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Yannick Agnan

Professeur

SST/AGRO Faculté des bioingénieurs (AGRO)

SST/ELI Earth and Life Institute (ELI)

SST/ELI/ELIE Environmental Sciences (ELIE)

  • Expertise :
  • soil
  • air
  • pollution
  • biogeochemistry
  • environment
  • biomonitoring
  • metal
  • pesticide

My research activities aim to study dynamics of contaminants, such as trace elements and pesticides, as well as organic matter at the interfaces of terrestrial compartments: atmosphere, pedosphere, hydrosphere, cryosphere, and biosphere. I am interested in contrasting environments, whether natural (temperate forests and polar ecosystems) or anthropogenic (agroecosystems and urban environments). For a better understanding of transfer processes, I use several geochemical tracers, such as stable isotopes and rare earth elements.

Année Libellé Établissement
2013 Doctorat ENSAT (France)
2010 Master 2 Toulouse III (France)
2007 Master 1 Toulouse III (France)
2006 Licence Toulouse III (France)
2026
Article de journal

Counoy, H., Matthée, Z., Ferreira Lerche, G., Turcati, L., & Agnan, Y. (2026). Tracking atmospheric trace elements in a historically impacted region using lichens as biomonitors: past trends and spatial contrast. Environmental Research, 303, 124791. https://doi.org/10.1016/j.envres.2026.124791 (Original work published 2026)


Arbalestrie, B., Van de Casteele, A., Quénéa, K., Baudin, F., Anquetil, C., Bemelmans, N., & Agnan, Y. (2026). Contrasting influence of exogenous organic matter application on the transfer of trace elements from soil to plants. Science of the Total Environment, 1043, 181932. https://doi.org/10.1016/j.scitotenv.2026.181932 (Original work published 2026)


Buron, M., Foguenne, E., Blondel, A., Marchetti, T., Jeannerod, L., Defourny, P., Radoux, J., & Agnan, Y. (2026). Predicting soil neonicotinoid content in agricultural landscapes using indirect indicators. Journal of Hazardous Materials, 501(1), 140794. https://doi.org/10.1016/j.jhazmat.2025.140794 (Original work published 2026)


Vandevoorde, N., Turine, I., Blondel, A., & Agnan, Y. (2026). Living cover crops alter the fate of pesticide residues in soil: influence of pesticide physicochemical properties. SOIL, 12(1), 17-35. https://doi.org/10.5194/soil-12-17-2026 (Original work published 2026)


2025
Article de journal

Vandevoorde, N., Per Kudsk, Agnan, Y., & Baret, P. (2025). Five methodological updates of the Danish Pesticide Load Indicator to support EU-wide pesticide risk reduction policies. Environmental Research Letters, 20, 124070. https://doi.org/10.1088/1748-9326/ae269b (Original work published 2025)


Vandevoorde, N., Turine, I., Blondel, A., & Agnan, Y. (2025). Living cover crops reduce pesticide residues in agricultural soil. SOIL. Published. https://doi.org/10.5194/egusphere-2025-943 (Original work published 2025)


Counoy, H., Turcati, L., Bogaert, P., Agnello, G., Austruy, A., Batič, F., Biache, C., Boucheron, C., Brancaleoni, L., Branquinho, C., Castello, M., Catalano, I., Cioffi, M., Dron, J., Duflo, C., Ferrez, Y., Garrido‐Benavent, I., Gattus, J.-C., Gerdol, R., et al. (2025). Towards a new interpretative framework for air quality and climate biomonitoring with lichens: a meta‐analysis of surveys using the European protocol. Global Change Biology, 31(12), e70632. https://doi.org/10.1111/gcb.70632 (Original work published 2025)


Gancedo Tarano, I., Boumal, T., De Toffoli, M., Buron, M., Kiljanek, T., Martel, A.-C., Jacquemart, A.-L., & Agnan, Y. (2025). Are cover crops a potential threat for pollinators due to clothianidin residues in floral resources? Environmental Monitoring and Assessment : an international journal devoted to progress in the use of monitoring data in assessing environmental risks to man and the environment, 197(1), 1260. https://doi.org/10.1007/s10661-025-14741-9 (Original work published 2025)


