Matthieu Bressac

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Matthieu Bressac

Marine Biogeochemistry

Room 2nd floor – Desk #213.19 , IMAS Hobart Waterfront Building

Dr Matthieu Bressac is a Postdoctoral Research Fellow at the Institute for Marine and Antarctic Studies. His research focuses on carbon and iron biogeochemistry, and combines field and laboratory works to explore how these two elements are recycled in the mesopelagic zone (100-1000 m).


Dr Bressac graduated in 2013 with a PhD in Biogeochemical Oceanography at the University Pierre et Marie Curie (Paris VI, France). His thesis focused on the impacts of dust deposition on the ocean iron cycle and carbon export. He then worked as a Postdoctoral Fellow at the International Atomic Energy Agency Marine Environment Laboratories (IAEA-MEL, Monaco) to develop new techniques for the analysis of radionuclides in seawater. Between 2014 and 2017, Dr Bressac was awarded a Marie Curie Postdoctoral Fellowship and worked at the Institute for Marine and Antarctic Studies (IMAS, Australia) and at the Laboratory of Oceanography of Villefranche (LOV, France) to investigate the implications of the mesopelagic remineralization for the ocean iron cycle.


Marie Curie International Outgoing Fellowship (2014-2017).

Career summary




University Pierre et Marie Curie, Paris VI





University Aix-Marseille II





University Claude Bernard Lyon 1



Languages (other than English)


View more on Dr Matthieu Bressac in WARP


Dissolved and particulate trace elements sampling and analysis

In situ mesopelagic remineralization rate measurements

Sediment trap deployment and analysis

Optical and particle size distribution measurements

Actinides analysis

Phytoplankton culturing

Research Themes

Matthieu’s research aligns to the University’s research theme of Marine, Antarctic and Maritime. His research interests include carbon and iron biogeochemistry, and in particular the fate of these elements in the mesopelagic (100-1000 m). Notably, Matthieu has developed a new instrument able to measure the bacterial remineralization of particulate iron at in situ pressure and temperature conditions. This instrument has been successfully deployed within the upper mesopelagic (100-200 m) of the Subantarctic Zone and Mediterranean Sea.


Matthieu is currently involved in four international projects which aim at better understanding the factors controlling the biological carbon pump, and in particular the export of carbon to the deep ocean. These projects involve collaboration with scientists from the US, France, and Australia.


Marie Curie Postdoctoral Fellowship (2014-2017)

Current projects

Geoengineering the Southern Ocean? A transdisciplinary assessment (ARC Laureate Fellowship,

Fields of Research

  • Oceanography (370899)
  • Biological oceanography (370801)
  • Chemical oceanography (370802)
  • Marine and estuarine ecology (incl. marine ichthyology) (310305)

Research Objectives

  • Oceanic processes (excl. in the Antarctic and Southern Ocean) (180506)
  • Expanding knowledge in the earth sciences (280107)
  • Other environmental management (189999)
  • Climate change mitigation strategies (190301)
  • Expanding knowledge in the biological sciences (280102)
  • Ecosystem adaptation to climate change (190102)
  • Expanding knowledge in the environmental sciences (280111)
  • Antarctic and Southern Ocean oceanic processes (180402)
  • Measurement and assessment of marine water quality and condition (180505)


Total publications


Journal Article

(18 outputs)
2022Fourquez M, Strzepek RF, Ellwood MJ, Hassler C, Cabanes D, et al., 'Phytoplankton responses to bacterially regenerated iron in a Southern Ocean eddy', Microorganisms, 10, (8) Article 1655. ISSN 2076-2607 (2022) [Refereed Article]

DOI: 10.3390/microorganisms10081655 [eCite] [Details]

