Portrait de Étienne Laliberté

Étienne Laliberté

Membre académique associé
Professeur titulaire, Université de Montréal, Département de sciences biologiques
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Biographie

Étienne Laliberté est professeur titulaire au Département de sciences biologiques de l'Université de Montréal, membre de l'Institut de recherche en biologie végétale (IRBV) et titulaire de la Chaire de recherche du Canada en biodiversité fonctionnelle végétale. Il dirige également l'Observatoire aérien canadien de la biodiversité (CABO).

Ses recherches actuelles se concentrent sur le développement de nouvelles approches pour la surveillance de la végétation (biodiversité végétale et carbone) basée sur la télédétection haute résolution à l'aide de drones et de la vision par ordinateur. Il s'intéresse particulièrement aux applications de cette technologie qui peuvent contribuer à atténuer la perte de biodiversité et le changement climatique, et qui peuvent avoir un effet rapide et généralisé.

Étudiants actuels

Baudchon Hugo Baudchon
Collaborateur·rice de recherche - Université de Montréal
Co-superviseur⋅e :
Chris Pal
hugo.baudchon@mila.quebec
Github

Publications

Foliar spectra accurately distinguish most temperate tree species and show strong phylogenetic signal
Florence Blanchard
Anne Bruneau
Étienne Laliberté
2024-04-20
American-Eurasian journal of botany (publié)
doi.org
Coordination among leaf and fine root traits across a strong natural soil fertility gradient
Xavier Guilbeault-Mayers
Hans Lambers
Étienne Laliberté
2023-11-05
bioRxiv (prépublication)
doi.org
Root phosphatase activity is coordinated with the root conservation gradient across a phosphorus gradient in a lowland tropical forest
Xavier Guilbeault-Mayers
Étienne Laliberté
Soil phosphorus (P) is a growth-limiting nutrient in tropical ecosystems, driving diverse P-acquisition strategies among plants. Particularl… (voir plus)y, mining for inorganic P through phosphomonoesterase (PME) activity is essential, given the substantial proportion of organic P in soils. Yet the relationship between PME activity and other P-acquisition root traits remains unclear. We measured root PME activity and commonly-measured root traits, including root diameter, specific root length (SRL), root tissue density (RTD), and nitrogen concentration ([N]) in 18 co-occurring trees across soils with varying P availability to better understand trees response to P supply. Root [N] and RTD were inversely related, and that axis was related to soil P supply. Indeed, both traits correlated positively and negatively to PME activity, which responded strongly to P supply. Conversely, root diameter was inversely related to SRL, but this axis was not related to P supply. Suggesting that limiting similarity influenced variation along the diameter-SRL axis, explaining high local trait diversity. Meanwhile, environmental filtering tended to impact trait values along the root [N]-RTD axis. Overall, P availability indicator traits like PME activity and root hairs only tended to be associated with these axes, highlighting limitations of these axes in describing convergent adaptations at local sites.
2023-10-31
bioRxiv (prépublication)
doi.org
Study Beekeeping potential data and development of a decision support system involving a web mapping platform
Philippe Doyon
Mickaël Germain
Guy Armel Fotso Kamga
Étienne Laliberté
Yacine Bouroubi
Madeleine Chagnon
The role of a decision support system is to gather, synthesize and present information in order to make informed decisions. In this project,… (voir plus) a mapping platform and a decision support system are proposed to present beekeeping data in Quebec. A complete review of the data and factors influencing honey production must first be carried out. The decision support system will be designed according to the nature of the data and access to available technologies. Continuous and real-time data management must be configured to make data interoperable. Multi-dimensional data loading tools will need to be configured to display data and analyses in a dashboard. Beekeepers will be able to optimize or move their hives according to their interpretation of the results displayed in the decision support system.
2023-07-16
IEEE International Geoscience and Remote Sensing Symposium (publié)
doi.org