Marine ecology / trophic ecology / stable isotopes / metals

IRD Ouest


LEMAR Laboratory



+33 2 90 91 55 75

I am working on the trophic ecology of organisms in order to understand the functioning of marine ecosystems and to predict their responses to global changes.

I use marine organisms, and more specifically their chemical composition (stable isotopes C, N, Hg, and contaminants), as tools to understand the functioning of benthic and pelagic ecosystems, using invertebrates such as bivalves and corals and large predators such as tuna and seabirds.

Two main axes characterise the different facets of my research on large predators and invertebrates, showing in particular the feedback that seabirds feeding in the open sea can have on coastal ecosystems.

  1. Tuna as ocean sentinels: from monitoring to detecting spatial and temporal global changes.
  2. Seabirds to the rescue of coral reefs: the role of guano-derived nutrients on coral health.

This work has been carried out mainly with Overseas Territories in the south-west Pacific but also in Peru and in the Indian Ocean and I am currently developing a global scale for the tuna studies.

355235 ACL Lorrain items 1 apa 0 default desc 1 Lorrain, A. 200428
Medieu, A., Point, D., Sonke, J. E., Angot, H., Allain, V., Bodin, N., Adams, D. H., Bignert, A., Streets, D. G., Buchanan, P. B., Heimbuerger-Boavida, L.-E., Pethybridge, H., Gillikin, D. P., Menard, F., Choy, C. A., Itai, T., Bustamante, P., Dhurmeea, Z., Ferriss, B. E., … Lorrain, A. (2024). Stable Tuna Mercury Concentrations since 1971 Illustrate Marine Inertia and the Need for Strong Emission Reductions under the Minamata Convention. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS. Cite
Verwega, M.-T., Somes, C. J., Schartau, M., Tuerena, R. E., Lorrain, A., Oschlies, A., & Slawig, T. (2021). Description of a global marine particulate organic carbon-13 isotope data set. EARTH SYSTEM SCIENCE DATA, 13(10), 4861–4880. Cite
Serre, S., Jung, A., Cherel, Y., Gamblin, C., Hennache, C., Le Loc’h, F., Lorrain, A., Priac, A., Schaal, G., & Stephan, E. (2024). Stable isotopes reveal intrapopulation heterogeneity of porbeagle shark (Lamna nasus). REGIONAL STUDIES IN MARINE SCIENCE, 69, 103340. Cite
Choisnard, N., Duprey, N. N., Wald, T., Thibault, M., Houlbreque, F., Foreman, A. D., Cuet, P., Guillaume, M. M. M., Vonhof, H., Sigman, D. M., Haug, G. H., Maguer, J.-F., L’Helguen, S., Martinez-Garcia, A., & Lorrain, A. (2024). Tracing the fate of seabird-derived nitrogen in a coral reef using nitrate and coral skeleton nitrogen isotopes. LIMNOLOGY AND OCEANOGRAPHY. Cite
Le Croizier, G., Lorrain, A., Hoyos-Padilla, M., Ketchum, J. T., Amezcua-Martinez, F., Le Loc’h, F., Munaron, J.-M., Schaal, G., & Point, D. (2023). Do marine protected areas influence mercury exposure? Insights from a shark community in the tropical Northeast Pacific. ENVIRONMENTAL POLLUTION, 336, 122352. Cite
Medieu, A., Lorrain, A., & Point, D. (2023). Are tunas relevant bioindicators of mercury concentrations in the global ocean? Ecotoxicology. Cite
Barbosa, R. V., Point, D., Medieu, A., Allain, V., Gillikin, D. P., Couturier, L. I. E., Munaron, J.-M., Roupsard, F., & Lorrain, A. (2022). Mercury concentrations in tuna blood and muscle mirror seawater methylmercury in the Western and Central Pacific Ocean. Marine Pollution Bulletin, 180, 113801. Cite
