Descripteur
Termes descripteurs IGN > sciences naturelles > sciences de la vie > botanique > botanique systématique > gymnosperme > pinophyta > pinaceae > Abies (genre) > Abies balsamea
Abies balsameaSynonyme(s)sapin baumier |



Etendre la recherche sur niveau(x) vers le bas
The utility of terrestrial photogrammetry for assessment of tree volume and taper in boreal mixedwood forests / Christopher Mulverhill in Annals of Forest Science [en ligne], Vol 76 n° 3 (September 2019)
![]()
[article]
Titre : The utility of terrestrial photogrammetry for assessment of tree volume and taper in boreal mixedwood forests Type de document : Article/Communication Auteurs : Christopher Mulverhill, Auteur ; Nicholas C. Coops, Auteur ; Piotr Tompalski, Auteur ; Christopher W. Bater, Auteur ; Adam R. Dick, Auteur Année de publication : 2019 Article en page(s) : pp 76 - 83 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes descripteurs IGN] Abies balsamea
[Termes descripteurs IGN] Alberta
[Termes descripteurs IGN] allométrie
[Termes descripteurs IGN] betula papyrifera var. papyrifera
[Termes descripteurs IGN] diamètre à hauteur de poitrine
[Termes descripteurs IGN] diamètre des arbres
[Termes descripteurs IGN] données dendrométriques
[Termes descripteurs IGN] forêt boréale
[Termes descripteurs IGN] hauteur des arbres
[Termes descripteurs IGN] image terrestre
[Termes descripteurs IGN] inventaire forestier (techniques et méthodes)
[Termes descripteurs IGN] peuplement mélangé
[Termes descripteurs IGN] photogrammétrie terrestre
[Termes descripteurs IGN] Picea glauca
[Termes descripteurs IGN] picea mariana
[Termes descripteurs IGN] Pinus contorta
[Termes descripteurs IGN] populus tremuloides
[Termes descripteurs IGN] semis de points
[Termes descripteurs IGN] volume en boisRésumé : (auteur) Key Message: This study showed that digital terrestrial photogrammetry is able to produce accurate estimates of stem volume and diameter across a range of species and tree sizes that showed strong correspondence when compared with traditional inventory techniques. This paper demonstrates the utility of the technology for characterizing trees in complex habitats such as boreal mixedwood forests.
Context: Accurate knowledge of tree stem taper and volume are key components of forest inventories to manage and study forest resources. Recent developments have seen the increasing use of ground-based point clouds, including from digital terrestrial photogrammetry (DTP), to provide accurate estimates of these key forest attributes.
Aims: In this study, we evaluated the utility of DTP based on a small set of photos (12 per tree) for estimating stem volume and taper on a set of 15 trees from 6 different species (Populus tremuloides, Picea glauca, Pinus contorta latifolia, Betula papyrifera, Picea mariana, Abies balsamea) in a boreal mixedwood forest in Alberta, Canada.
Methods: We constructed accurate photogrammetric point clouds and derived taper and volume from three point cloud–based methods, which were then compared with estimates from conventional, field-based measurements. All methods were evaluated for their accuracy based on field-measured taper and volume of felled trees.
Results: Of the methods tested, we found that the point cloud–derived diameters in a taper curve matching approach performed the best at estimating diameters at the lowest parts of the stem ( 50% of total height). Using the field-measured DBH and height as inputs to calculate stem volume yielded the most accurate predictions; however, these were not significantly different from the best point cloud-based estimates.
