petit Tristan, Arnaubec Aurelien (2023). New imaging and analysis approaches for marine species detection and classification. WP2. iAtlantic Deliverable 2.4. https://archimer.ifremer.fr/doc/00906/101824/


Besson FlorianORCID, Cambon Marie-AnneORCID, Chu Nan-Chin, Le Gall Morgane, Sarradin Pierre-MarieORCID, Ybert Sebastien (2022). Rapport de veille scientifique et technologique relative aux ressources minérales non énergétiques des grands fonds. Convention référence 19/1000 085-AV1 entre le Ministère de la Transition Écologique – Direction de l’Eau et de la Biodiversité et l’Institut français de recherche pour l’exploitation de la mer – Action 5. 2. REM/2022-031. Rapport de veille scientifique n°15.


Matthys Leopold (2022). Caractérisation d’habitats benthiques de falaises du canyon de Lampaul. Golfe de Gascogne. Stage Master 1 "Sciences de la mer - Interactions biotiques et perturbations anthropiques en environnement" à l'Université de Toulon. ODE/UL/LER-PAC 22-06. https://archimer.ifremer.fr/doc/00781/89293/


Besson FlorianORCID, Cambon Marie-AnneORCID, Chu Nan-Chin, Cuif Marion, Lacroix Denis, Le Gall Morgane, Lequesne Berenice, Menot LenaickORCID, Pelleter EwanORCID, Sarradin Pierre-MarieORCID (2021). Rapport de veille scientifique et technologique relative aux ressources minérales non énergétiques des grands fonds. Convention référence 19/1000 085-AV1 entre le Ministère de la Transition Ecologique – Direction de l’Eau et de la Biodiversité et l’Institut français de recherche pour l’exploitation de la mer – Action 5. 2. REM/2022-029. Rapport de veille scientifique n°13.


Gaillot Arnaud, Ferrand Paco (2021). Mission ChEReef 2021: Traitement des données SMF coque, AUV et HROV. N/O Thalassa 04/08/2021 au 24/08/2021. 20211104_AG01_CHEREEF_TraitementSMF. https://archimer.ifremer.fr/doc/00757/86855/


Menot Lénaïck, Tourolle Julie (2021). ChEReef 2021. Zone de travail - Canyon de Lampaul. Navire Thalassa. HROV Ariane et AUV Idef'X. Compte-rendu opérationnel de la campagne. REM/EEP/2021-0X

References of International Seminar Communications

Menot Lénaick, Tourolle Julie, Olu Karine, Moreau Bertrand, Silva Jacinto Ricardo, Shillito Bruce et Lartaud Franck (2021). The ChEReef project: what threats on cold?water coral reefs in the Bay of Biscay, how to monitor and how to predict them?. Poster, 16DSBS, Brest, France, 12-17 septembre 2021.