Medieu, A., Point, D., Itai, T., Angot, H., Buchanan, P. J., Allain, V., Fuller, L., Griffiths, S., Gillikin, D. P., Sonke, J. E., Heimburger-Boavida, L.-E., Desgranges, M.-M., Menkes, C. E., Madigan, D. J., Brosset, P., Gauthier, O., Tagliabue, A., Bopp, L., Verheyden, A., & Lorrain, A. (2022). Evidence that Pacific tuna mercury levels are driven by marine methylmercury production and anthropogenic inputs. Proceedings of the National Academy of Sciences of the United States of America, 119(2), e2113032119. Cite
Le Croizier, G., Point, D., Renedo, M., Munaron, J.-M., Espinoza, P., Amezcua-Martinez, F., Bertrand, S. L., & Lorrain, A. (2022). Mercury concentrations, biomagnification and isotopic discrimination factors in two seabird species from the Humboldt Current ecosystem. Marine Pollution Bulletin, 177, 113481. Cite
Lorrain, A., Clavier, J., Thébault, J., Tremblay-Boyer, L., Houlbreque, F., Amice, E., Le Goff, M., & Chauvaud, L. (2015). Variability in diel and seasonal in situ metabolism of the tropical gastropod Tectus niloticus. Aquatic Biology, 23(2), 167–182. fdi:010063970. Cite
Biscere, T., Rodolfo-Metalpa, R., Lorrain, A., Chauvaud, L., Thébault, J., Clavier, J., & Houlbreque, F. (2015). Responses of two scleractinian corals to cobalt pollution and ocean acidification. Plos One, 10(4), e0122898. Cite
Thibault, M., Duprey, N., Gillikin, D. P., Thébault, J., Douillet, P., Chauvaud, L., Amice, E., Munaron, J. M., & Lorrain, A. (2020). Bivalve δ15N isoscapes provide a baseline for urban nitrogen footprint at the edge of a World Heritage coral reef. Marine Pollution Bulletin, 152, 110870. Cite
Thibault, M., Houlbreque, F., Duprey, N. N., Choisnard, N., Gillikin, D. P., Meunier, V., Benzoni, F., Ravache, A., & Lorrain, A. (2022). Seabird-Derived Nutrients Supply Modulates the Trophic Strategies of Mixotrophic Corals. Frontiers in Marine Science, 8, 790408. Cite
Le Croizier, G., Sonke, J. E., Lorrain, A., Renedo, M., Hoyos-Padilla, M., Santana-Morales, O., Meyer, L., Huveneers, C., Butcher, P., Amezcua-Martinez, F., & Point, D. (2022). Foraging plasticity diversifies mercury exposure sources and bioaccumulation patterns in the world’s largest predatory fish. Journal of Hazardous Materials, 425, 127956. Cite
Verwega, M.-T., Somes, C. J., Schartau, M., Tuerena, R. E., Lorrain, A., Oschlies, A., & Slawig, T. (2021). Description of a global marine particulate organic carbon-13 isotope data set. Earth System Science Data, 13(10), 4861–4880. Cite
Medieu, A., Sardenne, F., Lorrain, A., Bodin, N., Pazart, C., Le Delliou, H., & Point, D. (2021). Lipid-free tuna muscle samples are suitable for total mercury analysis. Marine Environmental Research, 169, 105385. Cite
Thibault, M., Lorrain, A., & Houlbreque, F. (2021). Comment on Trophic strategy and bleaching resistance in reef-building corals. Science Advances, 7(23), eabd9453. Cite
Lorrain, A., Pethybridge, H., Cassar, N., Receveur, A., Allain, V., Bodin, N., Bopp, L., Choy, C. A., Duffy, L., Fry, B., Goni, N., Graham, B. S., Hobday, A. J., Logan, J. M., Menard, F., Menkes, C. E., Olson, R. J., Pagendam, D. E., Point, D., … Young, J. W. (2020). Trends in tuna carbon isotopes suggest global changes in pelagic phytoplankton communities. Global Change Biology. fdi:010077289. Cite
