Emma MICHAUD
Carbon / Biogeochemical Fluxes / Bioturbation / Functional Ecology / Benthic biodiversity / Mangroves / Coastal Ecosystems
Researcher
CNRS
Copyright : Laboratoire LEMAR- 2018
Assignment
LEMAR laboratory
DISCOVERY
Contact
(+33)2 98 49 87 75
Career: I am a researcher at the CNRS, having completed a PhD in Oceanography under joint supervision between Canada (UQAR-ISMER) and France (AMU-MIO), and two post-doctorates, one in the United States of America (Stony Brook University, School of Marine and Atmospheric Sciences) and the other in France (Université de Bretagne Occidentale).
Research theme: My research aims to understand and predict the effects of global change on the erosion of benthic biodiversity and its consequences for the biogeochemical functioning of coastal zones. In this context, my work focuses on the fate of sedimentary carbon in coastal ecosystems under the effect of the biological activities of benthic invertebrates, grouped together under the term ‘bioturbation’, in a context of global warming and increasing anthropisation. I work in coastal environments that store large quantities of carbon in their sediments in temperate, polar and tropical areas (mangroves, estuaries, fjords, mudflats) where bioturbation activities modify its fate (i.e. burial, degradation, remineralisation, etc.) through the physico-chemical modifications of the sediment that they induce. This work has two main axes:
– Axis 1: Characterisation of benthic biodiversity and bioturbation activities in coastal ecosystems (functional ecology)
– Axis 2: Impact of bioturbation changes on coastal biogeochemical functioning (early diagenesis and water-air-sediment biogeochemical fluxes).
I combine experimentation (laboratory microcosms, in situ mesocosms), observation (field measurement and sampling campaigns), and modelling (diagenetic models) studies.
I use high technologies for 2D or 3D analysis and observation of the sedimentary matrix (planar optodes, X-rays, UAVs, photogrammetry, remote sensing, etc.), in close collaboration with chemists, physicists and engineers, in order to incorporate the spatial heterogeneity of the environments studied into my work, from the micro to the macro scale.
Local Collective Responsibilities :
Co-leader of the LEMAR ‘DISCOVERY’ team, 2022-2026
Co-leader of theme 3 ‘Sustainability of coastal systems’ of EUR-ISBLUE, 2022-2026
Co-leader of the ‘LEMAR in the SOUTH’ transverse axis, 2016-present
National and International Collective Responsibilities:
Director of GDR 2162 – Mangroves (Thematic network Mangroves in the Anthropocene: management challenges for threatened socio-ecosystems in the face of global change) – Network of 30 laboratories, 60 participants (2024-2028)
Co-director of GDR LIGA 3586 (Guiana’s coastline under Amazonian influence) – Network of 30 laboratories, 110 participants (2018-2022)
Head of the 1st international thematic school ‘Bioturbation 2022″ as part of the Nereis Park international association
Supervision of post-doctoral researchers:
2023-2025, Romain Gougeon “Ecosystem engineering of the Paleozoic: unravelling deep time animal behaviour evolution through trace-fossil analysis and marine ecology proxies”. (Co-supervision with M. Vidal (Geo-Ocean) and Univ. Saskatchewan, Canada).
2018-2019, Guillaume Brunier, ‘Biogeomorphology of intertidal mudflats in French Guiana’.
2016-2018, Nathalie Morata, ‘Multiple biomarker approach to assess the impact of primary production on Arctic benthic communities’ (Co-supervision with P. Renaud, AkvaPlan NIva, Norway).
2015-2017, Raghab Ray ‘Origin, distribution and transport of Organic Carbon in mangrove dominated estuary (French Guiana, South America) (Co-supervision with G. Thouzeau).
Supervision of PhD Students:
2024-2027, Guerric Barrière ‘Structure of brachyuran crab populations in South American Atlantic mangroves along a latitudinal gradient’ (Co-supervision with M. Tavares (Brazil, USP) and G. Charrier (UBO)).
2020-2024, Adriana Spedicato ‘Role of environmental forcings in the spatial distribution of meiofauna and nematodes in mangroves of French overseas territories (French Guiana, Guadeloupe, Martinique and Mayotte)’ (Co-supervision with G. Thouzeau and D. Zeppilli).
2012-2016, Adélaide Aschenbroich ‘Biodiversity and functioning of benthic communities in the mangroves of French Guiana’ (co-supervision with G. Thouzeau and F. Fromard).
2009-2011, Mélanie Raimonet ‘Benthic silicon cycle in estuaries: observations and modelling at different spatio-temporal scales’ (co-supervision with L. Memery and O. Ragueneau).
