Descripteur
Termes IGN > sciences naturelles > sciences de la vie > biologie > biométrie > modélisation de la forêt
modélisation de la forêt |
Documents disponibles dans cette catégorie (129)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Model-based analysis–synthesis for realistic tree reconstruction and growth simulation / Corina Iovan in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
[article]
Titre : Model-based analysis–synthesis for realistic tree reconstruction and growth simulation Type de document : Article/Communication Auteurs : Corina Iovan , Auteur ; Paul-Henri Cournède, Auteur ; Thomas Guyard, Auteur ; Benoit Bayol, Auteur ; Didier Boldo , Auteur ; Matthieu Cord, Auteur Année de publication : 2014 Article en page(s) : pp 1438 - 1450 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse d'image orientée objet
[Termes IGN] arbre (flore)
[Termes IGN] arbre urbain
[Termes IGN] croissance des arbres
[Termes IGN] détection d'arbres
[Termes IGN] dynamique de la végétation
[Termes IGN] extraction de la végétation
[Termes IGN] image aérienne
[Termes IGN] modèle de croissance végétale
[Termes IGN] reconstruction d'objetRésumé : (auteur) Due to complexity, vegetation analysis and reconstruction of remote sensing data are challenging problems. Using architectural tree models combined with model inputs estimated from aerial image analysis, this paper presents an analysis-synthesis approach for urban vegetation detection, modeling, and reconstruction. Tree species, height, and crown size information are extracted by aerial image analysis. These variables serve for model inversion to retrieve plant age, climatic growth conditions, and competition with neighbors. Functional-structural individual-based tree models are used to reconstruct and visualize virtual trees and their time evolutions realistically in a 3-D viewer rendering the models with geographical coordinates in the reconstructed scene. Our main contributions are: 1) a novel approach for generating plant models in 3-D reconstructed scenes based on the analysis of the geometric properties of the data, and 2) a modeling workflow for the reconstruction and growth simulation of vegetation in urban or natural environments. Numéro de notice : A2014-815 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2251467 Date de publication en ligne : 12/04/2013 En ligne : https://doi.org/10.1109/TGRS.2013.2251467 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92035
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 2 (February 2014) . - pp 1438 - 1450[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014021 RAB Revue Centre de documentation En réserve L003 Disponible Les coefficients d’expansion pour déduire différents volumes de branches à partir de volumes de tige / Fleur Longuetaud in Rendez-vous techniques, n° 39-40 (Hiver-printemps 2013)
[article]
Titre : Les coefficients d’expansion pour déduire différents volumes de branches à partir de volumes de tige Type de document : Article/Communication Auteurs : Fleur Longuetaud, Auteur ; Frédéric Mothe, Auteur ; Philippe Desplanches, Auteur ; Antoine Colin , Auteur ; Christine Deleuze, Auteur Année de publication : 2013 Projets : EMERGE / Deleuze, Christine Article en page(s) : pp 48 - 59 Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes IGN] branche (arbre)
[Termes IGN] houppier
[Termes IGN] modèle de croissance végétale
[Termes IGN] tronc
[Termes IGN] volume en bois
[Vedettes matières IGN] DendrométrieRésumé : (auteur) [introduction] La mesure du volume des houppiers des arbres est extrêmement laborieuse alors que la valeur commerciale du bois est faible. Cependant il est de plus en plus nécessaire d’estimer correctement ces houppiers en volume et en biomasse dès lors qu’on envisage de les valoriser à des fins énergétiques. De même, lorsqu’il s’agit d’évaluer les quantités de carbone stockées en forêt : les inventaires forestiers nationaux sont bien armés pour estimer des volumes de tiges, mais les volumes des houppiers sont estimés souvent indirectement. Dans les deux cas, une méthode possible est d’attribuer au houppier une proportion du volume de tige ou de grume estimé par ailleurs, c’est-à-dire que l’on suppose que l’accroissement total de volume de l’arbre est relié à l’accroissement de sa tige et que l’on peut expliciter cette relation. Cet article se propose d’éclairer cette relation entre volume de tige et volume de houppier, plus complexe qu’il y paraît et qui peut donner lieu à de multiples définitions. En explorant deux définitions assez usuelles, l’une en recherche, l’autre en gestion, il se propose aussi de donner des ordres de grandeurs par essence et contexte et surtout d’analyser les sources principales de variation. Numéro de notice : A2013-831 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : FORET Nature : Article nature-HAL : ArtSansCL DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95571
in Rendez-vous techniques > n° 39-40 (Hiver-printemps 2013) . - pp 48 - 59[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-001-P001488 PER Revue Nogent-sur-Vernisson Salle périodiques Disponible Documents numériques
en open access
