Emma Michaud

Project type



Le projet “Mangroves” regroupe plusieurs sous-projets aux sources de financement diverses:

  • ANR
  • AFB
  • CNES
  • EC2CO
  • FEDER (UE)
  • LAbexMer/ISblu
  • PIG (CNRS)

Project duration

Start Date


End Date



Mangroves are a source of “ecological services” (or “ecosystem services”) that are often overshadowed by the negative perception of mangroves in the eyes of riparian societies, and which appear when the destruction of mangroves makes them unavailable: nursery for coastal species (shrimp, fish), protection of the coastline against erosion caused by swells or tsunamis, runoff water purification, “blue” carbon reservoir, biogeochemical cycles…

Scientists, managers and politicians are examining the future of mangroves with population growth, sea-level rise and numerous pollution, as well as the impact on the functioning of coastal systems and the balance of local populations associated with mangrove dynamics. The implementation of management, coastal conservation and restoration strategies requires a thorough knowledge of mangrove-dominated coastlines.

LEMAR studies on mangroves cover several aspects:

  • Quantification of biogeochemical flows between different reservoirs (sediment-water-air) and exchanges with adjacent ecosystems (estuaries, coastal waters, reefs)
  • Identification of the benthic biodiversity of the microflora and microfauna of mangrove mud
  • Study of the role of this benthic biodiversity in bioturbation activities, on the degradation and recycling of mangrove organic matter, and in fine on the functioning of mangroves
355235 mangrove items 1 apa 0 date desc 1 192612
Sardenne, F., Le Loc’h, F., Bodin, N., Mve-Beh, J.-H., Munaron, J.-M., Mbega, J.-D., Nzigou, A. R., Sadio, O., Budzinski, H., & Leboulanger, C. (2024). Persistent organic pollutants and trace metals in selected marine organisms from the Akanda National Park, Gabon (Central Africa). MARINE POLLUTION BULLETIN, 199, 116009. Cite
Viana, A. P., Le Loc’h, F., Fredou, T., Lucena-Fredou, F., Menard, F., Lagane, C., Munaron, J.-M., Lira, A. S., dos Santos, I. G. S., Ferreira, V., Gonzalez, J. G., & Point, D. (2023). Mercury biomagnification and trophic structure patterns in neotropical coastal estuaries impacted by a Chlor-alkali plant in northeast Brazil. REGIONAL STUDIES IN MARINE SCIENCE, 66, 103105. Cite
Cipolloni, O.-A., Baudrimont, M., Simon-Bouhet, B., Dassie, E. P., Gigault, J., Connan, S., & Pascal, P.-Y. (2023). Kinetics of metal and metalloid concentrations in holopelagic Sargassum reaching coastal environments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 30(47). Cite
Wang, H., Halary, S., Duval, C., Bernard, C., Troussellier, M., Beniddir, M. A., Brunel, J.-M., Castaldi, A., Caudal, F., Gollety, C., Martin, C., Bourguet-Kondracki, M.-L., & Duperron, S. (2023). Diversity, metabolome profiling and bioactivities of benthic filamentous cyanobacteria isolated from coastal mangroves of Mayotte. FRONTIERS IN MARINE SCIENCE, 10, 1201594. Cite
Lira, A. S., Lucena-Fredou, F., Figueiredo Lacerda, C. H., Eduardo, L. N., Ferreira, V., Fredou, T., Menard, F., Angelini, R., & Le Loc’h, F. (2022). Effect of fishing effort on the trophic functioning of tropical estuaries in Brazil. Estuarine Coastal and Shelf Science, 277, 108040. Cite
Pelage, L., Ferreira, V., Lucena-Fredou, F., Ferreira, G. V. B., Gonzalez, J. G., Viana, A. P., Lira, A. S., Munaron, J.-M., Fredou, T., Mernard, F., & Le Loc’h, F. (2022). Estuarine food web structure and relative importance of organic matter sources for fish in a highly connected Northeastern Brazil ecotone. Estuarine Coastal and Shelf Science, 275, 107972. 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. 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. 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. 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. 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. 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. Cite
Anthony, E. J., Brunier, G., Gardel, A., & Hiwat, M. (2019). Chenier Morphodynamics on the Amazon-Influenced Coast of Suriname, South America: Implications for Beach Ecosystem Services. Frontiers in Earth Science, 7, UNSP 35. Cite
Mandal, S. K., Ray, R., Gonzalez, A. G., Mavromatis, V., Pokrovsky, O. S., & Jana, T. K. (2019). State of rare earth elements in the sediment and their bioaccumulation by mangroves: a case study in pristine islands of Indian Sundarban. Environmental Science and Pollution Research, 26(9), 9146–9160. Cite