Publications within international peer review journals since 2010
355235
ACL
michaud
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apa
50
date
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Michaud, E.
197260
https://www-iuem.univ-brest.fr/lemar/wp-content/plugins/zotpress/
Militon, C., Michaud, E., Sylvi, L., Ferriz, L. M., Roic, E., Gilbert, F., Jezequel, R., & Cuny, P. (2024). In situ oil contamination in young mangroves: Biodegradation of petroleum hydrocarbons and effects on the microbial and benthic communities, an experimental study in French Guiana. MARINE POLLUTION BULLETIN, 209, 117285. https://doi.org/10.1016/j.marpolbul.2024.117285 Cite
Michaud, E., Aschenbroich, A., Stieglitz, T., Brunier, G., Aller, R. C., Anthony, E., Fromard, F., & Thouzeau, G. (2024). Upscaling the contribution of crab burrows to mangrove ecosystem functioning in French Guiana (South America). REGIONAL ENVIRONMENTAL CHANGE, 24(4), 165. https://doi.org/10.1007/s10113-024-02319-z Cite
Aller, R., Klingensmith, I., Stieglitz, T., Heilbrun, C., Waugh, S., Aschenbroich, A., Thouzeau, G., & Michaud, E. (2024). Biogeochemical plumbing of pioneer mangrove intertidal flats in French Guiana. REGIONAL ENVIRONMENTAL CHANGE, 24(3), 117. https://doi.org/10.1007/s10113-024-02272-x Cite
Spedicato, A., Zeppilli, D., Thouzeau, G., Cuny, P., Militon, C., Hubas, C., Sylvi, L., Dirberg, G., Jezequel, R., Barriere, G., Michel, L. N., Bezerra, T. N., & Michaud, E. (2024). Deciphering environmental forcings in the distribution of meiofauna and nematodes in mangroves of the Atlantic-Caribbean-East Pacific and Indo-West Pacific regions. SCIENCE OF THE TOTAL ENVIRONMENT, 930, 172612. https://doi.org/10.1016/j.scitotenv.2024.172612 Cite
Fiard, M., Militon, C., Sylvi, L., Migeot, J., Michaud, E., Jezequel, R., Gilbert, F., Bihannic, I., Devesa, J., Dirberg, G., & Cuny, P. (2024). Uncovering potential mangrove microbial bioindicators to assess urban and agricultural pressures on Martinique island in the eastern Caribbean Sea. SCIENCE OF THE TOTAL ENVIRONMENT, 928, 172217. https://doi.org/10.1016/j.scitotenv.2024.172217 Cite
Cepeda, D., Sanchez, N., Spedicato, A., Michaud, E., & Zeppilli, D. (2024). Environmental drivers modelling the mangrove Kinorhyncha community along an urban-to-natural gradient in French Guiana (western Atlantic Ocean). FRONTIERS IN MARINE SCIENCE, 11, 1342763. https://doi.org/10.3389/fmars.2024.1342763 Cite
Raimonet, M., Ragueneau, O., Soetaert, K., Khalil, K., Leynaert, A., Michaud, E., Moriceau, B., Rabouille, C., & Memery, L. (2023). Benthic contribution to seasonal silica budgets in two macrotidal estuaries in North-Western France. FRONTIERS IN MARINE SCIENCE, 10, 1269142. https://doi.org/10.3389/fmars.2023.1269142 Cite
Serafim, T. S. G., de Almeida, M. G., Thouzeau, G., Michaud, E., Niggemann, J., Dittmar, T., Seidel, M., & de Rezende, C. E. (2023). Land-use changes in Amazon and Atlantic rainforests modify organic matter and black carbon compositions transported from land to the coastal ocean. Science of the Total Environment, 878, 162917. https://doi.org/10.1016/j.scitotenv.2023.162917 Cite
Spedicato, A., Zeppilli, D., Thouzeau, G., & Michaud, E. (2023). Nematode diversity patterns in mangroves: a review of environmental drivers at different spatial scales. Biodiversity and Conservation. https://doi.org/10.1007/s10531-023-02562-6 Cite
Cepeda, D., Gonzalez-Casarrubios, A., Sanchez, N., Spedicato, A., Michaud, E., & Zeppilli, D. (2022). Two new species of mud dragons (Scalidophora: Kinorhyncha) inhabiting a human-impacted mangrove from Mayotte (Southwestern Indian Ocean). Zoologischer Anzeiger, 301, 23–41. https://doi.org/10.1016/j.jcz.2022.09.001 Cite
