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Multi-wavelength canopy LiDAR for remote sensing of vegetation: Design and system performance / G. Wei in ISPRS Journal of photogrammetry and remote sensing, vol 69 (April 2012)
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Titre : Multi-wavelength canopy LiDAR for remote sensing of vegetation: Design and system performance Type de document : Article/Communication Auteurs : G. Wei, Auteur ; S. Shalei, Auteur ; Z. Bo, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 1 - 9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] couvert végétal
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] feuille (végétation)
[Termes IGN] Lidar
[Termes IGN] longueur d'onde
[Termes IGN] Oryza (genre)
[Termes IGN] réflectance végétaleRésumé : (Auteur) A new multi-wavelength canopy LiDAR (MWCL) system intended for the remote sensing of vegetation reflection was designed and its measurement performance was investigated. The system operates with four lasers of different wavelengths chosen according to nitrogen stresses that induce changes in the optical properties and spectral reflectance of rice leaves. The optical design and instrumentation are described in this paper as well as a discussion on system calibration. The MWCL system was demonstrated to possess a high capability of recording the physiology of the canopy, which is not possible when solely employing a traditional single-wavelength LiDAR. Numéro de notice : A2012-192 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.02.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.02.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31639
in ISPRS Journal of photogrammetry and remote sensing > vol 69 (April 2012) . - pp 1 - 9[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2012031 SL Revue Centre de documentation Revues en salle Disponible 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)
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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]Using multi-frequency radar and discrete-return LiDAR measurements to estimate above-ground biomass and biomass components in a coastal temperate forest / O. Tsui in ISPRS Journal of photogrammetry and remote sensing, vol 69 (April 2012)
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Titre : Using multi-frequency radar and discrete-return LiDAR measurements to estimate above-ground biomass and biomass components in a coastal temperate forest Type de document : Article/Communication Auteurs : O. Tsui, Auteur ; Nicholas C. Coops, Auteur ; Michael A. Wulder, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 121 - 133 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] biomasse
[Termes IGN] Colombie-Britannique (Canada)
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] forêt tempérée
[Termes IGN] image radar
[Termes IGN] Pinophyta
[Termes IGN] polarimétrie radarRésumé : (Auteur) Height measurements from small-footprint discrete-return LiDAR and backscatter coefficients from C- and L-band radar were used independently and in combination to estimate above-ground component and total biomass for a coniferous temperate forest, located on Vancouver Island, British Columbia, Canada. Reference biomass data were obtained from plot-level data and used for comparison against the LiDAR and radar-based biomass models. For the LiDAR-only model, height metrics such as mean first return height and percentiles (e.g., 10th and 90th) of first returns correlated best to total above-ground and stem biomass. While percent of first returns above 2 m and percentiles (75th and 90th) of first returns height metrics correlated best to crown biomass. A comparison between above-ground components and total biomass indicate that stem biomass displayed the highest relationship with the LiDAR measurements while crown biomass showed the lowest relationship with relative root mean squared error ranging from 16% to 22%, respectively. Alternatively, the radar-only models indicated that for C-band radar, a combination of HH and VV backscatter demonstrated the most significant correlation with forest biomass compared to coherence based models with a relative root mean squared error of 53%. For L-band radar, a combination of HH and HV backscatter showed the most significant correlation compared to coherence based models with a relative root mean squared error of 44%. Exploring a mixture of C- and L-band backscatter and coherence based models revealed that a combination of C-HV and L-HV coherence magnitudes provided the best radar relationship with forest biomass with a relative root mean squared error of 35%. Also for all radar-based models, L- and C-band backscatter and coherence magnitudes were poorly correlated with individual biomass components when compared to total above-ground biomass. The addition of C- and L-band backscatter and coherence variables to the LiDAR-only biomass model was also investigated. The results showed that the integration of C-band HH backscatter to the LiDAR-only model significantly improved the relationship with forest biomass by explaining an additional 8.9% and 6.5% of the variability in total aboveground and stem biomass respectively, while C-band polarimetric entropy explained an additional 17.9% of the variability in crown biomass. Improvements in the relative root mean squared errors were also observed ranging from 7.1% to 11.7%. The study suggests that for a temperate forest dominated by coniferous stands, the addition of C-band radar variables to a best LiDAR-only linear model provides improved estimates of above-ground component and total biomass. Numéro de notice : A2012-196 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.02.009 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.02.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31643
in ISPRS Journal of photogrammetry and remote sensing > vol 69 (April 2012) . - pp 121 - 133[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2012031 SL Revue Centre de documentation Revues en salle Disponible 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]Does natural regeneration determine the limit of European beech distribution under climatic stress? / Daniel E. Silva in Forest ecology and management, vol 266 (15 February 2012)