Les coefficients d’expansion ... - pdf éditeurAdobe Acrobat PDF A non-asymptotic sigmoid growth curve for top height growth in forest stands / Jean-Daniel Bontemps in Forestry, an international journal of forest research, vol 85 n° 3 (July 2012)
[article]
Titre : A non-asymptotic sigmoid growth curve for top height growth in forest stands Type de document : Article/Communication Auteurs : Jean-Daniel Bontemps , Auteur ; Pierre Duplat, Auteur Année de publication : 2012 Article en page(s) : pp 353 - 368 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Statistiques
[Termes IGN] courbe
[Termes IGN] croissance des arbres
[Termes IGN] hauteur des arbres
[Termes IGN] modèle de croissance végétale
[Termes IGN] modélisation de la forêt
[Termes IGN] peuplement forestierRésumé : (Auteur) Since the height horizon remains undetected in the vast majority of height series sampled in forest stands, even of notable ages, the realism of the traditional asymptotic-size modelling assumption is questioned. The aims of the study were to present an original non-asymptotic growth model and to test its accuracy against asymptotic-size equations. The equation proposed is a first-order four-parameter autonomous differential equation. The related sigmoid size curve has a parabolic branch of time. It was tested on 349 old growth series of top height (1047 stem analyses) selected to explore the maximum observed ranges of age and site conditions in seven temperate tree species growing in pure and even-aged stands. The fitting accuracy of this equation and three classical asymptotic-size growth equations (Richards, Hossfeld IV and Korf equations) were compared, with parameterizations of increasing flexibility. For the different parameterizations, the proposed growth equation showed higher performances than asymptotic growth equations, attributed to its non-asymptotic property and to the mathematical independence between parameters related to the inflection point and late growth. Top height growth was therefore accurately modelled by a sigmoid curve not based on the asymptotic-size assumption. This equation may be of general relevance to tree growth modelling. Numéro de notice : A2012-732 Affiliation des auteurs : non IGN Thématique : FORET/MATHEMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1093/forestry/cps034 Date de publication en ligne : 11/04/2012 En ligne : https://doi.org/10.1093/forestry/cps034 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91172
in Forestry, an international journal of forest research > vol 85 n° 3 (July 2012) . - pp 353 - 368[article]Tracking human impact on current tree species distribution using plant communities / Daniel E. Silva in Journal of vegetation science, vol 23 n° 2 (April 2012)
[article]
Titre : Tracking human impact on current tree species distribution using plant communities Type de document : Article/Communication Auteurs : Daniel E. Silva, Auteur ; Vincent Badeau, Auteur ; Myriam Legay, Auteur ; Emmanuel Corcket, Auteur ; Jean-Luc Dupouey, Auteur Année de publication : 2012 Article en page(s) : pp 313 - 324 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] aire de répartition
[Termes IGN] anthropisation
[Termes IGN] Fagus sylvatica
[Termes IGN] inventaire forestier national (données France)
[Termes IGN] marge
[Termes IGN] modélisation de la forêt
[Termes IGN] phytosociologie
[Termes IGN] plaine
[Termes IGN] régression logistique
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) Questions : Can we adequately model beech distribution based on accompanying vegetation, and how does this compare with a climate model? To what extent does accompanying vegetation predict larger extension of beech at its SW margin compared with current distribution? Do human factors explain the discrepancy between current and potential distribution?
Location : Lowland forests at the SW European range margin of beech.
Methods : We built a logistic regression model of beech presence based on accompanying understorey vegetation using 66 976 plots in the French National Forest Inventory (NFI) network. Explanatory variables were obtained by multivariate reduction of 252 species in NFI plots. The model was calibrated in regions where human impact on beech has been comparatively low. The probability of beech presence was estimated at its SW margin and compared with current distribution. We tested whether forest management factors could explain beech absence in locations where the flora predicted its presence. Performance of this model was compared with a classical climatic-envelope model.
Results : Modelled potential distribution of beech along its SW margin was larger than observed distribution, suggesting area shrinkage under man's influence. Sites where beech was predicted as present but was currently absent were significantly less common in high forest stands, and more common in coppices, plantations and private forests. Characteristics of species replacing beech (early-successional, plantation or exotic species) confirmed the role of forest management and disturbance in beech disappearance. The floristic model provided a finer resolution distribution map than the climatic-envelope model.
