WADE Seminar

Alexander Kirdyanov et Marina Bryukhanova

25 October  from 10h00-12h00

Salle Tilleul – INRA Nancy center,  Champenoux


On October 25th, we are pleased to announce that we will welcome to INRA Alexander Kirdyanov and Marina Bryukhanova from the E. Vaganov group (Sukachev Institute of Forests, Krasnoyarsk).  E. Vagonov is a respected and well known researcher in the field of wood formation. He is also known for his book published in 2006.

This seminar is supported by the WADE project and by Labex ARBRE.

Résumé Alexander Kirdyanov:

Dendro-science in Siberia. Case studies from the Tree-Ring Structure Lab (Institute of Forest, Krasnoyarsk, Russia)

Tree-rings were shown to provide comprehensive information on the environmental changes and physiology of tree functioning. The Laboratory of Tree-Ring Structure at the Sukachev Institute of Forest, Krasnoyarsk Russia is focused on extracting and interpreting this information with the goals to understand the impact of environment on tree growth and forest productivity. A short overview of some recent and current studies will be provided to show the main topics of interest and the potential of the Lab: transect studies, use of multi-proxy approach (tree-ring cell structure, density and isotope composition), studies on permafrost, etc. Examples will vary on both spatial (from one stand to continental) and temporal scale (seasonal growth with the resolution of 3-7 days to multi-millennia dendroclimatic reconstructions).

Résumé Marina Bryukhanova:
Growth of trees on permafrost: habitat driven response to climate

Global change is expected to alter boreal forest conditions with far reaching consequences for tree growth in these ecosystems. Within this study we aimed at determining which limiting factors control tree-growth on permafrost under different site conditions.
A tree-ring multi-proxy characterisation of mature Larix gmelinii (Rupr.) Rupr. from a continuous permafrost zone of Siberia (Russia, 64°18′ N, 100°11′ E) was used to identify the physiological principle of responses related to the plant-soil system. Tree-ring width (1975-2009), carbon and oxygen stable isotopes, and xylem structural characteristics (2000-2009) indicated that an increased depth of the soil active layer favors a better exploitation of the available resources.


The WADE project
Wood Acclimation to Disturbed Environments

ContextWood quality is variable and used by dendrochronology as a marker of past events. A better understanding of wood plasticity require new modeling approaches, as tree responses in frequently and strongly changing environments overlay many processes. Therefore, neither the usual modeling of wood properties from variables as tree ring width and cambial age, nor the empirical calibration of a few wood properties as markers of tree functioning and environmental disturbances, deliver robust and reliable predictions.

Objectives Wade aims at developing a new framework of wood analysis and quality modeling in the context of questions asked by acclimation to canopy disturbance.

Approaches — WADE is based on a multi-scale approach of wood structure and properties from the whole tree to the cell wall ultrastructure and chemical composition, with a large set of techniques including usual and new methods of both dendro-ecology and wood biophysics and chemistry. It includes a careful theoretical analysis of the functional relevance of the selected properties and of their spatio-temporal patterns of variations, using an ecophysiological and biomechanical framework to study how trees respond to changes of both light and mechanical micro-climate after gap opening.

PI: Meriem Fournier (UMR 1092 LERFOB Laboratoire d’Etudes des Ressources Forêts-Bois )

Labex Seminars in Forest Biomechanics and Modeling

Wednesday 10, 13h30 to 15h30 (INRA Champenoux), Room “Tilleul”

13h30: Rosario Sierra de Grado

Straight  and twisted-stemmed populations in Pinus pinaster: different biomechanical capabilities? Stems, roots and biomass partitioning in tilted plants

14h30: Felipe Bravo

“Modelling Growth and Yield of Pinus sylvestris and Pinus pinaster in Central Spain: individual non-spatial approach, intengration on decision support systems and future integration of climate variable”

Universidad de Valladolid, Palencia campus, Sustainable Forest Management Research Institute, University of Valladolid & INIA Madrid

Rosario is a forest geneticist, specialist of maritime pine breeding. She introduced biomechanical concepts and experiments in tree breeding research (Sierra de Grado et al. Trees 1997, Tree physiology 2008). She was the dean of the forest engineering program (bachelor and master level) of University of Valladolid on Palencia campus. They work in the . Both Her visit is motivated by opportunities of collaboration between our national projects (LABEX WADE task 2, ANR Tropic) and a national Spanish project.

Felipe Bravo is a forest scientist (interests in growth modeling, inventory, adaptive silviculture and forest management, see for example Bravo, F. et al. 2011 Growth and yield models in Spain: Historical overview, Contemporary Examples and perspectives. Forest Systems 20(2):315-328). He is responsible of the new master Erasmus Mundus Program MEDFOR « Mediterranean Forestry ». As Rosario, he was the dean of the forest engineering program (bachelor and master level) of University of Valladolid on Palencia campus. His visit is motivated by his participation in the thesis committee of Vivien Bonnesoeur. He is more generally involved in forest growth modeling, with Mathieu Fortin and Ruben Manso, in the framework of the ANR FOR-WIND. Felipe is also the supervisor with Heinrich Spiecker of the phD of Jorge Olivar, welcomed in LERFoB in 2012 in the Xylosciences platform.

Mining the Matsutake Genome

Professor Jianping (JP) Xu from the Department of Biology of McMaster University (Hamilton, Ontario, Canada) is hosted by the Ecogenomics team (IaM department) for a 3-month sabbatical stay. He will investigate the genome polymorphism of the famous, iconic Tricholoma matsutakeJP is funded by the LabeX ARBRE.