Ray, R., & Weigt, M. (2018). Seasonal and habitat-wise variations of creek water particulate and dissolved organic carbon in arid mangrove (the Persian Gulf). Continental Shelf Research, 165, 60–70. Cite
Ray, R., Majumder, N., Chowdhury, C., Das, S., & Jana, T. K. (2018). Phosphorus Budget of the Sundarban Mangrove Ecosystem: Box Model Approach. Estuaries and Coasts, 41(4), 1036–1049. Cite
Walcker, R., Gandois, L., Proisy, C., Corenblit, D., Mougin, E., Laplanche, C., Ray, R., & Fromard, F. (2018). Control of “blue carbon” storage by mangrove ageing: Evidence from a 66-year chronosequence in French Guiana. Global Change Biology, 24(6), 2325–2338. 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. Cite
Ray, R., & Jana, T. K. (2017). Carbon sequestration by mangrove forest: One approach for managing carbon dioxide emission from coal-based power plant. Atmospheric Environment, 171(Supplement C), 149–154. 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. Cite
Jézéquel, R., Duboscq, K., Sylvi, L., Michaud, E., Ferriz, L. M., Roic, E., Duran, R., Cravo-laureau, C., Michotey, V., Bonin, P., Gilbert, F., Tedetti, M., Militon, C., & Cuny, P. (2017). Assessment of oil weathering and impact in mangrove ecosystem: PRISME Experiment. International Oil Spill Conference Proceedings, 2017, 634–656. Cite
Michaud, E. (2017). Assessing biogeomorphology using drones: new perspectives for large-scale bioturbation studies [Oral communication]. 5th Nereis Park Conference 2017, August, Southampton, NY, Etats-Unis. 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. Cite
Ray, R., & Shahraki, M. (2016). Multiple sources driving the organic matter dynamics in two contrasting tropical mangroves. Science of the Total Environment, 571, 218–227. Cite
Aschenbroich, A., Marchand, C., Molnar, N., Deborde, J., Hubas, C., Rybarczyk, H., & Meziane, T. (2015). Spatio-temporal variations in the composition of organic matter in surface sediments of a mangrove receiving shrimp farm effluents (New Caledonia). Science of the Total Environment, 512, 296–307. Cite
Aschenbroich, A., Michaud, E., Fromard, F., Gardel, A., Gilbert, F., Stieglitz, T., Aller, R. C., Tavares, M., Alt, A., Bihannic, I., Garrec, V. L., & Thouzeau, G. (2015). Bioturbation functional roles exhibited by the mangrove benthic communities in French Guiana [Oral communication]. 1st conférence internationale sur le littoral de Guyane sous influence amazonienne. 24-28 Novembre, Cayenne, Guyane française. Cite
Paillon, C., Wantiez, L., Kulbicki, M., Labonne, M., & Vigliola, L. (2014). Extent of Mangrove Nursery Habitats Determines the Geographic Distribution of a Coral Reef Fish in a South-Pacific Archipelago. PloS One, 9(8), e105158. Cite
Bodin, N., N’Gom-Kâ, R., Kâ, S., Thiaw, O. T., Tito-de-Morais, L., Le Loc’h, F., Rozuel-Chartier, E., Auger, D., & Chiffoleau, J.-F. (2013). Assessment of trace metal contamination in mangrove ecosystems from Senegal, West Africa. Chemosphere, 90(2), 150–157. Cite
Queiroga, F. R., Marques-Santos, L. F., Hégaret, H., Soudant, P., Farias, N. D., Schlindwein, A. D., & Da Silva, P. M. (2013). Immunological responses of the mangrove oysters Crassostrea gasar naturally infected by Perkinsus sp. in the Mamanguape Estuary, Paraíba state (Northeastern, Brazil). Fish & Shellfish Immunology, 35(2), 319–327. Cite
Bodin, N., Ka, R., Le Loc’h, F., Raffray, J., Budzinski, H., Peluhet, L., & Tito-de-Morais, L. (2011). Are exploited mangrove molluscs exposed to persistent organic pollutant contamination in Senegal, West Africa? Chemosphere, 84(3), 318–327. Cite

The team


  • Thierry le Bec
  • Vincent Le Garrec
  • Emilie Grosstephan
Collaborations internationales :
  • School of Marine and Atmospheric Sciences, Stony Brook University (USA)
  • University of Sao Paulo, Brazil
  • Université Federale de Fluminense, Brazil
  • Institut National de la Recherche Scientifique, Canada
  • Max Planck Institute for Biogeochemistry, Germany
Collaborations nationales :
  • UMR BOREA, Muséum Nationale d’Histoire Naturelle (Paris)
  • CEREGE, Aix Marseille University (Aix en Provence)
  • UMR ECOLAB, University of Paul Sabatier (Toulouse) 
  • Mediterranean Institute of Oceanography (Marseille)
  • USR LEEISA (Guyane)
  • UMR LEGOS (Toulouse)
  • Laboratoire des environnements Profonds (LEP), Ifremer (Brest)
  • UMR LGO, University of Western Brittany (Brest)
  • UMR LOG, University of Cote d’Opale (Lille)