Vincent Jassey

Chargé de Recherches

CRCN (HDR) INEE

Email : vincent.jasseyDear bot, you won't get my mail address@and my domain...univ-tlse3.fr

Écologie des Communautés : Interactions, Interfaces et Contraintes (CIRCE)

Address :

Laboratoire Ecologie Fonctionnelle et Environnement
118 route de Narbonne
Bâtiment 4R1
31062 Toulouse

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CV / functions

Employment

01/2017 – current: Researcher at The National Center for Scientific Research (CNRS)- Functional Ecology and Environment laboratory (EcoLab), University of Paul Sabatier III, Toulouse (France)

01/2015 – 12/2016: Post-Doctoral position at the Swiss Federal Institute for Forest, Snow and Landscape (WSL) in the Research Unit Community Ecology (Site Lausanne, ECOS group led by Prof. A. Buttler, Switzerland). SNF grant / SPHAGNOL project. PI: Prof. Luca Bragazza.

04/2012 – 12/2014: Post-Doctoral position at the Swiss Federal Institute for Forest, Snow and Landscape WSL in the Research Unit Community Ecology (Site Lausanne, ECOS group led by Prof. A. Buttler, Switzerland) and Adam Mickiewicz University of Poznan (Poland). Swiss Contribution/Polish-Swiss Research grant; CLIMPEAT project. PI: Prof. Mariusz Lamentowicz.

12/2011 – 03/2012: Post-Doctoral position at Chrono-Environnement Laboratory (Montbéliard, France). Supervised by Prof. Nadine Bernard

10/2011 – 11/2012: Post-Doctoral position at Soil Biology Laboratory (Neuchâtel, Switzerland). Supervised by Prof. Edward Mitchell.

Education

05/2022: Habilitation à Diriger la Recherche (HDR) from Paul Sabatier University, Toulouse, France.

10/2008-11/2011: Ph.D. at Chrono-Environnement Laboratory (Montbéliard, France). Supervised by Prof. Daniel Gilbert, Dr. Geneviève Chiapusio and Dr. Philippe Binet. Awarded with the highest honours.

Research

I am a community ecologist studying the relationships between species, populations and communities in the context of environmental change. My research aims at understanding the structure and function of communities, and how their response matter for ecosystem functioning and services. Particularly, I’m interested at understanding the response of communities and their function to climate change, and how these changes play out in ecosystem functioning.

TROPHIC INTERACTIONS

Plant-plant, plant-soil and plant-microbe interactions play a fundamental role in community structure and dynamics and in ecosystem functioning. In my research, I aim at understanding how these interactions modify or improve the functioning of ecosystems. Recently, I focused my research on the role of plant secondary metabolites in driving soil microbial food web structure and functioning. In addition, I am interested in determining the role of plant diversity and cover on soil food web and ecosystem functions such as productivity, decomposition, and nutrient cycling. Finally, I aim to develop more research on trophic interactions within food webs, especially concerning the role of mixotrophic organisms -organisms that mix up their role in food webs as either autotrophs or heterotrophs.

CLIMATE CHANGE

Climate is one of the major drivers of species distributions and interactions in ecosystems. However, climate changes are are expected to shift species distributions or modify their abundance and dominance patterns, generating novel communities composed of new combinations of species. These changes are likely to perturb ecosystem functioning. My research aims at understanding what makes plant and microbial communities resilient to external changes, and what makes them fragile. In my previous work in peatlands, I highlighted the importance of extreme warming events in shifting plant-plant, plant-soil and microbe-microbe interactions. Moreover, I am also interested in exploring the relative importance of the different components of climate change (e.g. warming, flooding, drought etc.) and in showing how these factors together drive ecosystem functions. Ecological communities and species interactions respond to changing climate in different way; some of them unexpectedly break down (losses of species and functions) rapidly while others resist longer to perturbations. I am developing research aiming at understanding the response of ecosystems to climate changes and trying to identify tipping points which could explain the difference in response of communities to extreme climatic events.

Responsibilities

Grants awarded

2021-2022: CNRS-INSU EC2CO: MApping the contribution of Phototrophic microbes to the global carbon cycle of Peatlands (MAPP) – 20k€.

2019-2021: Centre for the Study of Biodiversity in Amazonia (CEBA: ANR-10-LABX-25-01): Effects of simulated nitrogen deposition on the epiphytic BRYOsphere in a TROPical rainforest (BRYOTROP) | Funded by Centre for the Study of Biodiversity in Amazonia (CEBA:ANR-10-LABX-25-01) – 14k€.

