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How do tree mortality models from combined tree-ring and inventory data affect projections of forest succession? / Marco Vanoni in Forest ecology and management, vol 433 (15 February 2019)  

Public [article]  inForest ecology and management > vol 433 (15 February 2019) . - pp 606 - 617 Titre : How do tree mortality models from combined tree-ring and inventory data affect projections of forest succession? Type de document : Article/Communication Auteurs : Marco Vanoni, Auteur ; Maxime Cailleret, Auteur ; Lisa Hülsmann, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 606 - 617 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] Abies alba [Termes IGN] arbre (flore) [Termes IGN] arbre mort [Termes IGN] croissance des arbres [Termes IGN] diamètre des arbres [Termes IGN] données dendrométriques [Termes IGN] dynamique de la végétation [Termes IGN] Europe centrale [Termes IGN] Fagus sylvatica [Termes IGN] forêt [Termes IGN] inventaire forestier étranger (données) [Termes IGN] Larix decidua [Termes IGN] modèle de croissance végétale [Termes IGN] modèle de simulation [Termes IGN] mortalité [Termes IGN] Picea abies [Termes IGN] Pinus cembra [Termes IGN] prévision [Termes IGN] Quercus (genre) [Termes IGN] Suisse Résumé : (auteur) Tree mortality is caused by complex interactions between multiple biotic and abiotic factors. Processes of tree mortality that are not induced by natural disturbances are often reflected in distinct radial growth patterns of trees, which typically serve as reliable indicators of impending tree mortality. However, it remains unclear whether empirical mortality models that are based on tree size and growth result in more realistic projections of forest succession in dynamic vegetation models (DVMs). We used a combination of tree-ring and inventory data from unmanaged Swiss natural forest reserves to derive species-specific survival models for six Central European tree species (Abies alba, Fagus sylvatica, Larix decidua, Picea abies, Pinus cembra and Quercus spp.). We jointly used 528 tree-ring samples and inventory data from eight forest reserves. We implemented the estimated parameters of the survival models into the DVM ForClim and performed simulations of forest succession that were validated using the inventory data of the forest reserves. Size- and growth-dependent variables (i.e., diameter at breast height and mean ring width) over the last few years prior to tree death were reliable predictors to distinguish between dying and living trees. Very low mean ring widths over several preceding years as well as small and large trees, respectively, reflected low survival probabilities. However, the small sample sizes of small and large trees resulted in considerable uncertainty of the survival probabilities. The implementation of these survival models in ForClim yielded plausible projections in short-term simulations and for some sites improved the predictions compared to the current ForClim version. Stand basal area, however, tended to be overestimated. Long-term simulations of ForClim based on the empirical survival models resulted in realistic predictions only if the uncertainty of the predicted survival probabilities was considered. We conclude that the combination of different data sources in combination with the consideration of intra-specific trait variability yields robust predictions of tree survival probabilities, thus paving the way towards better tree mortality models and more reliable projections of future forest dynamics. Numéro de notice : A2019-009 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1016/j.foreco.2018.11.042 Date de publication en ligne : 29/11/2018 En ligne : https://doi.org/10.1016/j.foreco.2018.11.042 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91603 [article]

Future management options for cembran pine forests close to the alpine timberline / Nathalia Jandl in Annals of Forest Science, vol 75 n° 3 (September 2018)  

Public [article]  inAnnals of Forest Science > vol 75 n° 3 (September 2018) Titre : Future management options for cembran pine forests close to the alpine timberline Type de document : Article/Communication Auteurs : Nathalia Jandl, Auteur ; Robert Jandl, Auteur ; Andreas Schindlbacher, Auteur Année de publication : 2018 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] biomasse forestière [Termes IGN] changement climatique [Termes IGN] économie forestière [Termes IGN] forêt alpestre [Termes IGN] gestion forestière [Termes IGN] grume [Termes IGN] Larix decidua [Termes IGN] marché du bois [Termes IGN] Pinus cembra [Termes IGN] prévention des risques [Termes IGN] puits de carbone [Termes IGN] service écosystémique [Termes IGN] simulation [Termes IGN] Tyrol (Autriche) [Vedettes matières IGN] Sylviculture Résumé : (auteur) Key message: High-elevation forests in the Alps protect infrastructure and human lives against natural hazards such as rockfall, flooding, and avalanches. Routinely performed silvicultural interventions maintain the required stand structure but are not commercially viable in remote forests due to high operational costs. Financial subsidies for the management of high-elevation protection forests are an efficient strategy to ensure sustainable forest cover. Context:Presently, many high-elevation forests in the Alps are managed in order to ensure the provision of ecosystem services with emphasis on the minimization of natural hazards. Aims: We studied the possible economic performance of a high-elevation protection forest from an owner’s perspective. We investigated whether the increase in productivity due to climate change and a favorable market for the dominating cembran pine (Pinus cembra L.) are sufficient for profitable timber production in protection forests. Methods: We simulated the standing timber stock and the soil carbon pool for a 100-year period with climate-sensitive models and compared harvesting costs with expected revenues. Our scenarios included different climates, intensities of timber extractions, parameters of the timber market, and the availability of government subsidies. Results: Overall, the productivity of forests increases by approximately 15% until the end of the century. In a zero-management scenario, the forest accumulates carbon both in the aboveground biomass and the soil. In the case of an extensive management with moderate timber extractions every 50 years, the carbon stocks decline both in biomass and soil. A more intensive management scenario with extractions every 30 years leads to substantial losses of the soil and biomass carbon pools. In addition, the stand structure changes and the protective function of the forest is not sustainably ensured. Timber production can be economically successful only with high selling prices of cembran pine timber and the availability of governmental subsidies for forest management. The admixed European larch (Larix decidua Mill.) contributes only marginally to the economic success. The main challenge are harvesting costs. The costs of timber extraction by a long-distance cableway logging system exceed the value of the harvested timber. Conclusion: The intensification of forest management cannot be recommended from the perspective of timber production, sustainable forest management, and protection against natural hazards. Our simulation experiment shows that the extraction of timber at decadal intervals depletes the carbon stock that is insufficiently replenished from aboveground and belowground litterfall. Leaving the forest unmanaged does not impose a particular threat to stand stability and is under the encountered situation, a justified strategy. Numéro de notice : A2018-332 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-018-0760-4 Date de publication en ligne : 15/08/2018 En ligne : https://doi.org/10.1007/s13595-018-0760-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90483 [article]