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Titre : Does natural regeneration determine the limit of European beech distribution under climatic stress? Type de document : Article/Communication Auteurs : Daniel E. Silva, Auteur Année de publication : 2012 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] aire de répartition
[Termes IGN] changement climatique
[Termes IGN] climat tempéré
[Termes IGN] Fagus sylvatica
[Termes IGN] inventaire forestier national (données France)
[Termes IGN] marge
[Termes IGN] régénération (sylviculture)
[Termes IGN] régression multiple
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) Climate is considered to be the main factor that determines forest species distribution. In Europe, climatic series show a global warming trend and an increase in frequency of summer droughts, which should affect growth and regeneration of tree populations. Beech (Fagus sylvatica L.) is particularly sensitive to drought and high temperatures. Then, this species reaches the rear edge of its lowland European distribution in the south-west of France. In this area, statistical modelling of future distributions based on climate scenarios show a significant potential reduction for F. sylvatica’s range. At the moment, failure of beech establishment is still unknown at the regional scale in the rear edge of its distribution range. The aim of this study was thus to determine if a reduction in natural regeneration of beechwoods could be related to the decrease in the species presence at its range margin. We identified ecological factors related to beech recruitment by estimating seedling density on the forest floor respectively in 71 and 85 beech plots in the south-west lowlands of France. We also determined if a relation between seedling amount and mast-seeding existed. We showed the importance of local factors in the natural regeneration stages by performing a multivariate reduction of the data and a multiple regression on densities. The inherent capacity of the stand to produce fruits explained a greater part of cupule density variance than did the climatic factor. However, we observed that meso-, micro- and pedo-climates were the main factors controlling seedling amount. Higher soil moisture, precipitation and temperature during the growing season increased seedling density, while late spring and early autumn frosts decreased it. Soil and stand conditions also played a significant role. Fruit production increased in stands that showed tree crown degradation, while seedling amount decreased in this case. The increase in allocation to reproduction could be a strategy of beech to cope with ecological constraints that tend to limit its establishment. Thus, seedling establishment is related to the factors controlling F. sylvatica presence at its southern distribution margins. This illustrates how natural regeneration is a key stage for beech success where the future of the species is jeopardized in the context of climate change. Numéro de notice : A2012-725 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1016/j.foreco.2011.11.031 Date de publication en ligne : 16/12/2011 En ligne : http://doi.org/10.1016/j.foreco.2011.11.031 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=87072
in Forest ecology and management > vol 266 (15 February 2012)[article]Automatic stem mapping using single-scan terrestrial laser scanning / X. Liang in IEEE Transactions on geoscience and remote sensing, vol 50 n° 2 (February 2012)
PermalinkCarbon Stock of European Beech Forest : A Case at M. Pizzalto, Italy / Aida Taghavi Bayat in APCBEE Procedia, vol 1 (2-20)
PermalinkContribution au prodrome des végétations de France : les Cisto ladaniferi - Lavanduletea stoechadis Braun-Blanq. in Braun-Blanq., Molin. & Wagner 1940 / Bruno de Foucault in Journal de botanique, n° 57 (2012)
PermalinkPermalinkPotential of an ultraviolet, medium-footprint lidar prototype for retrieving forest structure / Tristan Allouis in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 supplement (December 2011)
PermalinkOak (Quercus robur L.) regeneration as a response to natural dynamics of stands in European hemiboreal zone / Andrzej Bobiec in European Journal of Forest Research, vol 130 n° 5 (September 2011)
PermalinkMulti-level filtering segmentation to measure individual tree parameters based on Lidar data: Application to a mountainous forest with heterogeneous stands / Cédric Vega in International journal of applied Earth observation and geoinformation, vol 13 n° 4 (August 2011)
PermalinkFull waveform-based analysis for forest type information derivation from large footprint spaceborne lidar data / Junjie Zhang in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 3 (March 2011)
PermalinkMonitoring elevation variations in leaf phenology of deciduous broadleaf forests from SPOT/VEGETATION time-series / Dominique Guyon in Remote sensing of environment, vol 115 n° 2 ([15/02/2011])
PermalinkPermalinkPermalinkPermalinkUse of high-resolution satellite imagery in an integrated model to predict the distribution of shade coffee tree hybrid zones / C. Gomez in Remote sensing of environment, vol 114 n° 11 (15/11/2010)
PermalinkApport de la dendrogéomorphologie pour la reconstruction spatio-temporelle des avalanches / Christophe Corona in Collection EDYTEM. cahiers de géographie, n° 11 (01/09/2010)
PermalinkLe couvert forestier, marqueur spatio-temporel de l'activité d'un glissement de terrain / Jérôme Lopez Saez in Collection EDYTEM. cahiers de géographie, n° 11 (01/09/2010)
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)
PermalinkPermalinkRange and AGC normalization in airborne discrete-return LiDAR intensity data for forest canopies / Ilkka Korpela in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 4 (July - August 2010)
PermalinkUne essence mal aimée à promouvoir et valoriser in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 22 (12 juin 2010)
PermalinkContribution à l’étude des forêts hygrosciaphiles de ravins à affinités atlantiques en Franche-Comté / Rémi Collaud in Nouvelles Archives de la Flore jurassienne et du nord-est de la France, n° 8 (2010)
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