2018-2022: French Agency for Research (ANR-2017-CE01-007) – Young researcher grant (ANR-JCJC): Rethinking the peatland carbon cycle – identifying the role of mixotrophs in the biological carbon pump / Repenser le cycle du carbone des tourbières : identifier le rôle des protistes mixotrophes dans la pompe à carbone biologique – 313k€. Principal Investigator

2015 – 2016: Swiss National Science Foundation project funding grant: Allelochemical arms race in peatlands; the role of polyphenols in aboveground-belowground interactions (Sphagnol) – 220k€. Co-Principal Investigator

Publications

My full publication list is available at: https://vjasseyecology.wordpress.com/publications/

Recent publications

Leroy M, Pey P, Jassey VEJ, Liné C, Elger E, Probst A, Flahaut E, Silvestre J, Larue C. Interactive effects of metals and carbon nanotubes in a microcosm agrosystem. J Hazard Mater. 431:128613 (2022)

Sytiuk, A., Céréghino, R., Hamard, S., …, Jassey, V.E.J. Biochemical traits enhance the trait concept in Sphagnum ecology. Oikos 00, 00 (2022).

Jassey VEJ Walcker R, Geisen S, Kardol P, Heger T, Lamentowicz M, Hamard S, Lara E.Contribution of soil algae to the global carbon cycle. New Phytol. 00, 00–00 (2022).

Gavazov K, Canarini A, Jassey VEJ, Mills R, Richter A, Sundqvist MK, Väisänen M, Walker TWN, Wardle DA, Dorrepaal E. Plant-microbial linkages underpin carbon sequestration in contrasting mountain tundra vegetation types. Soil Biol. Biochem. 165, 108530 (2022).

Walker TWN, Alexander J,…, Jassey VEJ, …, Salguero-Gomez R. Functional Traits 2.0: The power of the metabolome for ecology. J. Ecol. 110, 4–20 (2022).

Hamard S., Küttim M., Céréghino R., Jassey V.E.J. (2021) Peatland microhabitat heterogeneity drives phototrophic microbes distribution and photosynthetic activity. Environmental Microbiology 00.

Hamard S., Céréghino R., Barret M., Sytiuk A., …, Jassey V.E.J. (2021) Contribution of microbial photosynthesis to peatland carbon uptake along a latitudinal gradient. Journal of Ecology: 1365-2745.13732.

Sytiuk A., Céréghino R., Hamard S., …, Jassey V.E.J. (2021) Predicting the structure and functions of peatland microbial communities from Sphagnum phylogeny, anatomical and morphological traits and metabolites. Journal of Ecology: 1365-2745.13728.

Heffernan L., Jassey V.E.J., Frederickson M., MacKenzie M.D., Olefeldt D. (2021) Constraints on potential enzyme activities in thermokarst bogs: implications for the carbon balance of peatlands following thaw. Global Change Biology: 1–16.

Barel, J. M., Moulia, V., Hamard, S., Sytiuk, A., and Jassey, V. E. J. (2021). Come Rain , Come Shine : Peatland Carbon Dynamics Shift Under Extreme Precipitation. 9, 1–16. doi:10.3389/fenvs.2021.659953.

Laine, A. M., Lindholm, T., Nilsson, M., Kutznetsov, O., Jassey, V. E. J., & Tuittila, E.-S. (2021). Functional diversity and trait composition of vascular plant and Sphagnum moss communities during peatland succession across land uplift regions. Journal of Ecology, 1365-2745.13601. https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2745.13601

Robroek, B. J. M., Martí, M., Svensson, B. H., Dumont, M. G., Veraart, A. J., & Jassey, V. E. J. (2021). Rewiring of peatland plant–microbe networks outpaces species turnover. Oikos, 303, 605–15. http://doi.org/10.1111/oik.07635

Allen, J., Gross, E. M., …, Jassey VEJ,… Leflaive J. (2021). Disentangling the direct and indirect effects of agricultural runoff on freshwater ecosystems subject to global warming: A microcosm study. Water Research, 190, 116713. http://doi.org/10.1016/j.watres.2020.116713

Projects

Current Projects

full description of my current projects: https://vjasseyecology.wordpress.com/about/

MApping the contribution of Phototrophic microbes to the global carbon cycle of Peatlands (MAPP) | funded by CNRS-INSU EC2Co

Rethinking the peatland carbon cycle – identifying the role of mixotrophs in the biological carbon pump (MIXOPEAT) | Funded by the French Agency for Research (ANR-17-CE01-0007).

Effects of simulated nitrogen deposition on the epiphytic BRYOsphere in a TROPical rainforest (BRYOTROP) | Funded by Centre for the Study of Biodiversity in Amazonia (CEBA:ANR-10-LABX-25-01).

Allelochemical arms race in peatlands: the role of polyphenols in aboveground-belowground interactions (SPHAGNOL)

Influence of global warming and drought on carbon sequestration and biodiversity of Sphagnum peatlands present, past and future perspectives (CLIMPEAT)

Vincent Jassey

Rechercher