Cepeda, D., Gayet, N., Spedicato, A., Michaud, E., & Zeppilli, D. (2022). Two new species of the Echinoderes coulli-group (Kinorhyncha: Cyclorhagida: Echinoderidae) from a low human-impacted mangrove swamp in French Guiana (western Atlantic Ocean). Zoologischer Anzeiger, 301, 179–195. https://doi.org/10.1016/j.jcz.2022.10.008 Cite
Michaud, E., Aschenbroich, A., Gauthier, O., Fromard, F., Aller, J. Y., Aller, R. C., Brunier, G., Anthony, E. J., Gardel, A., Le Garrec, V., Leynaert, A., & Thouzeau, G. (2022). The Codevelopment of Mangroves and Infaunal Community Diversity in Response to the Natural Dynamics of Mud Deposition in French Guiana. Sustainability, 14(5), 2829. https://doi.org/10.3390/su14052829 Cite
Fiard, M., Cuny, P., Sylvi, L., Hubas, C., Jezequel, R., Lamy, D., Walcker, R., El Houssainy, A., Heimburger-Boavida, L.-E., Robinet, T., Bihannic, I., Gilbert, F., Michaud, E., Dirberg, G., & Militon, C. (2022). Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators. Science of the Total Environment, 807, 150667. https://doi.org/10.1016/j.scitotenv.2021.150667 Cite
Jaud, M., Sicot, G., Brunier, G., Michaud, E., Le Dantec, N., Ammann, J., Grandjean, P., Launeau, P., Thouzeau, G., Fleury, J., & Delacourt, C. (2021). Easily Implemented Methods of Radiometric Corrections for Hyperspectral-UAV-Application to Guianese Equatorial Mudbanks Colonized by Pioneer Mangroves. Remote Sensing, 13(23), 4792. https://doi.org/10.3390/rs13234792 Cite
Michaud, E., Aller, R. C., Zhu, Q., Heilbrun, C., & Stora, G. (2021). Density and size-dependent bioturbation effects of the infaunal polychaete Nephtys incisa on sediment biogeochemistry and solute exchange. Journal of Marine Research, 79(4), 181–220. https://doi.org/10.1357/002224021834670801 Cite
Gilbert, F., Kristensen, E., Aller, R. C., Banta, G. T., Archambault, P., Belley, R., Bellucci, L. G., Calder, L., Cuny, P., de Montaudouin, X., Eriksson, S. P., Forster, S., Gillet, P., Godbold, J. A., Glud, R. N., Gunnarsson, J., Hulth, S., Lindqvist, S., Maire, A., … Stora, G. (2021). Sediment reworking by the burrowing polychaete Hediste diversicolor modulated by environmental and biological factors across the temperate North Atlantic. A tribute to Gaston Desrosiers. Journal of Experimental Marine Biology and Ecology, 541, 151588. HAL. https://doi.org/10.1016/j.jembe.2021.151588 Cite
Michelet, C., Zeppilli, D., Hubas, C., Baldrighi, E., Cuny, P., Dirberg, G., Militon, C., Walcker, R., Lamy, D., Jézéquel, R., Receveur, J., Gilbert, F., Houssainy, A. E., Dufour, A., Heimbürger-Boavida, L.-E., Bihannic, I., Sylvi, L., Vivier, B., & Michaud, E. (2021). First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana. Forests, 12(3), 338. https://doi.org/10.3390/f12030338 Cite
Dirberg, G., Barnaud, G., Brivois, O., Caessteker, P., Cormier-Salem, M. C., Cuny, P., Fiard, M., Fromard, F., Gilbert, F., Grouard, S., Guiral, D., Hubas, C., Imbert, D., Lamy, D., Meziane, T., Michaud, E., Michelet, C., Militon, C., Pibot, A., … Monnier, O. (2020). Towards the Development of Ecosystem-Based Indicators of Mangroves Functioning State in the Context of the Eu Water Framework Directive. Vie Et Milieu-Life and Environment, 70(3–4), 303–310. https://www.webofscience.com/wos/woscc/full-record/WOS:000675537200029 Cite
Cuny, P., Jezequel, R., Michaud, E., Sylvi, L., Gilbert, F., Fiard, M., Chevalier, C., Morel, V., & Militon, C. (2020). Oil Spill Response in Mangroves: Why a Specific Ecosystem-Based Management Is Required? The Case of French Guiana - a Mini-Review. Vie Et Milieu-Life and Environment, 70(3–4), 69–76. https://www.webofscience.com/wos/woscc/full-record/WOS:000675537200008 Cite
Morata, N., Michaud, E., Poullaouec, M.-A., Devesa, J., Le Goff, M., Corvaisier, R., & Renaud, P. E. (2020). Climate change and diminishing seasonality in Arctic benthic processes. Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences, 378(2181), 20190369. https://doi.org/10.1098/rsta.2019.0369 Cite