Les « Forêts alpines à Larix decidua et/ou Pinus cembra » (UE 9420) / Vincent Gaudillat (2011) 

Public Titre : Les « Forêts alpines à Larix decidua et/ou Pinus cembra » (UE 9420) : Éléments de définition et correspondances avec les autres typologies d’habitats : Directive « Habitats » - Note d’interprétation d’habitat Type de document : Rapport Auteurs : Vincent Gaudillat, Auteur ; Jean-Charles Villaret, Auteur Editeur : Paris : Muséum National d'Histoire Naturelle MNHN Année de publication : 2011 Autre Editeur : Gap [France] : Conservatoire Botanique National Alpin Collection : Rapport SPN Importance : 16 p. Format : 21 x 30 cm Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes IGN] Larix decidua [Termes IGN] Pinus cembra [Termes IGN] unité phytosociologique [Vedettes matières IGN] Ecologie forestière Résumé : (auteur) [introduction] Cette note a pour objet de préciser la définition de l’habitat UE 9420 et de clarifier le statut des cembraies, des cembraies-mélézins et des mélézins des Alpes françaises. Dans un deuxième temps, elle aborde la question des correspondances entre l’habitat UE 9420 et les autres typologies d’habitats. Numéro de notice : 17289 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/FORET Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82531

Documents numériques

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Effects of climate variables on intra-annual stem radial increment in Pinus cembra (L.) along the alpine treeline ecotone / Jolanda Zimmermann in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 503 Titre : Effects of climate variables on intra-annual stem radial increment in Pinus cembra (L.) along the alpine treeline ecotone Titre original : Effets du climat sur les variation intra-annuelles de croissance radiale de Pinus cembra (L.) le long d'un écotone à la limite altitudinale de forêt alpine Type de document : Article/Communication Auteurs : Jolanda Zimmermann, Auteur ; Gerhard Wieser, Auteur ; Walter Oberhuber, Auteur Année de publication : 2009 Article en page(s) : n° 503 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bilan hydrique [Termes IGN] dendrométrie [Termes IGN] diamètre des arbres [Termes IGN] écotone [Termes IGN] forêt subalpine [Termes IGN] phénologie [Termes IGN] Pinus cembra [Termes IGN] xylème [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Within the alpine treeline ecotone tree growth is increasingly restricted by extreme climate conditions. Although intra-annual stem growth recorded by dendrometers can be linked to climate, stem diameter increments in slow-growing subalpine trees are masked by changes in tree water status. We tested the hypothesis that intra-annual radial stem growth in Pinus cembra is influenced by different climate variables along the treeline ecotone in the Austrian Alps. Dendrometer traces were compared with dynamics of xylem cell development to date onset of cambial activity and radial stem growth in spring. Daily fluctuations in stem radius reflected changes in tree water status throughout the treeline ecotone. Extracted daily radial increments were significantly correlated with air temperature at the timberline and treeline only, where budburst, cambial activity and enlargement of first tracheids also occurred quite similarly. A close relationship was detected between radial increment and number of enlarging tracheids throughout the treeline ecotone. We conclude that (i) the relationship between climate and radial stem growth within the treeline ecotone is dependent on a close coupling to atmospheric climate conditions and (ii) initiation of cambial activity and radial growth in spring can be distinguished from stem re-hydration by histological analysis. Numéro de notice : A2009-637 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009038 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f09037/f09037.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72461 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Analiza auxologica la zâmbru (Pinus cembra L.) : studiu de caz / Cristian Popa in Revista Padurilor, vol 122 n° 6 (6/2007)

Public [article]  inRevista Padurilor > vol 122 n° 6 (6/2007) . - pp 38-43 Titre : Analiza auxologica la zâmbru (Pinus cembra L.) : studiu de caz Titre original : Analyse auxologique du pin arolle (Pinus cembra L.) : étude de cas = Stem analysis of a stone pine (Pinus cembra L.) : a case study Type de document : Article/Communication Auteurs : Cristian Popa, Auteur Année de publication : 2007 Article en page(s) : pp 38-43 Note générale : Bibliographie Langues : Roumain (rum) Descripteur : [Termes IGN] dendrochronologie [Termes IGN] Pinus cembra [Termes IGN] Roumanie Mots-clés libres : Monts Rodna Numéro de notice : IFN_615 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=69561 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-DIR-P000008	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Le mélèze dans la Vallée de l'Ubaye (Basses-Alpes) : ses groupements naturels, le phénomène " per descensum " / André Lavagne in Annales des Sciences forestières, vol 21 n° 4 ([01/11/1964])  

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