Conclusion: The methodology confirmed that using a small set of photographs provided accurate estimates of individual tree DBH, taper, and volume across a range of species and size gradients (10.8–40.4 cm DBH).Numéro de notice : A2019-303 Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-019-0852-9 date de publication en ligne : 08/08/2019 En ligne : https://doi.org/10.1007/s13595-019-0852-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93226
in Annals of Forest Science [en ligne] > Vol 76 n° 3 (September 2019) . - pp 76 - 83[article]Wood quality of black spruce and balsam fir trees defoliated by spruce budworm: A case study in the boreal forest of Quebec, Canada / Carlos Paixao in Forest ecology and management, vol 437 (1 April 2019)
![]()
[article]
Titre : Wood quality of black spruce and balsam fir trees defoliated by spruce budworm: A case study in the boreal forest of Quebec, Canada Type de document : Article/Communication Auteurs : Carlos Paixao, Auteur ; Cornelia Krause, Auteur ; Hubert Morin, Auteur ; Alexis Achim, Auteur Année de publication : 2019 Article en page(s) : pp 201-210 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Abies balsamea
[Termes descripteurs IGN] biomasse forestière
[Termes descripteurs IGN] bois sur pied
[Termes descripteurs IGN] croissance végétale
[Termes descripteurs IGN] défoliation
[Termes descripteurs IGN] densité du bois
[Termes descripteurs IGN] diamètre des arbres
[Termes descripteurs IGN] données dendrométriques
[Termes descripteurs IGN] forêt boréale
[Termes descripteurs IGN] insecte nuisible
[Termes descripteurs IGN] picea mariana
[Termes descripteurs IGN] qualité du bois
[Termes descripteurs IGN] Québec (Canada)
[Termes descripteurs IGN] télédétection aérienneRésumé : (auteur) Spruce budworm (SBW – Choristoneura fumiferana Clem.) is one of the most damaging defoliating insects in the coniferous forests of eastern North America. In Canada, the widely distributed balsam fir (Abies balsamea L. (Mill)) and black spruce (Picea mariana B.S.P. (Mill)) are its most important hosts. Defoliation by SBW reduces growth in the host trees and can lead to host mortality. Although SBW impacts on growth are well documented, much less is known about changes in wood properties resulting from defoliation. To address this knowledge gap, we sampled 36 SBW-infested stands located in the boreal forest of Quebec (Canada) to determine whether defoliation modifies the wood quality of affected trees. The selected stands had been subjected to one to four years of SBW defoliation. For both species, we assessed ring growth, wood density, and the anatomical characteristics of stem wood formed during the outbreak years. We determined that rings formed during the SBW outbreak had a significant and progressive loss of biomass production with a longer duration of defoliation. SBW significantly reduced latewood density in the second and third year of defoliation for black spruce and the third and fourth year for balsam fir. Average ring density was reduced only in black spruce and only after four years of defoliation. The observed changes in growth and density were associated with changes in anatomical features. While the cellular characteristics of the earlywood remained fairly constant, significant reductions occurred in latewood cell-wall thickness after three years of defoliation. Our study shows that not only do SBW outbreaks reduce annual radial growth, but the cellular characteristics in latewood cells are also modified momentarily. Thus, SBW outbreaks affect wood density and quality in both black spruce and balsam fir. Numéro de notice : A2019-484 Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.foreco.2019.01.032 date de publication en ligne : 01/02/2019 En ligne : https://doi.org/10.1016/j.foreco.2019.01.032 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93661
in Forest ecology and management > vol 437 (1 April 2019) . - pp 201-210[article]Analyzing the vertical distribution of crown material in mixed stand composed of two temperate tree species / Olivier Martin-Ducup in Forests, vol 9 n° 11 (November 2018)
![]()
[article]
Titre : Analyzing the vertical distribution of crown material in mixed stand composed of two temperate tree species Type de document : Article/Communication Auteurs : Olivier Martin-Ducup, Auteur ; Robert Schneider, Auteur ; Richard A. Fournier, Auteur Année de publication : 2018 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes descripteurs IGN] Abies balsamea