2024
Article de journal

Potier, H. M. G., Raynaud, X., Agnan, Y., Allain, A., Rouelle, M., Vaury, V., Abbadie, L., & Alexis, M. A. (2024). Carbon and nitrogen stocks and distributions associated with different vegetation covers and soil profiles in Abisko, northern Sweden. Arctic Science, 1(1), 1. https://doi.org/10.1139/as-2023-0049 (Original work published 2024)


Bemelmans, N., Dejardin, R., Arbalestrie, B., & Agnan, Y. (2024). Glyphosate application may influence the transfer of trace elements from soils to both soil solutions and plants. Chemosphere, 143603(1), 1. https://doi.org/10.1016/j.chemosphere.2024.143603 (Original work published 2024)


2023
Article de journal

Zhang, Y., Zhang, P., Song, Z., Huang, S., Yuan, T., Wu, P., Shah, V., Liu, M., Chen, L., Wang, X., Zhou, J., & Agnan, Y. (2023). An updated global mercury budget from a coupled atmosphere-land-ocean model: 40% more re-emissions buffer the effect of primary emission reductions. One Earth, 6(3), 316-325. https://doi.org/10.1016/j.oneear.2023.02.004 (Original work published 2023)


Bemelmans, N., Arbalestrie, B., Dailly, H., Bodart, E., & Agnan, Y. (2023). Influence of glyphosate and aminomethylphosphonic acid on the mobility of trace elements in uncontaminated and contaminated agricultural soils. Environmental Science and Pollution Research, 1(1), 1. https://doi.org/10.1007/s11356-023-29660-w (Original work published 2023)


Counoy, H., Turcati, L., Lorrillière, R., Bénateau, S., Maalouf, J.-P., Agnello, G., Turpin, S., & Agnan, Y. (2023). Performance evaluation and applicability of Lichens GO, a citizen science-based protocol for urban air quality monitoring. Ecological Indicators, 150(1), 110269. https://doi.org/10.1016/j.ecolind.2023.110269 (Original work published 2023)


2022
Article de journal

Jeannerod, L., Carlier, A., Schatz, B., Daise, C., Richel, A., Agnan, Y., Baude, M., Jacquemart, A.-L., & Del-Claro, K. (2022). Some bee-pollinated plants provide nutritionally incomplete pollen amino acid resources to their pollinators. PLOS ONE, 17(8), e0269992. https://doi.org/10.1371/journal.pone.0269992 (Original work published 2022)


Mauclet, E., Agnan, Y., Hirst, C., Monhonval, A., Pereira, B., Vandeuren, A., Villani, M., Ledman, J., Taylor, M., Jasinski, B. L., Schuur, E. A. G., & Opfergelt, S. (2022). Changing sub-Arctic tundra vegetation upon permafrost degradation: impact on foliar mineral element cycling. Biogeosciences, 19(9), 2333-2351. https://doi.org/10.5194/bg-19-2333-2022 (Original work published 2022)


Allain, A., Alexis, M. A., Bridoux, M. C., Humbert, G., Agnan, Y., & Rouelle, M. (2022). Fingerprinting the elemental composition and chemodiversity of vegetation leachates: consequences for dissolved organic matter dynamics in Arctic environments. Biogeochemistry : an international journal, 1(1), 1. https://doi.org/10.1007/s10533-022-00925-9 (Original work published 2022)


Arbalestrie, B., Falys, J., Bemelmans, N., Thami, A., Monin, L., Devos, E., & Agnan, Y. (2022). Rare earth elements in an intercropping cover crop to evaluate the trace element transfer from soil to plant. Biogeochemistry : an international journal, 161(1), 373-387. https://doi.org/10.1007/s10533-022-00989-7 (Original work published 2022)


Villani, M., Mauclet, E., Agnan, Y., Druel, A., Jasinski, B., Taylor, M., Schuur, E. A. G., & Opfergelt, S. (2022). Mineral element recycling in topsoil following permafrost degradation and a vegetation shift in sub-Arctic tundra. Geoderma, 421, 115915. https://doi.org/10.1016/j.geoderma.2022.115915 (Original work published 2022)


2021
Article de journal

Mauclet, E., Agnan, Y., Hirst, C., Monhonval, A., Taylor, M., Ledman, J., Schuur, E., & Opfergelt, S. (2021). What are the impacts of shifting Arctic tundra vegetation? Open Access Government, European Union(April 2021), 232. (Original work published 2021)