Conclusions : Plant communities, together with precise tree species maps, allowed us to estimate manipulation of beech by man, and main silvicultural causes of its disappearance. The improvement in quality of current distribution models has important implications for modelling of niches under future climate scenarios.Numéro de notice : A2012-726 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1111/j.1654-1103.2011.01341.x En ligne : http://doi.org/10.1111/j.1654-1103.2011.01341.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=87074
in Journal of vegetation science > vol 23 n° 2 (April 2012) . - pp 313 - 324[article]Modelling forest management within a global vegetation model - Part 2: Model validation from a tree to a continental scale / V. Bellassen in Ecological modelling, vol 222 n° 1 (janvier 10, 2011)
[article]
Titre : Modelling forest management within a global vegetation model - Part 2: Model validation from a tree to a continental scale Type de document : Article/Communication Auteurs : V. Bellassen, Auteur ; G. Le Maire, Auteur ; O. Guin, Auteur ; Jean-François Dhôte, Auteur ; Philippe Ciais, Auteur ; Nicolas Viovy, Auteur Année de publication : 2011 Article en page(s) : pp 57 - 75 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] biomasse forestière
[Termes IGN] carbone
[Termes IGN] modélisation de la forêt
[Termes IGN] stress hydriqueMots-clés libres : ORCHIDEE-FM Résumé : (auteur) The construction of a new forest management module (FMM) within the ORCHIDEE global vegetation model (GVM) allows a realistic simulation of biomass changes during the life cycle of a forest, which makes many biomass datasets suitable as validation data for the coupled ORCHIDEE-FM GVM. This study uses three datasets to validate ORCHIDEE-FM at different temporal and spatial scales: permanent monitoring plots, yield tables, and the French national inventory data. The last dataset has sufficient geospatial coverage to allow a novel type of validation: inventory plots can be used to produce continuous maps that can be compared to continuous simulations for regional trends in standing volumes and volume increments. ORCHIDEE-FM performs better than simple statistical models for stand-level variables, which include tree density, basal area, standing volume, average circumference and height, when management intensity and initial conditions are known: model efficiency is improved by an average of 0.11, and its average bias does not exceed 25%. The performance of the model is less satisfying for tree-level variables, including extreme circumferences, tree circumference distribution and competition indices, or when management and initial conditions are unknown. At the regional level, when climate forcing is accurate for precipitation, ORCHIDEE-FM is able to reproduce most productivity patterns in France, such as the local lows of needleleaves in the Parisian basin and of broadleaves in south-central France. The simulation of water stress effects on biomass in the Mediterranean region, however, remains problematic, as does the simulation of the wood increment for coniferous trees. These pitfalls pertain to the general ORCHIDEE model rather than to the FMM. Overall, with an average bias seldom exceeding 40%, the performance of ORCHIDEE-FM is deemed reliable to use it as a new modelling tool in the study of the effects of interactions between forest management and climate on biomass stocks of forests across a range of scales from plot to country. Numéro de notice : A2011-285 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1016/j.ecolmodel.2010.08.038 Date de publication en ligne : 22/10/2010 En ligne : https://doi.org/10.1016/j.ecolmodel.2010.08.038 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102459
in Ecological modelling > vol 222 n° 1 (janvier 10, 2011) . - pp 57 - 75[article]Modelling forest management within a global vegetation model - Part 1: Model structure and general behaviour / V. Bellassen in Ecological modelling, vol 221 n° 20 (octobre 2010)PermalinkRecent changes in forest productivity: An analysis of national forest inventory data for common beech (Fagus sylvatica L.) in north-eastern France / Marie Charru in Forest ecology and management, vol 260 n° 5 (30 July 2010)PermalinkComment estimer la lumière dans le sous-bois forestier à partir des caractéristiques dendrométriques des peuplements ? / Philippe Balandier ; André Marquier ; Sandrine Perret ; Catherine Collet ; Benoît Courbaud in Rendez-vous techniques, n° 27-28 (hiver - printemps 2010)PermalinkModélisation de la croissance des peuplements mélangés chêne-pin : des enseignements importants pour la sylviculture de ces peuplements / Christine Micheneau ; Christine Deleuze-Brezins ; Jean-François Dhôte ; Myriam Legay in Rendez-vous techniques, n° 27-28 (hiver - printemps 2010)PermalinkA generic model of thinning and stand density effects on forest growth, mortality and net increment / Oskar Franklin in Annals of Forest Science, Vol 66 n° 8 (December 2009)PermalinkTree diameter, height and stocking in even-aged forests / Jerome K. Vanclay in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)PermalinkUsing cover measurements to estimate aboveground understorey biomass in Maritime pine stands / Annabel J. Porté in Annals of Forest Science, Vol 66 n° 3 (April - May 2009)PermalinkBiomass component equations for Latin American species and groups of species / José Návar in Annals of Forest Science, Vol 66 n° 2 (march 2009)PermalinkA new bioclimatic model calibrated with vegetation for Mediterranean forest areas / Michel Vennetier in Annals of Forest Science, Vol 65 n° 7 (October - November 2008)PermalinkQuels modèles de croissance pour les peuplements mélangés ? Exemple du mélange Chêne sessile - Pin sylvestre / Thomas Pérot in Revue forestière française, vol 60 n° 2 (mars - avril 2008)Permalink