Co-authors: Fourquez M; Strzepek RF; Deppeler S; Trull TW; Boyd PW


2020Fourquez M, Bressac M, Deppeler SL, Ellwood M, Obernosterer I, et al., 'Microbial competition in the subpolar southern ocean: an Fe-C Co-limitation experiment', Frontiers in Marine Science, 6, (JAN) Article 776. ISSN 2296-7745 (2020) [Refereed Article]

DOI: 10.3389/fmars.2019.00776 [eCite] [Details]

Citations: Scopus - 16Web of Science - 15

Co-authors: Fourquez M; Deppeler SL; Trull TW; Boyd PW


2020Tovar-Sanchez A, Rodriguez-Romero A, Engel A, Zancker B, Fu F, et al., 'Characterizing the surface microlayer in the Mediterranean Sea: trace metal concentrations and microbial plankton abundance', Biogeosciences, 17, (8) pp. 2349-2364. ISSN 1726-4170 (2020) [Refereed Article]

DOI: 10.5194/bg-17-2349-2020 [eCite] [Details]

Citations: Scopus - 17Web of Science - 18


2020Whitby H, Bressac M, Sarthou G, Ellwood MJ, Guieu C, et al., 'Contribution of electroactive humic substances to the iron-binding ligands released during microbial remineralization of sinking particles', Geophysical Research Letters, 47, (7) Article e2019GL086685. ISSN 0094-8276 (2020) [Refereed Article]

DOI: 10.1029/2019GL086685 [eCite] [Details]

Citations: Scopus - 7Web of Science - 7

Co-authors: Boyd PW


2019Bressac M, Guieu C, Ellwood MJ, Tagliabue A, Wagener T, et al., 'Resupply of mesopelagic dissolved iron controlled by particulate iron composition', Nature Geoscience, 12 pp. 995-1000. ISSN 1752-0894 (2019) [Refereed Article]

DOI: 10.1038/s41561-019-0476-6 [eCite] [Details]

Citations: Scopus - 20Web of Science - 19

Co-authors: Laurenceau-Cornec EC; Boyd PW


2019Cavan EL, Laurenceau-Cornec EC, Bressac M, Boyd PW, 'Exploring the ecology of the mesopelagic biological pump', Progress in Oceanography, 176 Article 102125. ISSN 0079-6611 (2019) [Refereed Article]

DOI: 10.1016/j.pocean.2019.102125 [eCite] [Details]

Citations: Scopus - 34Web of Science - 29

Co-authors: Cavan EL; Laurenceau-Cornec EC; Boyd PW


2019Meskhidze N, Volker C, Al-Abadleh HA, Barbeau K, Bressac M, et al., 'Perspective on identifying and characterizing the processes controlling iron speciation and residence time at the atmosphere-ocean interface', Marine Chemistry, 217 Article 103704. ISSN 0304-4203 (2019) [Refereed Article]

DOI: 10.1016/j.marchem.2019.103704 [eCite] [Details]

Citations: Scopus - 34Web of Science - 32


2017Bressac M, Levy I, Chamizo E, La Rosa JJ, Povinec J, et al., 'Temporal evolution of 137Cs, 237Np, and 239+240Pu and estimated vertical 239+240Pu export in the northwestern Mediterranean Sea', Science of The Total Environment, 595 pp. 178-190. ISSN 0048-9697 (2017) [Refereed Article]

DOI: 10.1016/j.scitotenv.2017.03.137 [eCite] [Details]

Citations: Scopus - 11Web of Science - 9


2016Boyd PW, Bressac M, 'Developing a test-bed for robust research governance of geoengineering: the contribution of ocean iron biogeochemistry', Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374, (2081) Article 20150299. ISSN 1364-503X (2016) [Refereed Article]

DOI: 10.1098/rsta.2015.0299 [eCite] [Details]

Citations: Scopus - 8Web of Science - 6

Co-authors: Boyd PW


2016Chamizo E, Lopez-Lora M, Bressac M, Levy I, Pham MK, 'Excess of 236U in the northwest Mediterranean Sea', Science of the Total Environment, 565 pp. 767-776. ISSN 0048-9697 (2016) [Refereed Article]

