Carbon and nutrient biogeochemistry and productivity in aquatic systems

I combine tools and principles from environmental chemistry, hydrology and limnology to understand carbon and nutrient fluxes and transformations across aquatic ecosystems. I apply the land-to-ocean aquatic continuum framework in this work to understand the impact that watershed processes have on downstream water quality. I am also actively involved in collaborations related to microbial diversity and productivity across landscapes. ​

Recent publications: 

• Organic carbon dynamics across the land-ocean interface on the B.C. Central Coast: St. Pierre and Oliver et al. 2020 Limnol. Oceanogr. link
• ​Chemical weathering drives CO2 consumption in glacial meltwaters: St. Pierre et al. 2019, PNAS, 116, 17690-17695. 
• CH4 consumption driven by soil properties in Greenlandic heath landscapes: St. Pierre et al. 2019, Soil Biol. Biochem. 138, 107605.
• Comprehensive limnology (physical, chemical, biological) of a High Arctic lake: St. Pierre et al. 2019. Sci. Reports  9, 4447. 
• Aquatic microbial communities across a High Arctic watershed: Cavaco et al. 2019. FEMS Microbiol. Ecol. 95, fiz161.
• Sedimentary microbial community composition (Ruuskanen et al. 2018. Front. Microbiol. 9, 1138.) and function (Ruuskanen et al. 2020. Limnol. Oceanogr. 65, S233-S247.) linked to biogeochemical gradients. 

Selected research talks: 

• Society of Canadian Limnologists Limnoseminar on Greenhouse Gas Dynamics in the Arctic (Jan. 2021)

Seasonal shifts in lake phytoplankton community composition in relation to water column nutrient stoichiometry. (From St. Pierre et al. 2019, Sci. Reports.)

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