Loïc Francon

Loïc Francon
University of Geneva | UNIGE · Institute of Environmental Sciences

Ph.D.

About

9
Publications
2,304
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87
Citations
Citations since 2017
9 Research Items
87 Citations
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Introduction
I study the influence of climate change on subalpine and alpine shrub growth in European high mountains. My research combines dendroecology, remote sensing, and ecophysiology (dendrometry) of alpine plants in order to better understand the dynamics and functioning of alpine ecosystems, from cell formation to landscape evolution. I am also working on dendrometer measurements on peat bog trees in order to unravel the interactive factors that limit growth.

Publications

Publications (9)
Article
Full-text available
Introduction Mean xylem vessel or tracheid area have been demonstrated to represent powerful proxies to better understand the response of woody plants to changing climatic conditions. Yet, to date, this approach has rarely been applied to shrubs. Methods Here, we developed a multidecadal, annually-resolved chronology of vessel sizes for Rhododendr...
Article
Full-text available
Mountain ecosystems are particularly sensitive to climate change, which in part causes encroachment of woody plants at the treeline ecotone, with repercussions on treeline advance and ecosystem carbon balance. Yet, studies investigating the long-term trends in radial growth as well as year-to-year response of several tree and shrub species to clima...
Article
Full-text available
In the European Alps, air temperature has increased almost twice as much as the global average over the last century and, as a corollary, snow cover duration has decreased substantially. In the Arctic, dendroecological studies have evidenced that shrub growth is highly sensitive to temperature – this phenomenon has often been linked to shrub expans...
Thesis
Full-text available
Les écosystèmes alpins, comme la toundra arctique, subissent un réchauffement accentué par rapport au reste du globe. En Arctique, une approche dendroécologique basée sur l’analyse des relations entre la croissance annuelle radiale et le climat a permis de mettre en évidence les paramètres climatiques qui contrôlent l’expansion des arbustes nains (...
Article
Full-text available
Premise: Mountain ecosystems are particularly sensitive to climate change. However, only a very small number of studies exist so far using annually resolved records of alpine plant growth spanning the past century. Here we aimed to identify the effects of heat waves and drought, driven by global warming, on annual radial growth of Rhododendron fer...
Poster
Full-text available
In this study, electronic micro-dendrometers were used to monitor the variations in stem diameter of 11 Rhododendron ferrugineum (Rf) individuals located at 1800, 2100 and 2500m asl in the Taillefer Massif (French Alps) and at 1700m asl at Vicdessos (French Pyrenees). In addition, ground-level temperature was recorded for each individual. The resul...

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Projects

Projects (3)
Project
Reconstruction of Holocene hydro-climatic fluctuations based on multi-proxy peatland records
Archived project
To explore the dendroecological potential of a dominant shrub species in the subalpine and alpine levels of temperate mountains. To identify the (micro)climatic parameters limiting its radial growth, in contrasting geographical and topographical situations. To highlight the effects of climate change on radial growth. To propose alternatives to the methods traditionally used in dendrochronology in order to better take into account the specificities of shrubs.