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Termes IGN > sciences naturelles > sciences de la vie > biologie > botanique > botanique systématique > Tracheophyta > Spermatophytina
SpermatophytinaSynonyme(s)phanérogame |
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Is 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)
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Titre : Is the spatial distribution of European beech (Fagus sylvatica L.) limited by its potential height growth? Type de document : Article/Communication Auteurs : Ingrid Seynave, Auteur ; Jean-Claude Gégout, Auteur ; Jean-Christophe Hervé (1961-2017) , Auteur ; Jean-François Dhôte, Auteur
Année de publication : 2008 Article en page(s) : pp 1851 - 1862 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] changement climatique
[Termes IGN] distribution spatiale
[Termes IGN] facteur édaphique
[Termes IGN] Fagus sylvatica
[Termes IGN] inventaire forestier national (données France)
[Termes IGN] krigeage
[Termes IGN] régression linéaire
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) Aim : To improve our understanding of species range limits by studying how height growth, a trait related to plant survival, varies throughout the geographic range of Fagus sylvatica L. in France.
Location : The geographic range of beech in France, representing the western area of its European distribution, within which this species exhibits range distribution limits in both plains and mountainous areas.
Methods : A generalized linear regression model was used to link beech growth performance to environmental variables using data from 819 plots of the French National Forest Inventory (IFN) database. This model was applied to predict potential growth on 97,281 IFN plots covering the geographic range of beech in France. A kriging technique was used to interpolate estimated growth potential. Finally, the performance of plot-based predictions of potential growth from the map (i.e. map quality) was evaluated against an independent data set.
Results : The beech growth performance model highlighted the major impact of climate on potential tree growth at a broad spatial scale. The relevant climatic factors were related mainly to spring cold, summer heat, and winter temperatures and rainfall. The study also revealed the predictive power of soil parameters, which explained a large proportion of the variation in potential beech growth (c. 30%). Analyses of height growth patterns near the boundary of the species range in France showed that the limit only partly coincides with the growth decline caused by climatic and soil factors. Along parts of the range limit, the predicted potential for growth was high, suggesting that in these areas the limit of the range could be explained by other factors, such as competition or constraints on reproduction.
Main conclusions : The spatial variation in the potential height growth of Fagus sylvatica can be explained by environmental factors and is partly correlated with its regional range limits. By identifying areas where growth potential constrains the geographic range of species, environmental growth models can help to improve our knowledge of the spatial drivers of species geographic range limits and shed light on their response to future environmental changes.Numéro de notice : A2008-664 Affiliation des auteurs : IFN+Ext (1958-2011) Thématique : FORET Nature : Article DOI : 10.1111/j.1365-2699.2008.01930.x En ligne : http://doi.org/10.1111/j.1365-2699.2008.01930.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=87106
in Journal of Biogeography > vol 35 n° 10 (October 2008) . - pp 1851 - 1862[article]A quantitative assessment of the ecological value of sycamore maple habitats in the French Alps / Yoan Paillet in Annals of Forest Science, Vol 65 n° 7 (October - November 2008)
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Titre : A quantitative assessment of the ecological value of sycamore maple habitats in the French Alps Titre original : Une évaluation quantitative de la valeur écologique des érablaies de versant dans les Alpes françaises Type de document : Article/Communication Auteurs : Yoan Paillet, Auteur ; Yoan Paillet, Auteur ; Frédéric Archaux, Auteur ; Vincent Breton, Auteur ; Jean-Jacques Brun, Auteur Année de publication : 2008 Article en page(s) : n° 713 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Acer pseudoplatanus
[Termes IGN] Alpes (France)
[Termes IGN] Chartreuse, massif de la (Préalpes ; France)
[Termes IGN] conservation de la flore
[Termes IGN] indicateur biologique
[Termes IGN] politique de conservation (biodiversité)