Le Croizier, G., Lorrain, A., Schaal, G., Ketchum, J., Hoyos-Padilla, M., Besnard, L., Munaron, J.-M., Le Loc’h, F., & Point, D. (2020). Trophic resources and mercury exposure of two silvertip shark populations in the Northeast Pacific Ocean. Chemosphere, 253, 126645. Cite
Le Croizier, G., Lorrain, A., Sonke, J. E., Jaquemet, S., Schaal, G., Renedo, M., Besnard, L., Cherel, Y., & Point, D. (2020). Mercury isotopes as tracers of ecology and metabolism in two sympatric shark species. Environmental Pollution, 265(PT B), 114931. Cite
Logan, J. M., Pethybridge, H., Lorrain, A., Somes, C. J., Allain, V., Bodin, N., Choy, C. A., Duffy, L., Goni, N., Graham, B., Langlais, C., Menard, F., Olson, R., & Young, J. (2020). Global patterns and inferences of tuna movements and trophodynamics from stable isotope analysis. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 175, 104775. Cite
Ravache, A., Bourgeois, K., Thibault, M., Dromzee, S., Weimerskirch, H., de Grissac, S., Prudor, A., Lorrain, A., Menkes, C., Allain, V., Bustamante, P., Letourneur, Y., & Vidal, E. (2020). Flying to the moon: Lunar cycle influences trip duration and nocturnal foraging behavior of the wedge-tailed shearwater Ardenna pacifica. Journal of Experimental Marine Biology and Ecology, 525, 151322. fdi:010078443. Cite
Moore, B. R., Adams, T., Allain, V., Bell, J. D., Bigler, M., Bromhead, D., Clark, S., Davies, C., Evans, K., Faasili, U., Farley, J., Fitchett, M., Grewe, P. M., Hampton, J., Hyde, J., Leroy, B., Lewis, A., Lorrain, A., Macdonald, J., … Smith, N. (2020). Defining the stock structures of key commercial tunas in the Pacific Ocean II: Sampling considerations and future directions. Fisheries Research, 230, 105524. Cite
Ravache, A., Bourgeois, K., Weimerskirch, H., Pagenaud, A., de Grissac, S., Miller, M., Dromzee, S., Lorrain, A., Allain, V., Bustamante, P., Bylemans, J., Gleeson, D., Letourneur, Y., & Vidal, E. (2020). Behavioral and trophic segregations help the Tahiti petrel to cope with the abundance of wedge-tailed shearwater when foraging in oligotrophic tropical waters. Scientific Reports, 10(1), 15129. Cite
Mathieu-Resuge, M., Le Grand, F., Schaal, G., Kraffe, E., Lorrain, A., Letourneur, Y., Lemonnier, H., Benoit, J., & Hochard, S. (2020). Assimilation of shrimp farm sediment by Holothuria scabra: a coupled fatty acid and stable isotope approach. Aquatic Living Resources, 33, 3. Cite
Bodin, N., Pethybridge, H., Duffy, L. M., Lorrain, A., Allain, V., Logan, J. M., Menard, F., Graham, B., Choy, C. A., Somes, C. J., Olson, R. J., & Young, J. W. (2021). Global data set for nitrogen and carbon stable isotopes of tunas. Ecology, 102(3), e03265. Cite
Medieu, A., Point, D., Receveur, A., Gauthier, O., Allain, V., Pethybridge, H., Menkes, C. E., Gillikin, D. P., Revill, A. T., Somes, C. J., Collin, J., & Lorrain, A. (2021). Stable mercury concentrations of tropical tuna in the south western Pacific ocean: An 18-year monitoring study. Chemosphere, 263, 128024. Cite
Le Croizier, G., Lorrain, A., Sonke, J. E., Hoyos-Padilla, E. M., Galvan-Magana, F., Santana-Morales, O., Aquino-Baleyto, M., Becerril-Garcia, E. E., Muntaner-Lopez, G., Ketchum, J., Block, B., Carlisle, A., Jorgensen, S. J., Besnard, L., Jung, A., Schaal, G., & Point, D. (2020). The Twilight Zone as a Major Foraging Habitat and Mercury Source for the Great White Shark. Environmental Science & Technology, 54(24), 15872–15882. Cite