Ray, R., Thouzeau, G., Walcker, R., Vantrepotte, V., Gleixner, G., Morvan, S., Devesa, J., & Michaud, E. (2020). Mangrove-Derived Organic and Inorganic Carbon Exchanges Between the Sinnamary Estuarine System (French Guiana, South America) and Atlantic Ocean. Journal of Geophysical Research-Biogeosciences, 125(8), e2020JG005739. https://doi.org/10.1029/2020JG005739 Cite
Baldrighi, E., Dovgal, I., Zeppilli, D., Abibulaeva, A., Michelet, C., Michaud, E., Franzo, A., Grassi, E., Cesaroni, L., Guidi, L., Balsamo, M., Sandulli, R., & Semprucci, F. (2020). The Cost for Biodiversity: Records of Ciliate-Nematode Epibiosis with the Description of Three New Suctorian Species. Diversity-Basel, 12(6), 224. https://archimer.ifremer.fr/doc/00632/74417/. https://doi.org/10.3390/d12060224 Cite
Brunier, G., Michaud, E., Fleury, J., Anthony, E. J., Morvan, S., & Gardel, A. (2020). Assessing the relationship between macro-faunal burrowing activity and mudflat geomorphology from UAV-based Structure-from-Motion photogrammetry. Remote Sensing of Environment, 241, 111717. https://doi.org/10.1016/j.rse.2020.111717 Cite
Oleszczuk, B., Michaud, E., Morata, N., Renaud, P. E., & Kedra, M. (2019). Benthic macrofaunal bioturbation activities from shelf to deep basin in spring to summer transition in the Arctic Ocean. Marine Environmental Research, 150, UNSP 104746. https://doi.org/10.1016/j.marenvres.2019.06.008 Cite
Ray, R., Michaud, E., Aller, R. C., Vantrepotte, V., Gleixner, G., Walcker, R., Devesa, J., Le Goff, M., Morvan, S., & Thouzeau, G. (2018). The sources and distribution of carbon (DOC, POC, DIC) in a mangrove dominated estuary (French Guiana, South America). Biogeochemistry, 138(3), 297–321. https://doi.org/10.1007/s10533-018-0447-9 Cite
Aschenbroich, A., Michaud, E., Gilbert, F., Fromard, F., Alt, A., Le Garrec, V., Bihannic, I., De Coninck, A., & Thouzeau, G. (2017). Bioturbation functional roles associated with mangrove development in French Guiana, South America. Hydrobiologia, 794(1), 179–202. https://doi.org/10.1007/s10750-017-3093-7 Cite
Aschenbroich, A., Michaud, E., Stieglitz, T., Fromard, F., Gardel, A., Tavares, M., & Thouzeau, G. (2016). Brachyuran crab community structure and associated sediment reworking activities in pioneer and young mangroves of French Guiana, South America. Estuarine Coastal and Shelf Science, 182, 60–71. https://doi.org/10.1016/j.ecss.2016.09.003 Cite
Brunier, G., Fleury, J., Anthony, E. J., Pothin, V., Vella, C., Dussouillez, P., Gardel, A., & Michaud, E. (2016). Structure-from-Motion photogrammetry for high-resolution coastal and fluvial geomorphic surveys. Géomorphologie : Relief, Processus, Environnement, 22(2), 147–161. https://doi.org/10.4000/geomorphologie.11358 Cite
Berge, J., Daase, M., Renaud, P. E., Ambrose, W. G., Darnis, G., Last, K. S., Leu, E., Cohen, J. H., Johnsen, G., Moline, M. A., Cottier, F., Varpe, O., Shunatova, N., Balazy, P., Morata, N., Massabuau, J.-C., Falk-Petersen, S., Kosobokova, K., Hoppe, C. J. M., … Callesen, T. A. (2015). Unexpected Levels of Biological Activity during the Polar Night Offer New Perspectives on a Warming Arctic. Current Biology, 25(19), 2555–2561. https://doi.org/10.1016/j.cub.2015.08.024 Cite
Morata, N., Michaud, E., & Wlodarska-Kowalczuk, M. (2015). Impact of early food input on the Arctic benthos activities during the polar night. Polar Biology, 38(1), 99–114. https://doi.org/10.1007/s00300-013-1414-5 Cite
Raimonet, M., Andrieux-Loyer, F., Ragueneau, O., Michaud, E., Kérouel, R., Philippon, X., Nonent, M., & Mémery, L. (2013). Strong gradient of benthic biogeochemical processes along a macrotidal temperate estuary: focus on P and Si cycles. Biogeochemistry, 115(1–3), 399–417. http://link.springer.com/article/10.1007/s10533-013-9843-3 Cite