Boumal, T., De Toffoli, M., Kiljanek, T., Martel, A.-C., Agnan, Y., & Jacquemart, A.-L. (2021). Are intercropping cover crops a potential threat for pollinators due to neonicotinoid residues in floral resources? Preprints, 13. (Original work published 2021)


Ayari, J., Barbieri, M., Agnan, Y., Sellami, A., Braham, A., Dhaha, F., & Charef, A. (2021). Trace element contamination in the mine-affected stream sediments of Oued Rarai in north-western Tunisia: a river basin scale assessment. Environmental Geochemistry and Health : official journal of the Society for Environmental Geochemistry and Health, 1(1), 1. https://doi.org/10.1007/s10653-021-00887-1 (Original work published 2021)


2020
Article de journal

Howard, D., Agnan, Y., Helmig, D., Yang, Y., & Obrist, D. (2020). Environmental controls on ecosystem-scale cold-season methane and carbon dioxide fluxes in an Arctic tundra ecosystem. Biogeosciences, 17(1), 4025-4042. https://doi.org/10.5194/bg-17-4025-2020 (Original work published 2020)


Agnan, Y. (2020). Les lichens épiphytes : sentinelles de la qualité de l’air. Carnets des espaces naturels, 6(1), 28-29. (Original work published 2020)


De Toffoli, M., Falys, H., Kiljanek, T., Agnan, Y., & Jacquemart, A.-L. (2020). L’étude de néonicotinoides en culture betteravière. Sillon Belge, 01/10, 12. (Original work published 2020)


Bouchard, F., Agnan, Y., Bröder, L., Fouché, J., Hirst, C., Sjöberg, Y., Alexis M, Behmel S, Biskaborn B, Christaki U, Dean J, Desyatkin A, Farquharson L, Fishback L, Fortier D, Fritz M, Gandois G, Hugelius L, Jardillier L, et al. (2020). The SPLASH Action Group - Towards standardized sampling strategies in permafrost science. Advances in Polar Science, 31(3), 153-155. https://doi.org/10.13679/j.advps.20 20.0009 (Original work published 2020)


2019
Article de journal

Agnan, Y., Courault, R., Alexis, M. A., Zanardo, T., Cohen, M., Sauvage, M., & Castrec-Rouelle, M. (2019). Distribution of trace and major elements in subarctic ecosystem soils: Sources and influence of vegetation. Science of the Total Environment, 682(1), 650-662. https://doi.org/10.1016/j.scitotenv.2019.05.178 (Original work published 2019)


Khan, T. R., Obrist, D., Agnan, Y., Selin, N. E., & Perlinger, J. A. (2019). Atmosphere-terrestrial exchange of gaseous elemental mercury: parameterization improvement through direct comparison with measured ecosystem fluxes. Environmental Science Processes & Impacts, 21(10), 1699-1712. https://doi.org/10.1039/c9em00341j (Original work published 2019)


Osterwalder, S., Huang, J.-H., Shetaya, W. H., Agnan, Y., Frossard, A., Frey, B., Alewell, C., Kretzschmar, R., Biester, H., & Obrist, D. (2019). Mercury emission from industrially contaminated soils in relation to chemical, microbial, and meteorological factors. Environmental Pollution, 250(1), 944-952. https://doi.org/10.1016/j.envpol.2019.03.093 (Original work published 2019)


Jiskra, M., Sonke, J. E., Agnan, Y., Helmig, D., & Obrist, D. (2019). Insights from mercury stable isotopes on terrestrial–atmosphere exchange of Hg(0) in the Arctic tundra. Biogeosciences, 16(20), 4051-4064. https://doi.org/10.5194/bg-16-4051-2019 (Original work published 2019)


2018
Article de journal

Dauphin, C.-E., Dron, J., Austruy, A., Agnan, Y., Granier, V., & Chamaret, P. (2018). Participation de citoyens volontaires de la population locale dans les mesures de la qualité de l’air autour de la zone industrielle de Fos-sur-Mer. Pollution Atmospherique, 236(1), 1-10. https://doi.org/10.4267/pollution-atmospherique.6502 (Original work published 2018)


Agnan, Y., Douglas, T. A., Helmig, D., Hueber, J., & Obrist, D. (2018). Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges. The Cryosphere, 12(6), 1939-1956. https://doi.org/10.5194/tc-12-1939-2018 (Original work published 2018)


