{"id":2005,"date":"2013-10-23T11:49:21","date_gmt":"2013-10-23T11:49:21","guid":{"rendered":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/?p=2005"},"modified":"2013-10-23T11:59:06","modified_gmt":"2013-10-23T11:59:06","slug":"wade-seminaire","status":"publish","type":"post","link":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/?p=2005","title":{"rendered":"WADE S\u00e9minaire"},"content":{"rendered":"

\"\"<\/a><\/strong><\/p>\n

Alexander Kirdyanov et Marina Bryukhanova<\/strong><\/p>\n

25 octobre de 10h \u00e0 12h<\/p>\n

Salle Tilleul – INRA centre de Nancy,\u00a0 Champenoux<\/p>\n

_____________________________________________<\/p>\n

Nous accueillons le 25 octobre Alexander Kirdyanov et Marina Bryukhanova du groupe de E. Vaganov (Sukachev Institute of Forests, Krasnoyarsk). E. Vaganov est un chercheur r\u00e9put\u00e9 sur la formation du bois et pour son livre de 2006.<\/p>\n

Le vendredi 25 octobre ils donneront un s\u00e9minaire soutenu par le projet WADe dans le Labex ARBRE (mais qui d\u00e9passe largement l’analyse de cernes).<\/p>\n

 <\/p>\n

R\u00e9sum\u00e9 Alexander Kirdyanov:<\/strong>
\nDendro-science in Siberia. Case studies from the Tree-Ring Structure Lab (Institute of Forest, Krasnoyarsk, Russia)<\/em><\/p>\n

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).<\/p>\n

R\u00e9sum\u00e9 Marina Bryukhanova:
\n<\/strong>Growth of trees on permafrost: habitat driven response to climate
\n<\/em>
\nGlobal 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.
\nA tree-ring multi-proxy characterisation of mature Larix gmelinii (Rupr.) Rupr. from a continuous permafrost zone of Siberia (Russia, 64\u00b018′ N, 100\u00b011′ 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.<\/p>\n

_____________________________________________<\/p>\n

Le projet WADE <\/strong>
\nAdaptation physiologique et fonctionnelle des structures et propri\u00e9t\u00e9s du bois \u00e0 l\u2019ouverture du couvert
\n<\/strong><\/p>\n

Contexte<\/strong><\/em> \u2014<\/strong> La variabilit\u00e9 de la qualit\u00e9 du bois est utilis\u00e9e en dendrochronologie pour marquer les \u00e9v\u00e9nements pass\u00e9s. Une meilleure compr\u00e9hension de cette plasticit\u00e9 du bois demande de nouvelles approches, car les r\u00e9ponses de l\u2019arbre superposent de nombreux processus. Les mod\u00e8les usuels fond\u00e9s sur l\u2019observation pass\u00e9e ne sont pas fiables dans le contexte de changements environnementaux rapides et intenses.<\/p>\n

Objectifs <\/strong><\/em>\u2014<\/strong> Le but de WADE est de r\u00e9nover le cadre de mod\u00e9lisation et d\u2019analyse de la plasticit\u00e9 des structures et propri\u00e9t\u00e9s du bois. WADE s\u2019appuie sur les questions pos\u00e9es par l\u2019acclimatation \u00e0 l\u2019ouverture du couvert, qui repr\u00e9sente une perturbation \u00e0 la fois fr\u00e9quente et complexe.<\/p>\n

Approches<\/em>\u2014<\/strong> WADE s\u2019appuie sur une approche multi-\u00e9chelle de la structure et des propri\u00e9t\u00e9s du bois, depuis l\u2019arbre entier jusqu\u2019\u00e0 la composition chimique et l\u2019ultra-structure pari\u00e9tale. WADE met en \u0153uvre un large \u00e9ventail de techniques de la dendro-\u00e9cologie, de la biophysique et de la chimie du bois. Le cadre conceptuel explicitera les crit\u00e8res de choix des traits du bois et la signification fonctionnelle des variations observ\u00e9es. WADE utilise les avanc\u00e9es r\u00e9centes de l\u2019\u00e9cophysiologie et de la biom\u00e9canique pour \u00e9tudier comment les arbres r\u00e9agissent aux changements du microclimat lumineux et m\u00e9canique apr\u00e8s ouverture.<\/p>\n

Responsable scientifique : Meriem Fournier (UMR 1092 Laboratoire d\u2019Etude des Ressources FOr\u00eat Bois)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Alexander Kirdyanov et Marina Bryukhanova 25 octobre de 10h \u00e0 12h Salle Tilleul – INRA centre de Nancy,\u00a0 Champenoux _____________________________________________ Nous accueillons le 25 octobre Alexander Kirdyanov et Marina Bryukhanova du groupe de E. Vaganov (Sukachev Institute of Forests, Krasnoyarsk). … Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,4,32,33],"tags":[],"class_list":["post-2005","post","type-post","status-publish","format-standard","hentry","category-divers","category-evenements","category-seminaires","category-visitors"],"_links":{"self":[{"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=\/wp\/v2\/posts\/2005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2005"}],"version-history":[{"count":0,"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=\/wp\/v2\/posts\/2005\/revisions"}],"wp:attachment":[{"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/ARBRE\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}