Content uploaded by Alexandre Lhosmot
Author content
All content in this area was uploaded by Alexandre Lhosmot on Nov 08, 2023
Content may be subject to copyright.
Content uploaded by Alexandre Lhosmot
Author content
All content in this area was uploaded by Alexandre Lhosmot on Nov 08, 2023
Content may be subject to copyright.
From microbiological to ecosystemic scale evaluation
of carbon-based (CO2, CH4) greenhouse gas sources,
production, and transfers in temperate peatlands: a
pluridisciplinary week at the playground for Critical
Zonists in Frasne, Jura Mountains
Alexandre Lhosmot∗1, Adrien Jacotot2, Camille Bouchez3, Eliot Chatton3, Sarah
Coffinet4, Philippe Binet1, Robin Calisti5, Edward A. D. Mitchell5, Daniel Gilbert1,
Marie-Laure Toussaint1, Marc Steinmann6, Travis Meador7, Christophe Loup6, Delphine
Combaz8, Lilian Joly8, Florian Parent8, Nicolas Dumelie8, Gr´egory Albora8, Jean-Louis
Bonne8, Charbel Abdallah8, Thomas Lauvaux8, J´er´emie Burgalat8, Ngoc-Minh Hoang8,
Laurent Longuevergne3, Olivier Mathieu9, Philippe Amiotte-Suchet9, V´eronique
Lavastre10 , Marie-No¨elle Pons11 , Arnaud Elger12, Romain Walcker12 , Valentin Essert6,
Laurent Millet6, H´el`ene Masclaux6, Val´erie Verneaux6, Anne Boetsch13, Joshua
Ducasse6, Christina Hazard14, Huaiyu Wang14, Vincent Jassey12, Laure Gandois12, Jean
S´ebastien Moquet15 , Sebastien Gogo4, Guillaume Bertrand1,16, and Vincent Milesi17
1Laboratoire Chrono-environnement, 25200 Montb´eliard – CNRS : UMR6249, Universit´e de Franche
Comt´e – France
2Sol, Agro et hydrosyst`emes, Spatialisation (SAS), Institut Agro, 35700 Rennes – CNRS : UMR1069,
INRAE – France
3G´eosciences Rennes, 35700 Rennes – CNRS : UMR6118, Universit´e de Rennes I – France
4Ecosyst`emes, Biodiversit´e, Evolution (Ecobio), 35700 Rennes – UMR 6553 CNRS, Universit´e de
Rennes I – France
5Laboratoire de Biodiversit´e du Sol, Universit´e de Neuchˆatel, 2000 Neuchˆatel – Suisse
6Laboratoire Chrono-environnement, 25000 Besan¸con – CNRS : UMR6249, Universit´e de Franche
Comt´e – France
7Biology Center Czech Academy of Sciences, Soil Water Research Infrastructure, Ceske Budejovice,
CZ-37005 – R´epublique tch`eque
8GSMA, 51687 Reims – CNRS : UMR7331, Universit´e de Reims - Champagne Ardenne – France
9Biog´eosciences, Universit´e de Bourgogne, 21000 Dijon – CNRS : UMR6282 – France
10LGL-TP, 42023 Saint-Etienne – Universit´e Jean Monnet - Saint-Etienne, CNRS : UMR5276 – France
11LRGP, 54000 Nancy – Universit´e de Lorraine, Centre National de la Recherche Scientifique – France
12Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), 31326 Castanet – CNRS : UMR5245,
Universit´e de Toulouse Paul Sabatier – France
13OSU-THETA, 25000 Besan¸con – Universit´e de Franche-Comt´e, CNRS : UMR6249 – France
14 ´
Ecole Centrale de Lyon, Universit´e de Lyon, 69134 Ecully – CNRS : UMR5005 – France
15Institut des Sciences de la Terre d’Orl´eans (ISTO), 45100 Orl´eans – Observatoire des Sciences de
l’Univers en r´egion Centre, Universit´e d’Orl´eans, CNRS : UMR7327 – France
16Water Resources and Environmental Engineering Laboratory, Federal University of Para´ıba,
58051-900 Joao Pessoa – Br´esil
17Institut des Sciences de la Terre d’Orl´eans - UMR7327 – Bureau de Recherches G´eologiques et
Mini`eres (BRGM), Observatoire des Sciences de l’Univers en r´egion Centre, Institut National des
Sciences de l’Univers, Universit´e d’Orl´eans, Centre National de la Recherche Scientifique – France
R´esum´e
Despite covering only 3% of the global land surface, peatlands are an active part of the
Critical Zone (CZ) exchanging large water and greenhouse gas (GHG) fluxes with the sur-
rounding aquifers, surface waters, and the atmosphere. While ecosystem services of peatlands
(carbon and water storage, buffering of local climate) are essential to address 21st century
challenges regarding climate, biodiversity, and water resources, they are directly threatened
by human activities at global (climate change) and local (drainage for agriculture, forestry
and peat harvesting) scales. Understanding the hydrological, biogeochemical, and ecological
mechanisms of peatlands functioning at different spatiotemporal scales is therefore funda-
mental to mitigate these impacts.
In order to characterize the mechanisms and factors controlling GHG sources, production
and transfers in peatlands, we organized an interdisciplinary field campaign at the Frasne
peatland. The site (7 ha, 46.826 N, 6.1754E, 840 m a.s.l) is a long-term observatory since
2008 and one of the four French peatland observatories (SNO Tourbi`eres) of the French CZ
research infrastructure (OZCAR). The peatland is also an observatory of the Zone Atelier
of Arc Jurassien dedicated to exploring the interrelationships between human and nature.
This campaign is supported by the TERRA FORMA project, aiming at designing and test-
ing in-situ smart, connected, low-cost, low-impact and socially appropriated environmental
sensors to capture the trajectory of the CZ in the Anthropocene.
This field campaign will combine microbiological characterization (membrane lipid analysis
to trace the involved microbial metabolisms) with hydrogeochemical analyses of peat pore wa-
ter (major elements, DOC (quantity and quality), CO2, CH4, δ18OH2O-δ2HH2O, δ13CDIC,
δ13CDOC, δ13CCH4, δ2HCH4, δ13CCO2) along upstream-downstream and surface-depth
gradients. In parallel, GHG fluxes will be measured from the plot to the ecosystem scale,
by combining dissolved gas profiles, chamber measurements, eddy-covariance and unmanned
aerial vehicle characterization.
This multiscale campaign will have the potential to address various challenges faced by Criti-
cal Zonists and environmental managers: (1) assessing 3D carbon fluxes (lateral and vertical)
at the peatland scale; (2) characterizing biological processes and in particular how they favor
or limit GHG production; (3) and transfers and developing affordable and user-friendly tools
to face the above-mentioned topics.
Mots-Cl´es: Drone, Eddycovariance, Methanogenesis, Methanotrophy, GHG, SocioEcosystems, Crit-
ical Zone, Peatland
∗Intervenant
sciencesconf.org:rst2023-rennes:484554