[Vedettes matières IGN] Ecologie forestièreRésumé : (auteur) Naturalness is an important criterion in nature conservation assessment. At the stand-level, such assessment must be based on objective and quantifiable indicators measurable in the field. In this study, we used a multi-criterion method based on the difference between a Natural Value (NV) and a Conservation Value (CV) to quantify the ecological value of sycamore maple patches compared to the surrounding mixed forests. Indeed, sycamore habitats are considered of high natural and conservation value both by naturalists and by European institutions. Our results showed that the natural and conservation values were significantly higher for the sycamore forests than for the surrounding mixed forests and that this assessment did not depend on abiotic factors such as elevation or aspect. Actually, naturalness of structure and composition in the sycamore habitats was higher than for mixed forests and allowed us to differentiate between the two habitats. Managers could easily use this method in order to assess the ecological value of small habitats in mountainous regions and to provide guidelines for close-to-nature and conservation-related silviculture. Numéro de notice : A2008-694 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/FORET Nature : Article DOI : 10.1051/forest:2008058 Date de publication en ligne : 24/10/2008 En ligne : https://doi.org/10.1051/forest:2008058 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71445
in Annals of Forest Science > Vol 65 n° 7 (October - November 2008) . - n° 713[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000234 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt Ten years of fluxes and stand growth in a young beech forest at Hesse, North-eastern France / André Granier in Annals of Forest Science, Vol 65 n° 7 (October - November 2008)
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Titre : Ten years of fluxes and stand growth in a young beech forest at Hesse, North-eastern France Titre original : Dix années de mesures de flux et de croissance dans une jeune hêtraie du nord-est de la France, en forêt de Hesse Type de document : Article/Communication Auteurs : André Granier, Auteur ; Nathalie Bréda, Auteur ; Bernard Longdoz, Auteur ; Patrick Gross, Auteur ; Jérôme Ngao, Auteur Année de publication : 2008 Article en page(s) : n° 13 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bioclimatologie
[Termes IGN] biomasse forestière
[Termes IGN] croissance des arbres
[Termes IGN] dioxyde de carbone
[Termes IGN] évapotranspiration
[Termes IGN] Fagus sylvatica
[Termes IGN] France (administrative)
[Termes IGN] Hesse, forêt de (Meuse)
[Termes IGN] hêtraie
[Termes IGN] production primaire brute
[Termes IGN] stress hydrique
[Termes IGN] variation saisonnière
[Vedettes matières IGN] SylvicultureRésumé : (auteur) Water and carbon fluxes, as measured by eddy covariance, climate, soil water content, leaf area index, tree biomass, biomass increment (BI), litter fall and mortality were monitored for 10 successive years in a young beech stand in Hesse forest (north-eastern France) under contrasting climatic and management conditions. Large year-to-year variability of net carbon fluxes (NEE) and to a lesser extent, of tree growth was observed. The variability in NEE (coefficient of variation, CV = 44%) was related to both gross primary production (GPP) and to variations in total ecosystem respiration (TER), each term showing similar and lower interannual variability (CV = 14%) than NEE. Variation in the annual GPP was related to: (i) the water deficit duration and intensity cumulated over the growing season, and (ii) the growing season length, i.e. the period of carbon uptake by the stand. Two thinnings occurring during the observation period did not provoke a reduction in either GPP, water fluxes, or in tree growth. Interannual variation of TER could not be explained by any annual climatic variables, or LAI, and only water deficit duration showed a poor correlation. Annual biomass increment was well correlated to water shortage duration and was significantly influenced by drought in the previous year. The relationship between annual NEE and biomass increment (BI) was poor: in some years, the annual carbon uptake was much higher and in others much lower than tree growth. However this relationship was much stronger and linear (r2 = 0.93) on a weekly to monthly time-scale from budburst to the date of radial growth cessation, indicating a strong link between net carbon uptake and tree growth, while carbon losses by respiration occurring after this date upset this relationship. Despite the lack of correlation between annual data, the NEE and BI cumulated over the 10 years of observations were very close. On the annual time-scale, net primary productivity calculated from eddy fluxes and from biological measurements showed a good correlation. Numéro de notice : A2008-690 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2008052 Date de publication en ligne : 24/10/2008 En ligne : https://doi.org/10.1051/forest:2008052 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71436