Meunier, V., Bonnet, S., Pernice, M., Benavides, M., Lorrain, A., Grosso, O., Lambert, C., & Houlbreque, F. (2019). Bleaching forces coral’s heterotrophy on diazotrophs and Synechococcus. Isme Journal, 13(11), 2882–2886. fdi:010077088. Cite
Thibault, M., Houlbreque, F., Lorrain, A., & Vidal, E. (2019). Seabirds: Sentinels beyond the oceans. Science, 366(6467), 813–813. fdi:010077447. Cite
Biscere, T., Zampighi, M., Lorrain, A., Jurriaans, S., Foggo, A., Houlbreque, F., & Rodolfo-Metalpa, R. (2019). High pCO(2) promotes coral primary production. Biology Letters, 15(7), 20180777. fdi:010076548. Cite
Houssard, P., Point, D., Tremblay-Boyer, L., Allain, V., Pethybridge, H., Mashou, J., Ferriss, B. E., Baya, P. A., Lagane, C., Menkes, C. E., Letourneur, Y., & Lorrain, A. (2019). A Model of Mercury Distribution in Tuna from the Western and Central Pacific Ocean: Influence of Physiology, Ecology and Environmental Factors. Environmental Science & Technology, 53(3), 1422–1431. Cite
Pethybridge, H., Choy, C. A., Logan, J. M., Allain, V., Lorrain, A., Bodin, N., Somes, C. J., Young, J., Menard, F., Langlais, C., Duffy, L., Hobday, A. J., Kuhnert, P., Fry, B., Menkes, C., & Olson, R. J. (2018). A global meta-analysis of marine predator nitrogen stable isotopes: Relationships between trophic structure and environmental conditions. Global Ecology and Biogeography, 27(9), 1043–1055. fdi:010074382. Cite
Dutheil, C., Aumont, O., Gorgues, T., Lorrain, A., Bonnet, S., Rodier, M., Dupouy, C., Shiozaki, T., & Menkes, C. (2018). Modelling N-2 fixation related to Trichodesmium sp.: driving processes and impacts on primary production in the tropical Pacific Ocean. Biogeosciences, 15(14), 4333–4352. fdi:010073657. Cite
Bird, C. S., Verissimo, A., Magozzi, S., Abrantes, K. G., Aguilar, A., Al-Reasi, H., Barnett, A., Bethea, D. M., Biais, G., Borrell, A., Bouchoucha, M., Boyle, M., Brooks, E. J., Brunnschweiler, J., Bustamante, P., Carlisle, A., Catarino, D., Caut, S., Cherel, Y., … Trueman, C. N. (2018). A global perspective on the trophic geography of sharks. Nature Ecology & Evolution, 2(2), 299-+. fdi:010072425. Cite
Gillikin, D. P., Lorrain, A., Jolivet, A., Kelemen, Z., Chauvaud, L., & Bouillon, S. (2017). High-resolution nitrogen stable isotope sclerochronology of bivalve shell carbonate-bound organics. Geochimica et Cosmochimica Acta, 200, 55–66. fdi:010069420. Cite
Espinoza, P., Lorrain, A., Menard, F., Cherel, Y., Tremblay-Boyer, L., Arguëlles, J., Tafur, R., Bertrand, S., Tremblay, Y., Ayon, P., Munaron, J.-M., Richard, P., & Bertrand, A. (2017). Trophic structure in the northern Humboldt Current system: new perspectives from stable isotope analysis. Marine Biology, 164(4), 86. fdi:010069458. Cite
Lorrain, A., Houlbreque, F., Benzoni, F., Barjon, L., Tremblay-Boyer, L., Menkes, C., Gillikin, D. P., Payri, C., Jourdan, H., Boussarie, G., Verheyden, A., & Vidal, E. (2017). Seabirds supply nitrogen to reefbuilding corals on remote Pacific islets. Nature Scientific Reports, 7, 3721. Cite
Houssard, P., Lorrain, A., Tremblay-Boyer, L., Allain, V., Graham, B. S., Menkes, C. E., Pethybridge, H., Couturier, L., Point, D., Leroy, B., Receveur, A., Hunt, B. P. V., Vourey, E., Bonnet, S., Rodier, M., Raimbault, P., Feunteun, E., Kuhnert, P. M., Munaron, J.-M., … Letourneur, Y. (2017). Trophic position increases with thermocline depth in yellowfin and bigeye tuna across the Western and Central Pacific Ocean. Progress in Oceanography, 154, 49–63. Cite