2017
Article de journal

Agnan, Y., Probst, A., & Séjalon-Delmas, N. (2017). Evaluation of lichen species resistance to atmospheric metal pollution by coupling diversity and bioaccumulation approaches: A new bioindication scale for French forested areas. Ecological Indicators, 72(1), 99-110. https://doi.org/10.1016/j.ecolind.2016.08.006 (Original work published 2017)


Obrist, D., Agnan, Y., Jiskra, M., Olson, C. L., Colegrove, D. P., Hueber, J., Moore, C. W., Sonke, J. E., & Helmig, D. (2017). Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution. Nature, 547(7662), 201-204. https://doi.org/10.1038/nature22997 (Original work published 2017)


2016
Article de journal

Agnan, Y., Le Dantec, T., Moore, C. W., Edwards, G. C., & Obrist, D. (2016). New Constraints on Terrestrial Surface–Atmosphere Fluxes of Gaseous Elemental Mercury Using a Global Database. Environmental Science & Technology (Washington), 50(2), 507-524. https://doi.org/10.1021/acs.est.5b04013 (Original work published 2015)


Ayari, J., Agnan, Y., & Charef, A. (2016). Spatial assessment and source identification of trace metal pollution in stream sediments of Oued El Maadene basin, northern Tunisia. Environmental Monitoring and Assessment : an international journal devoted to progress in the use of monitoring data in assessing environmental risks to man and the environment, 188(7), 397. https://doi.org/10.1007/s10661-016-5402-4 (Original work published 2016)


Dron, J., Austruy, A., Agnan, Y., Ratier, A., & Chamaret, P. (2016). Utilisation de la biosurveillance lichénique sur la zone industrialo-portuaire de Fos-sur-Mer : retour sur trois ans de suivi à l’échelle d’un territoire intercommunal. Pollution Atmospherique, 228(1), 1-17. https://doi.org/10.4267/pollution-atmospherique.5392 (Original work published 2016)


2015
Article de journal

Agnan, Y., Séjalon-Delmas, N., Claustres, A., & Probst, A. (2015). Investigation of spatial and temporal metal atmospheric deposition in France through lichen and moss bioaccumulation over one century. Science of the Total Environment, 529(1), 285-296. https://doi.org/10.1016/j.scitotenv.2015.05.083 (Original work published 2015)


2014
Article de journal

Gandois, L., Agnan, Y., Leblond, S., Séjalon-Delmas, N., Le Roux, G., & Probst, A. (2014). Use of geochemical signatures, including rare earth elements, in mosses and lichens to assess spatial integration and the influence of forest environment. Atmospheric Environment, 95(1), 96-104. https://doi.org/10.1016/j.atmosenv.2014.06.029 (Original work published 2014)


Agnan, Y., Séjalon-Delmas, N., & Probst, A. (2014). Origin and distribution of rare earth elements in various lichen and moss species over the last century in France. Science of the Total Environment, 487(1), 1-12. https://doi.org/10.1016/j.scitotenv.2014.03.132 (Original work published 2014)


2013
Article de journal

Agnan, Y., Séjalon-Delmas, N., & Probst, A. (2013). Comparing early twentieth century and present-day atmospheric pollution in SW France: A story of lichens. Environmental Pollution, 172(1), 139-148. https://doi.org/10.1016/j.envpol.2012.09.008 (Original work published 2013)


2011
Article de journal

Civeyrel, L., Leclercq, J., Demoly, J.-P., Agnan, Y., Quèbre, N., Pélissier, C., & Otto, T. (2011). Molecular systematics, character evolution, and pollen morphology of Cistus and Halimium (Cistaceae). Plant Systematics and Evolution : Entwicklungsgeschichte und Systematik der Pflanzen, 295(1-4), 23-54. https://doi.org/10.1007/s00606-011-0458-7 (Original work published 2011)


Unités d'enseignement pour 2025

Libellé Code
Bioingénieurs, Développements Durables et Transitions LBIR1100
Projet intégré en diagnostic environnemental LBIR1270
Sciences du sol et excursions intégrées LBIR1336
Productions végétales LBIRA2108
Pédologie appliquée LBIRE2104
Evaluation de la qualité eau - sol - air LBIRE2105
Évaluation d'impact environnemental: projet et introduction à la gestion de bases de données LBIRE2130
Projet intégré en gestion de la pollution LBIRE2231
Pollution de l'environnement LENVI2012