in Annals of Forest Science > Vol 65 n° 7 (October - November 2008) . - n° 13[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000234 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt The compact polarimetry alternative for spaceborne SAR at low frequency / P. Dubois-Fernandez in IEEE Transactions on geoscience and remote sensing, vol 46 n° 10 Tome 2 (October 2008)
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Titre : The compact polarimetry alternative for spaceborne SAR at low frequency Type de document : Article/Communication Auteurs : P. Dubois-Fernandez, Auteur ; J.C. Souyris, Auteur ; S. Angelliaume, Auteur ; et al., Auteur Année de publication : 2008 Conférence : IGARSS 2007, International Geoscience And Remote Sensing Symposium, sensing and understanding our planet 23/07/2007 27/07/2007 Barcelone Espagne Proceedings IEEE Article en page(s) : pp 3208 - 3222 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bande L
[Termes IGN] données polarimétriques
[Termes IGN] forêt tempérée
[Termes IGN] image ALOS-PALSAR
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] Landes (40)
[Termes IGN] Pinus pinaster
[Termes IGN] polarimétrie radarRésumé : (Auteur) In spaceborne synthetic aperture radar (SAR), a single-polarization on-transmit offers twice the swath width compared to full polarization. This is linked to SAR system design issues, and, without getting into the technical details deserving by themselves a full paper, we can just mention the swath characteristics of ALOS PALSAR (the Advanced Land Observing Satellite, Phased Array L-Band Synthetic Aperture Radar), reducing from 70 km for the dual-pol mode to 30 km for the full polarization mode. The reduced coverage in the full polarization mode has a harmful impact on the revisit time, which is always a major drive for the Earth-observing community. The options chosen up to now for dual-pol system designs (or single-polarization on-transmit) rely on a linear polarization on-transmit [either horizontal (H) or vertical (V)], with two orthogonal polarizations on-receive. Souyris and Raney in earlier papers proposed more pertinent alternatives for the selection of the transmit polarization leading to a better characterization of the scattering mechanisms. In this paper, the analysis is pursued in more depth by including the effect of the ionosphere on the wave propagation and extending the applications to polarimetric interferometry SAR (PolInSAR). A compact mode is developed where the transmit polarization is circular, whereas the only constraint on the two receiving polarizations is independence. Indeed, the choice of the polarizations of the two receive channels does not matter, as any polarization on-receive can be synthesized from these two measurements. This is, however, not the case for the unique transmit polarization. At a low frequency, where the ionosphere has a significant effect, the circular transmit polarization is the only sensible option, as it provides an effective constant polarization as seen by the scattering surface. This is an essential condition for a meaningful multitemporal analysis. Both the polarimetric SAR applications and the PolInSAR applications in the context of this compact polarimetry (CP) mode are explored. A pseudocovariance matrix can be reconstructed following Souyris' proposed approach for distributed targets and is shown to be very similar to the full polarimetric (FP) covariance matrix. The reconstruction of the cross-polarized Sigma0 is shown to be reliable and to have very low sensitivity to Faraday rotation. A PolInSAR vegetation height inversion for P-band is presented and applied to the CP data with a level of performance that is similar to the one derived from FP (a 1.2-m root-mean-square height error on the ONERA Airborne radar (RAMSES) data over the Landes Forest). A procedure is developed to correct for the ionospheric effects for the PolInSAR acquisition in the FP or CP mode and is assessed on the data simulated from an airborne acquisition. The results demonstrate that the technique is efficient and robust. The calibration of CP data is identified as an important challenge to be solved, and some clues are provided to address the problem. Numéro de notice : A2008-529 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2008.919143 En ligne : https://doi.org/10.1109/TGRS.2008.919143 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29599