[Termes descripteurs IGN] acer saccharum
[Termes descripteurs IGN] densité du feuillage
[Termes descripteurs IGN] données lidar
[Termes descripteurs IGN] données localisées 3D
[Termes descripteurs IGN] écologie forestière
[Termes descripteurs IGN] feuille (végétation)
[Termes descripteurs IGN] houppier
[Termes descripteurs IGN] voxelRésumé : (Auteur) The material distribution inside tree crowns is difficult to quantify even though it is an important variable in forest management and ecology. The vertical distribution of a relative density index (i.e., vertical profile) of the total, woody, and leafy material at the crown scale were estimated from terrestrial laser scanner (TLS) data on two species, sugar maple (Acer saccharum Marsh.) and balsam fir (Abies Balsamea Mill.). An algorithm based on a geometrical approach readily available in the Computree open source platform was used. Beta distributions were then fitted to the vertical profiles and compared to each other. Total and leafy profiles had similar shapes, while woody profiles were different. Thus, the total vertical distribution could be a good proxy for the leaf distribution in the crown. Sugar maple and balsam fir had top heavy and bottom heavy distributions respectively, which can be explained by their respective architectural development. Moreover, the foliage distribution of sugar maples shifted towards the crown base when it was found in mixed stands, when compared to pure stands. The opposite behavior was observed for balsam firs, but less pronounced. According to the shape of the foliage distribution, sugar maple takes advantages from mixture contrarily to balsam fir. From a methodological point of view, we proposed an original approach to separate wood from leaf returns in TLS data while taking into account occlusion. Wood and leaf separation and occlusion problems are two challenging issues for most TLS-based studies in forest ecology. Numéro de notice : A2018-487 Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/f9110673 date de publication en ligne : 26/10/2018 En ligne : https://doi.org/10.3390/f9110673 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91223
in Forests > vol 9 n° 11 (November 2018)[article]Evaluation of 10-year temporal and spatial variability in structure and growth across contrasting commercial thinning treatments in spruce-fir forests of northern Maine, USA / Christian Kuehne in Annals of Forest Science [en ligne], vol 75 n° 1 (March 2018)
![]()
[article]
Titre : Evaluation of 10-year temporal and spatial variability in structure and growth across contrasting commercial thinning treatments in spruce-fir forests of northern Maine, USA Type de document : Article/Communication Auteurs : Christian Kuehne, Auteur ; Aaron R. Weiskittel, Auteur ; Arne Pommerening, Auteur ; Robert G. Wagner, Auteur Année de publication : 2018 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Abies balsamea
[Termes descripteurs IGN] arbre aléatoire
[Termes descripteurs IGN] éclaircie (sylviculture)
[Termes descripteurs IGN] Maine (Etats-Unis)
[Termes descripteurs IGN] Picea rubens
[Termes descripteurs IGN] Pinus strobus
[Termes descripteurs IGN] station forestière
[Termes descripteurs IGN] thuja (genre)
[Vedettes matières IGN] SylvicultureRésumé : (Auteur) Key message: Detailed measures of growth pattern and structural heterogeneity applied in this study helped to quantify the immediate effects of various thinning regimes on forest structure and the resulting alterations in tree size as well as observed longer term stand dynamics.
Context: Forest management, stand structure, and tree growth are highly inter-correlated. Prior analyses, however, have resulted in mixed outcomes with limited success in revealing ecological mechanisms.
Aims: The study aimed at evaluating the relationship between forest structure and stand dynamics by applying several sophisticated measures of growth pattern and structural heterogeneity.
Methods : Data from a controlled and fully stem-mapped commercial thinning experiment with seven contrasting treatments including a non-thinned control at six locations across the Acadian Forest of Maine, USA, was used. Stand-level attributes examined included tree size and growth heterogeneity, spatial tree distribution, and growth dominance.