DOI: 10.1016/j.scitotenv.2016.04.142 [eCite] [Details]

Citations: Scopus - 21Web of Science - 21


2015Louis J, Bressac M, Pedrotti ML, Guieu C, 'Dissolved inorganic nitrogen and phosphorus dynamics in seawater following an artificial Saharan dust deposition event', Frontiers in Marine Science, 2 Article 27. ISSN 2296-7745 (2015) [Refereed Article]

DOI: 10.3389/fmars.2015.00027 [eCite] [Details]

Citations: Scopus - 12Web of Science - 12


2014Bressac M, Guieu C, Doxaran D, Bourrin F, Desboeufs K, et al., 'Quantification of the lithogenic carbon pump following a simulated dust-deposition event in large mesocosms', Biogeosciences, 11 pp. 1007-1020. ISSN 1726-4170 (2014) [Refereed Article]

DOI: 10.5194/bg-11-1007-2014 [eCite] [Details]

Citations: Scopus - 39Web of Science - 42


2014Guieu C, Ridame C, Pulido-Villena E, Bressac M, Desboeufs K, et al., 'Impact of dust deposition on carbon budget: a tentative assessment from a mesocosm approach', Biogeosciences, 11, (19) pp. 5621-5635. ISSN 1726-4170 (2014) [Refereed Article]

DOI: 10.5194/bg-11-5621-2014 [eCite] [Details]

Citations: Scopus - 29Web of Science - 29


2013Bressac M, Guieu C, 'Post-depositional processes: what really happens to new atmospheric iron in the ocean's surface?', Global Biogeochemical Cycles, 27, (3) pp. 859-870. ISSN 0886-6236 (2013) [Refereed Article]

DOI: 10.1002/gbc.20076 [eCite] [Details]

Citations: Scopus - 26Web of Science - 24


2013Dekaezemacker J, Bonnet S, Grosso O, Moutin T, Bressac M, et al., 'Evidence of active dinitrogen fixation in surface waters of the eastern tropical South Pacific during El Nino and La Nina events and evaluation of its potential nutrient controls', Global Biogeochemical Cycles, 27, (3) pp. 768-779. ISSN 0886-6236 (2013) [Refereed Article]

DOI: 10.1002/gbc.20063 [eCite] [Details]

Citations: Scopus - 58Web of Science - 57


2013Wuttig K, Wagener T, Bressac M, Dammshauser A, Streu P, et al., 'Impacts of dust deposition on dissolved trace metal concentrations (Mn, Al and Fe) during a mesocosm experiment', Biogeosciences, 10 pp. 2583-2600. ISSN 1726-4170 (2013) [Refereed Article]

DOI: 10.5194/bg-10-2583-2013 [eCite] [Details]

Citations: Scopus - 44Web of Science - 43

Co-authors: Wuttig K


2012Bressac M, Guieu C, Doxaran D, Bourrin F, Obolensky G, et al., 'A mesocosm experiment coupled with optical measurements to assess the fate and sinking of atmospheric particles in clear oligotrophic waters', Geo-Marine Letters, 32, (2) pp. 153-164. ISSN 0276-0460 (2012) [Refereed Article]

DOI: 10.1007/s00367-011-0269-4 [eCite] [Details]

Citations: Scopus - 27Web of Science - 25


2010Moingt M, Bressac M, Belanger D, Amyot M, 'Role of ultra-violet radiation, mercury and copper on the stability of dissolved glutathione in natural and artificial freshwater and saltwater', Chemosphere, 80, (11) pp. 1314-1320. ISSN 0045-6535 (2010) [Refereed Article]

DOI: 10.1016/j.chemosphere.2010.06.041 [eCite] [Details]

Citations: Scopus - 21Web of Science - 20


Marie Curie International Outgoing Fellowship (2014-2017)