in IEEE Transactions on geoscience and remote sensing > vol 46 n° 10 Tome 2 (October 2008) . - pp 3208 - 3222[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-08101B RAB Revue Centre de documentation En réserve L003 Disponible Ultrasonic tomography of green wood using a non-parametric imaging algorithm with reflected waves / Loïc Brancheriau in Annals of Forest Science, Vol 65 n° 7 (October - November 2008)
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Titre : Ultrasonic tomography of green wood using a non-parametric imaging algorithm with reflected waves Titre original : Tomographie ultrasonore de bois vert par reconstruction d'image non paramétrique en réflexion Type de document : Article/Communication Auteurs : Loïc Brancheriau, Auteur ; Philippe Lasaygues, Auteur ; Eric Debieu, Auteur ; Jean Pierre Lefebvre, Auteur Année de publication : 2008 Article en page(s) : n° 712 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] approximation
[Termes IGN] Picea abies
[Termes IGN] tomographie
[Termes IGN] ultrasonRésumé : (auteur) Ultrasonic computed tomography in reflection was used to assess the integrity of green wood. Qualitative reflectivity images were obtained from back-scattered measurements by reflection tomography, like ultrasound in medical applications. The reconstruction algorithm was designed using, in particular, a linear approximation of the forward problem (Born approximation) and based on the assumption that a transversal cross section of wood is isotropic. The experimental device was composed of only one rotating emitter–receiver transducer to record and compute the projections. In this specific case, a tomographic projection was directly associated with a recorded signal. The qualitative aspect of this imaging technique was validated by performing a numerical simulation and tested on a small diameter green wood (Picea abies) log. The images obtained were geometrically accurate considering the internal inclusions. It was, however, not possible in the simulation to differentiate the object shape from the background (coupling medium) because the reflectivity value associated with the object was too low. The image obtained with the spruce sample mainly showed the position of the bark as indicated by a very high contrast area. The proportion of transmitted energy was, however, sufficient to reconstruct the artificial inclusion within the sample. Numéro de notice : A2008-693 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.1051/forest:200851 Date de publication en ligne : 20/09/2008 En ligne : https://doi.org/10.1051/forest:200851 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71444
in Annals of Forest Science > Vol 65 n° 7 (October - November 2008) . - n° 712[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000234 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt Les cloisonnements sylvicoles ont-ils un effet significatif sur la forme des tiges de hêtre ? / François Conrard in Rendez-vous techniques, n° 20 (mai 2008)
PermalinkRésineux du Haut-Doubs : demande soutenue et légère baisse / André Choby in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 31 (20 septembre 2008)
PermalinkTaillis à très courte rotation : l'emploi multiple du saule / Fabienne Tisserand in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 31 (20 septembre 2008)
PermalinkLa scierie Fruytier opérationnelle mi-2009 / Pascal Charoy in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 30 (13 septembre 2008)
PermalinkCroissance du robinier en Aquitaine : les classes de fertilité / Dominique Merzeau ; V. Coquillas ; S. Bazas in Forêt entreprise, n° 182 (septembre 2008)
PermalinkInteractive responses of Quercus suber L. seedlings to light and mild water stress: effects on morphology and gas exchange traits / Jaime Puértolas in Annals of Forest Science, Vol 65 n° 6 (September 2008)
PermalinkPeuplier : besoins en eau et stations hors nappe / Eric Paillassa in Forêt entreprise, n° 182 (septembre 2008)
PermalinkPredicting decay and round-wood end use volume in trembling aspen (Populus tremuloides Michx.) / Robert Schneider in Annals of Forest Science, Vol 65 n° 6 (September 2008)
PermalinkProduction de biomasse à usage énergétique par la gestion des pineraies du Frioul (Italie) / Rafaelle Spinelli in Forêt méditerranéenne, vol 29 n° 3 (septembre 2008)
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