Results: Thinning generally reduced stand structural heterogeneity compared to the non-thinned control. In addition, the spatial arrangement of trees changed from fully random (non-thinned control) to a more clustered (removal of dominant and co-dominant individuals) or regular distribution (removal of intermediate and suppressed individuals). Overall, stand growth exhibited increasing (non-thinned control, removal of intermediate and suppressed individuals) or decreasing growth dominance of large trees (removal of co-dominant competitors). Forwarder trails increased basal area growth of individual trees up to a distance from the trail of approximately 5 m.
Conclusion: Findings of this study validate an earlier insight according to which interactions between management practices, forest structure, and tree growth form a permanent feedback loop.
KeywordsNuméro de notice : A2018-315 Thématique : BIODIVERSITE/FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-018-0697-7 date de publication en ligne : 26/02/2018 En ligne : https://doi.org/10.1007/s13595-018-0697-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90439
in Annals of Forest Science [en ligne] > vol 75 n° 1 (March 2018)[article]Effects of a spruce budworm outbreak on element export below the rooting zone: a case study for a balsam fir forest / Daniel Houle ; Louis Duchesne ; Robert Boutin in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)
![]()
[article]
Titre : Effects of a spruce budworm outbreak on element export below the rooting zone: a case study for a balsam fir forest Titre original : Effets d'une attaque de tordeuse des bourgeons de l'épinette sur l'exportation d'éléments au-dessous de la zone racinaire : une étude de cas dans une forêt de sapins baumiers Type de document : Article/Communication Auteurs : Daniel Houle, Auteur ; Louis Duchesne, Auteur ; Robert Boutin, Auteur Année de publication : 2009 Article en page(s) : 9 p. Note générale : DOI: 10.1051/forest/2009057. Résumé en anglais et français. Bibliogr. Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Abies balsamea
[Termes descripteurs IGN] Canada
[Termes descripteurs IGN] forêt boréale
[Termes IFN] fertilité des sols
[Termes IFN] santé des forêtsRésumé : (Auteur) "Les épidémies de la tordeuse des bourgeons de l'épinette sont parmi les principales perturbations naturelles qui affectent la dynamique et le fonctionnement des forêts boréales canadiennes. Toutefois, les éléments potentiellement perdus associés à une épidémie de la tordeuse des bourgeons de l'épinette n'ont pas été quantifiés. Nous avons évalué l'influence des épidémies de tordeuse des bourgeons de l'épinette sur l'exportation des éléments nutritifs des sols de la forêt boréale, en comparant les pertes par lessivage des éléments nutritifs au cours d'un épisode d'épidémie de la tordeuse des bourgeons de l'épinette (1981–1984) à une période non perturbée (1999–2003) dans un bassin versant calibré situé dans une forêt de sapin baumier. Les pertes par lessivage des éléments nutritifs du sol ont été significativement plus élevées au cours de l'épidémie de la tordeuse des bourgeons de l'épinette (1981–1984) pour N-NO3 (30,1 fois), K (8,3 fois), N-NH4 (6,2 fois), Mg (2,7 fois) and SO4 (2,2 fois), de N-NO3 (par rapport à une période non perturbée (1999–2003). Quand la répétition des épidémies de tordeuse des bourgeons de l'épinette (33 ans) et une durée moyenne plausible de ces événements (5 ans) sont prises en considération, il est estimé que dans le long terme, 5,6 fois plus de NO3, 1,5 fois plus de K et 1,2 fois plus de NH4 sont lessivés du profil du sol durant les épidémies. Les importantes pertes par lessivage lors des épidémies de tordeuse des bourgeons de l'épinette, ajoutées aux pertes dues à la récolte des arbres et au feu (et des dépôts acides pour K), peuvent avoir des effets considérables sur la fertilité des sols et la durabilité de l'écosystème." Numéro de notice : IFN_4707 Thématique : FORET Nature : Article En ligne : http://www.afs-journal.org/index.php?option=article&access=standard&Itemid=129&u [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72831
in Annals of Forest Science > Vol 66 n° 7 (October - November 2009) . - 9 p.[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité IFN-001-P000668 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt