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Auteur Jean-Christophe Hervé (1961-2017)
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Ingénieur Général des Ponts, des Eaux et des Forêts, chef du Laboratoire d’Inventaire Forestier (LIF) de l’IGN fondé en 2013 à Nancy et conseiller scientifique du Service d’Inventaire Forestier et Environnemental (SIFE)
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Shifts in the height-related competitiveness of tree species following recent climate warming and implications for tree community composition: the case of common beech and sessile oak as predominant broadleaved species in Europe / Jean-Daniel Bontemps in Oikos, vol 121 n° 8 (August 2012)
[article]
Titre : Shifts in the height-related competitiveness of tree species following recent climate warming and implications for tree community composition: the case of common beech and sessile oak as predominant broadleaved species in Europe Type de document : Article/Communication Auteurs : Jean-Daniel Bontemps , Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Pierre Duplat, Auteur ; Jean-François Dhôte, Auteur Année de publication : 2012 Article en page(s) : pp 1287 - 1299 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] changement climatique
[Termes IGN] facteur édaphique
[Termes IGN] Fagus sylvatica
[Termes IGN] hauteur des arbres
[Termes IGN] placette d'échantillonnage
[Termes IGN] précipitation
[Termes IGN] Quercus sessiliflora
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) Height growth is a trait that contributes to tree species fitness. How height growth responds to environmental changes may therefore provide indications on species ability to compete and maintain, and on changes in tree community composition. Common beech Fagus sylvatica and sessile oak Quercus petraea are the predominant late-successional broadleaved species in Europe, and they differ in their shade-tolerance. On common beech (a shade tolerant species), recent observations across Europe have shown a growth decline during recent climate warming. Because sessile oak is a warmth- and light-demanding species, we therefore hypothesised that it may gain in competitiveness relative to common beech.
We conducted analyses of historical height growth in several regions spanning the distributional range of the two species across a temperate-continental gradient in France. Common beech and sessile oak were sampled in two and four regions, respectively, and were compared in two neighbouring regions. We documented the climatic and nutritional conditions of regional samples. Height growth of 408 trees of various ages was reconstituted from stem analyses. We estimated 20th-century regional chronologies of height growth using a statistical modelling approach that filtered out the effects of ontogeny and site fertility. In regions where both species were sampled, modelled height trajectories were compared at different periods over the 20th century.
Growth chronologies revealed 1) long-term growth rate increases of a magnitude of 50–100% over 100 years in both species, more acute in the continental domain, 2) recurrent historical inversions in growth fluctuations between species, 3) a recent divergence, with growth decline in common beech versus a dramatic growth increase in sessile oak, more acute in colder regions. The analysis of height trajectories indicated a recent reduction in common beech competitiveness relative to sessile oak. In the face of future climate warming, we conclude that increased prevalence of beech–oak mixtures may arise.Numéro de notice : A2012-716 Affiliation des auteurs : IFN+Ext (1958-2011) Thématique : FORET Nature : Article DOI : 10.1111/j.1600-0706.2011.20080.x Date de publication en ligne : 13/07/2012 En ligne : http://dx.doi.org/10.1111/j.1600-0706.2011.20080.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83721
in Oikos > vol 121 n° 8 (August 2012) . - pp 1287 - 1299[article]Diameter and death of whorl and interwhorl branches in Atlas cedar (Cedrus atlantica Manetti): a model accounting for acrotony / François Courbet in Annals of Forest Science, Vol 69 n° 2 (March 2012)
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Titre : Diameter and death of whorl and interwhorl branches in Atlas cedar (Cedrus atlantica Manetti): a model accounting for acrotony Type de document : Article/Communication Auteurs : François Courbet, Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Etienne K. Klein, Auteur ; Francis Colin, Auteur Année de publication : 2012 Article en page(s) : pp 125 - 138 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] branche (arbre)
[Termes IGN] Cedrus atlantica
[Termes IGN] diamètre des arbres
[Termes IGN] houppier
[Termes IGN] modèle non linéaire
[Termes IGN] modèle numérique
[Termes IGN] nutrition végétaleRésumé : (auteur) Branch size and branch status (dead or alive) are important characteristics closely related to tree growth and wood quality. The aim of this study was to design models for the diameter and status of branches in Atlas cedar (Cedrus atlantica Manetti). The models were developed from data collected on a set of 32 trees with a wide range of heights (from 3 to 36 m), girths (from 13 to 226 cm), and ages (from 20 to 95 years). A single general segmented model was designed for both whorl and interwhorl branch diameter, taking into account the tree and annual growth unit random effects. The model’s “potential x reducer” form describes the maximum branch diameter profile along the tree and the acrotonic gradient observed in annual shoots. The diameter and status of every branch were modeled based on the vertical position on the trunk and on the height of the base of the living crown. The tree diameter and the branch diameter were used as additional explanatory variables in the branch diameter model and the branch status model, respectively. The model structure is sufficiently general to be suited after re-parameterization for many coniferous species with interwhorl branches such as Spruces, Firs, and Larches. Numéro de notice : A2012-718 Affiliation des auteurs : IFN+Ext (1958-2011) Thématique : FORET Nature : Article DOI : 10.1007/s13595-011-0156-1 Date de publication en ligne : 06/12/2011 En ligne : http://dx.doi.org/10.1007/s13595-011-0156-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83725
in Annals of Forest Science > Vol 69 n° 2 (March 2012) . - pp 125 - 138[article]Nitrogen footprint in a long-term observation of forest growth over the twentieth century / Jean-Daniel Bontemps in Trees, vol 25 n° 2 (April 2011)
[article]
Titre : Nitrogen footprint in a long-term observation of forest growth over the twentieth century Type de document : Article/Communication Auteurs : Jean-Daniel Bontemps , Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Jean-Michel Leban , Auteur ; Jean-François Dhôte, Auteur Année de publication : 2011 Article en page(s) : pp 237 - 251 Note générale : bibliographie Langues : Anglais (eng) Résumé : (auteur) Environmental drivers of forest productivity increases have been much debated. Evidence for the suggested role of increasing nitrogen supply is lacking over long-term time scales. Tracking the footprint of environmental factors by using long-term growth records may thus prove decisive. We analysed growth chronologies of common beech in two areas of contrasting nutritional status in France. Dominant height growth was used as a proxy for productivity. Growth was compared between old and young paired stands sampled at the same sites to factor out effects of ageing and site. Growth chronologies were estimated with a statistical modelling procedure. The environmental causality of growth changes was addressed by combining (1) a comparison of growth changes between regions, (2) a regional comparison of growth chronologies with chronologies of environmental factors and (3) growth–environment relationships established from climate/soil data. Historical growth increases followed very similar courses in the two areas. Remarkably, the magnitude of change was 50% lower in the area that had reduced nutritional status and nitrogen deposition. Historical variations in environmental factors and growth were congruent with the roles of nitrogen availability and deposition, and of atmospheric CO2 increase. Low-frequency variations in climate and growth were not coincident. However, our analysis demonstrated the role of climatic anomalies in short-term growth variations. Growth–environment relationships further indicated a nitrogen constraint. These observations corroborate the enhancing role of increased nitrogen availability on forest biomass accumulation previously reported in ecosystem experiments and process-based modelling explorations. Numéro de notice : A2011-591 Affiliation des auteurs : IFN+Ext (1958-2011) Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00468-010-0501-2 Date de publication en ligne : 30/10/2010 En ligne : http://dx.doi.org/10.1007/s00468-010-0501-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90991
in Trees > vol 25 n° 2 (April 2011) . - pp 237 - 251[article]Long-term changes in forest productivity: a consistent assessment in even-aged stands / Jean-Daniel Bontemps in Forest science, vol 55 n° 6 (December 2009)
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Titre : Long-term changes in forest productivity: a consistent assessment in even-aged stands Type de document : Article/Communication Auteurs : Jean-Daniel Bontemps , Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Jean-François Dhôte, Auteur Année de publication : 2009 Article en page(s) : pp 549 - 564 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse diachronique
[Termes IGN] croissance des arbres
[Termes IGN] Fagus sylvatica
[Termes IGN] forêt
[Termes IGN] hauteur des arbres
[Termes IGN] productivitéRésumé : (auteur) The objective of the study was to provide a stand-scale assessment of long-term productivity changes in even-aged stands and to depict their chronology over the twentieth century. We focused on dominant height growth as a proxy for productivity, reconstructed from stem analyses in temporary plots. Height increments from two generations of stands were compared. Stands were associated in pairs to ensure accurate control of intrinsic site fertility conditions. The historical evolution of the growth rate was estimated using a statistical modeling approach based on a mixed-effects model, with a control of both site and developmental stage effects. We placed emphasis on a model formulation that leads to a meaningful interpretation of growth rate evolution. We applied the methodology to a sample of 14 stand pairs and 84 stem analyses of Common Beech in northeastern France. An accelerated increase in growth rate was identified, reaching +50% over the twentieth century. The trend also displayed short-term growth anomalies. Numéro de notice : A2009-394 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1093/forestscience/55.6.549 Date de publication en ligne : 01/12/2009 En ligne : https://doi.org/10.1093/forestscience/55.6.549 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83084
in Forest science > vol 55 n° 6 (December 2009) . - pp 549 - 564[article]Facteurs de risques de chablis dans les peuplements forestiers : les leçons tirées des tempêtes de 1999 / Francis Colin (2009)
Titre : Facteurs de risques de chablis dans les peuplements forestiers : les leçons tirées des tempêtes de 1999 Type de document : Chapitre/Contribution Auteurs : Francis Colin, Auteur ; Isabelle Vinkler, Auteur ; Philippe Riou-Nivert, Auteur ; Jean-Pierre Renaud , Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Jérôme Bock, Auteur ; Benjamin Piton , Auteur Editeur : Versailles : Quae Année de publication : 2009 Importance : pp 177 - 228 Langues : Français (fre) Descripteur : [Termes IGN] dommage forestier causé par facteurs naturels
[Termes IGN] inventaire forestier national (données France)
[Termes IGN] sol forestier
[Termes IGN] tempête
[Termes IGN] tempête Lothar de 1999
[Termes IGN] vent
[Vedettes matières IGN] Economie forestièreNuméro de notice : H2009-006 Affiliation des auteurs : IFN+Ext (1958-2011) Thématique : FORET Nature : Chapître / contribution DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96005 Diagnostic de la stabilité des peuplements à l'aide des données de l'IFN / Philippe Riou-Nivert in Forêt entreprise, n° 183 (novembre 2008)PermalinkIs the spatial distribution of European beech (Fagus sylvatica L.) limited by its potential height growth? / Ingrid Seynave in Journal of Biogeography, vol 35 n° 10 (October 2008)PermalinkLes forêts mélangées en France métropolitaine : Caractérisation à partir des résultats de l'Inventaire forestier national / François Morneau in Revue forestière française, vol 60 n° 2 (mars - avril 2008)PermalinkChangements de productivité à long terme dans les hêtraies du Nord de la France / Jean-François Dhôte in Rendez-vous techniques, Hors-série n° 3 (décembre 2007)PermalinkPermalinkPermalink