François Guillemette

François Guillemette
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Ph.D. student, Carbon biogeochemistry/Microbial ecology

Current position: Postdoctoral research associate - Uppsala University

Contacts

Tel: (1)-514-987-3000, poste 2927

Paul del Giorgio Laboratory
Université du Québec à Montréal
Pavillon des sciences biologiques, SB-2805
2080 St-Urbain
Montréal, Québec, Canada
H2X 3X8

Biography

Ongoing Diploma

- Ph.D. Biology, UQÀM

Thesis Director: Paul del Giorgio

Completed Diploma(s)

- B.Sc. Biology (Problem-based learning), UQÀM

Committees:

2007-2010: Student Member, Executive Comity of the Society of Canadian Limnologists (SCL)

2007: Student Member, Organisation Comity of the 30^th International Society of Limnology (SIL) congress

Research Interests

My research interests revolve around different aspects of the bacterial metabolism in freshwater ecosystems including the bioavailability of dissolved organic carbon and its controlling factors, the modelisation of bacterial organic carbon consumption, its transformation into biomass that may ultimately fuel the aquatic food-web or into CO₂ following bacterial respiration, a powerfull greenhouse gas. Recently, I focused my research on the biogeneration of refractory organic matter as a potential pathway for long-term C storage by aquatic ecosystems.

For my ongoing research, I follow these different aspects of the bacterial metabolism both temporally, over different time scales (short- vs long-term), and spatially, over different interconnected aquatic ecosystems (watershed-scale approach).

Current Projects:

Bacterial metabolism - Guillemette (Dec 2011)
Reconstructing the multiple facets of bacterial DOC bioavailabilty in freshwater ecosystems

Keywords: carbon biogeochemistry, dissolved organic carbon, CO₂, bacterial metabolism, lake, river, stream, fluorescence, modelisation, watershed, C sources, DOC lability.

Publications

Articles:

Guillemette, F., S. L. McCallister and P. A. del Giorgio. The selective consumption and differential allocation of algal and terrestrial C define allochthony in lake bacterioplankton. (Submitted)
Lapierre, J.-F., F. Guillemette, M. Berggren and P. A. del Giorgio. Organic carbon processing in inland waters: Potential feedbacks between browning and climate. (In revision)
Guillemette, F., S. L. McCallister, and P. A. del Giorgio. 2013. Differentiating the degradation dynamics of algal and terrestrial carbon within complex natural dissolved organic carbon in temperate lakes. J. Geophys. Res. Biogeosci., 118, doi:10.1002/jgrg.20077.
Guillemette, F., and P. A. del Giorgio. 2012. Simultaneous consumption and production of fluorescent dissolved organic matter by lake bacterioplankton. Environmental. Microbiology. 14: 1432-1443.
Guillemette, F., and P. A. del Giorgio. 2011. Reconstructing the multiple facets of dissolved organic carbon bioavailability in freshwater ecosystems. Limnology and Oceanography. 56: 734-748.
Maurice, C.F., T. Bouvier, J. Comte, F. Guillemette and P. A. del Giorgio. 2010. Seasonal variations of phage life strategies and bacterial physiological states in three northern temperate lakes. Environmental Microbiology 12: 628–641. doi:10.1111/j.1462-2920.2009.02103.x
McCallister, S. L., F. Guillemette, and P. A. del Giorgio. 2006. A system to quantitatively recover bacterioplankton respiratory CO2 for isotopic analysis to trace sources and ages of organic matter consumed in freshwaters. Limnology and Oceanography: Methods. 4: 406-415.

Book Chapter:

Barnett A., Vogt, R. et Guillemette F. 2006. "De l'écologie à même votre cour!" In: Messier, C., L-A Giraldeau, B.E. Beisner (Eds). L'écologie en ville. Édition Multimonde, FIDES, Montréal, QC.

Barnett A., Vogt, R. et Guillemette F. 2012. "Praise for lazy gardeners" In: Messier, C., L-A Giraldeau, B.E. Beisner (Eds). Nature All Around Us. University of Chicago Press, USA.

Teaching

Lecturer:

BIO3500 Séminaire en écologie et analyse de données

Assitant:

BIA1601 Diversité Animale
BIA1700 Organismes et environnement
BIA3010 Méthodologie en écologie
BIA3510 Spécialisation I en écologie
BIO8092 Traitement des données biologiques

Photos:

Aerial view of the studied watershed located in the Eastern Townships region.

Photo: Energy, Mines, and Resources–Canadian
Government, A18649-80 [aerial photograph],
1:36 000, Ottawa, National Air Photo Library, 1964
Cartothèque–Université du Québec à Montréal.

Respiratory CO₂ recovery system allowing for the determination of sources fueling bacterial metabolism.

Short- and long-term bacterial carbon consumption incubation setups.