Michaud, E., Aller, R. C., & Stora, G. (2010). Sedimentary organic matter distributions, burrowing activity, and biogeochemical cycling: natural patterns and experimental artifacts. Estuarine, Coastal and Shelf Science, 90(1), 21–34. http://www.sciencedirect.com/science/article/pii/S0272771410002799 Cite
Others publications before 2010
Michaud, E., G. Desrosiers, R. Aller, F. Mermillod-Blondin, B. Sundby, G. Stora. 2009. Spatial interactions in the Macoma balthica community control biogeochemical fluxes at the sediment-water interface and microbial abundances. J. Mar. Res. 61, 1, 43-70. https://doi.org/10.1357/002224009788597926
Gilbert F., Hulth S., Grossi V., Poggiale J-C., Desrosiers G., Rosenberg R., Gérino M., François-Carcaillet F., Michaud E., Stora G. 2007. Sediment reworking activity rates and patterns in some marine benthic species from the Gullmar Fjord (Western Sweden). Importance of faunal biovolume. JEMBE, 348, 1-2, 133-144. https://doi.org/10.1016/j.jembe.2007.04.015
Michaud, E., G. Desrosiers, F. Mermillod-Blondin, B. Sundby, G. Stora. 2006. The functional group approach to bioturbation: II. The effects of the M. balthica community on fluxes of nutrients and dissolved organic carbon across the sediment-water interface. JEMBE, 337: 178-189. https://doi.org/10.1016/j.jembe.2006.06.025
Michaud, E., G. Desrosiers, F. Mermillod-Blondin, B. Sundby, G. Stora. 2005. The functional group approach to bioturbation: The effects of biodiffusers and gallery-diffusers of the M. balthica community on sediment oxygen uptake. JEMBE, Vol. 326, 77-88. https://doi.org/10.1016/j.jembe.2005.05.016
Mermillod-Blondin, S. Marie, G. Desrosiers, B. Long, L. de Montety, E. Michaud, G. Stora. 2003. Assessment of the spatial variability of intertidal benthic communities by axial tomodensitometry: importance of fine-scale heterogeneity. JEMBE, Vol. 287, 193-208. https://doi.org/10.1016/S0022-0981(02)00548-8
Solan, J.D. Germano, D.C. Rhoads, C. Smith, E. Michaud, D. Parry, F. Wenzhöfer, B. Kennedy, C. Henriques, E. Battle, D. Carey, L. Iocco, R. Valente, J. Watson and R. Rosenberg. 2003. Towards a greater understanding of pattern, scale and process in marine benthic systems: a picture is worth a thousand worms. J. Exp. Mar. Biol. Ecol. Vol. 285-286, 313-339. https://doi.org/10.1016/S0022-0981(02)00535-X
Michaud, E., G. Desrosiers, B. Long, L. de Montety, J.F. Crémer, E. Pelletier, J. Locat, F. Gilbert, G. Stora. 2003. Use of axial tomography to follow temporal changes of benthic communities in an unstable sedimentary environment (Ha!Ha! Bay, Saguenay Fjord). J. Exp. Mar. Biol. Ecol.Vol. 285-286, 265-282. https://doi.org/10.1016/S0022-0981(02)00532-4
Desrosiers, G., Gonon, M., de Montety, L., Pelletier, É., Nozais, C., Michaud, E., Stora, G., Long, B., Tremblay, H., Locat, J. 2nd International Symposium on Contaminated Sediments. Québec, Canada, 26-28 mai. Editeur : H. Tremblay, J. Locat, R. Galvez-Cloutier. pp. 78-82
Michaud, E., B. Long, J.F. Crémer, G. Desrosiers, L. de Montety. 2001. Les phases de construction deltaïques, influence d’un apport catastrophique. Canadian Coastal Conference, Quebec, Proceedings. Québec, 16-19 mai. Éditeur : B.F. Long. pp. 533-547.
Books:
E. Michaud, A. Aschenbroich, G. Thouzeau. “La mangrove, l’incontournable du littoral guyanais” in A. Gardel & D. Davy (sous la direction de), Oyapock et Maroni. Portraits d’estuaires amazoniens, Paris, éditions Quæ, Paru le 25 mars 2021. 142 p. ISBN 2759232743
Mangrove, une forêt dans la mer. in F. Fromard, E. Michaud, M. Hossaert-McKey (sous la direction de), Eds Cherche-Midi. Paru le 2 février 2018. 167 p. ISBN 978-2-7491-5764-1