Biscéré, T., Lorrain, A., Rodolfo-Metalpa, R., Gilbert, A., Wright, A., Devissi, C., Peignon, C., Farman, R., Duvieilbourg, E., Payri, C., & Houlbreque, F. (2017). Nickel and ocean warming affect scleractinian coral growth. Marine Pollution Bulletin, 120(1–2), 250–258. fdi:010070917. Cite
Benavides, M., Houlbreque, F., Camps, M., Lorrain, A., Grosso, O., & Bonnet, S. (2016). Diazotrophs: a non-negligible source of nitrogen for the tropical coral Stylophora pistillata. Journal of Experimental Biology, 219(17), 2608–2612. fdi:010068211. Cite
Schaal, G., Nerot, C., Grall, J., Chouvelon, T., Lorrain, A., Mortillaro, J.-M., Savoye, N., Brind’Amour, A., Paulet, Y.-M., & Le Bris, H. (2016). Stable isotope ratios in bentho-demersal biota along a depth gradient in the Bay of Biscay: A multitrophic study. Estuarine Coastal and Shelf Science, 179, 201–206. fdi:010068095. Cite
Nerot, C., Meziane, T., Schaal, G., Grall, J., Lorrain, A., Paulet, Y.-M., & Kraffe, E. (2015). Spatial changes in fatty acids signatures of the great scallop Pecten maximus across the Bay of Biscay continental shelf. Continental Shelf Research, 109, 1–9. fdi:010065445. Cite
Jolivet, A., Chauvaud, L., Thébault, J., Robson, A. A., Dumas, P., Amos, G., & Lorrain, A. (2015). Circadian behaviour of Tectus (Trochus) niloticus in the southwest Pacific inferred from accelerometry. Movement Ecology, 3(1), 1–12. fdi:010074439. Cite
Menkes, C. E., Allain, V., Rodier, M., Gallois, F., Lebourges-Dhaussy, A., Hunt, B. P. V., Smeti, H., Pagano, M., Josse, E., Daroux, A., Lehodey, P., Senina, I., Kestenare, E., Lorrain, A., & Nicol, S. (2015). Seasonal oceanography from physics to micronekton in the south-west Pacific. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 113, 125–144. fdi:010064091. Cite
Hunt, B. P. V., Allain, V., Menkes, C., Lorrain, A., Graham, B., Rodier, M., Pagano, M., & Carlotti, F. (2015). A coupled stable isotope-size spectrum approach to understanding pelagic food-web dynamics: A case study from the southwest sub-tropical Pacific. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 113, 208–224. Cite
Poulain, C., Gillikin, D. P., Thébault, J., Munaron, J. M., Bohn, M., Robert, R., Paulet, Y.-M., & Lorrain, A. (2015). An evaluation of Mg/Ca, Sr/Ca, and Ba/Ca ratios as environmental proxies in aragonite bivalve shells. Chemical Geology, 396, 42–50. Cite
Young, J. W., Hunt, B. P. V., Cook, T. R., Llopiz, J. K., Hazen, E. L., Pethybridge, H. R., Ceccarelli, D., Lorrain, A., Olson, R. J., Allain, V., Menkes, C., Patterson, T., Nicol, S., Lehodey, P., Kloser, R. J., Arrizabalaga, H., & Choy, C. A. (2015). The trophodynamics of marine top predators: Current knowledge, recent advances and challenges. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 113, 170–187. Cite
Young, J. W., Olson, R. J., Menard, F., Kuhnert, P. M., Duffy, L. M., Allain, V., Logan, J. M., Lorrain, A., Somes, C. J., Graham, B., Goni, N., Pethybridge, H., Simier, M., Potier, M., Romanov, E., Pagendam, D., Hannides, C., & Choy, C. A. (2015). Setting the stage for a global-scale trophic analysis of marine top predators: a multi-workshop review. Reviews in Fish Biology and Fisheries, 25(1), 261–272. fdi:010063981. Cite