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Interactive effects of drought and pathogens in forest trees / Marie-Laure Desprez-Loustau in Annals of Forest Science, Vol 63 n° 6 (september 2006)
[article]
Titre : Interactive effects of drought and pathogens in forest trees Titre original : Interactions entre sécheresse et agents pathogènes chez les arbres forestiers Type de document : Article/Communication Auteurs : Marie-Laure Desprez-Loustau, Auteur ; Benoît Marçais, Auteur ; Louis-Michel Nageleisen, Auteur ; Dominique Piou, Auteur ; Andrea Vannini, Auteur Année de publication : 2006 Article en page(s) : p. 597 - 612 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] dépérissement
[Termes IGN] forêt
[Termes IGN] maladie phytosanitaire
[Termes IGN] sécheresse
[Termes IGN] stress hydrique
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (Auteur) This review synthesizes the available knowledge on drought-disease interactions in forest trees with a focus on (1) evidence and patterns of drought-disease interactions, (2) current understanding of processes and mechanisms, and (3) three well documented cases studies. The first part is based on the analysis of a database of slightly more than one hundred studies, obtained by keyword searches combining drought, diseases or pathogens, and forest trees. A large majority of published studies referred to a positive association between drought and disease, i.e. disease favoured by drought or drought and disease acting synergistically on tree health status, with a predominance of canker/dieback diseases, caused by pathogens like Botryosphaeria, Sphaeropsis, Cytospora and Biscognauxia (Hypoxylon). The type of disease-related variables (incidence vs. severity) and the intensity and timing of water stress were shown to be significant factors affecting the drought- infection interaction. Interactions with other abiotic stresses and species-specific and genetic effects, related to host or pathogen, have also been reported. Direct effects of drought on pathogens are generally negative, although most fungal pathogens exhibit an important plasticity and can grow at water potentials well below the minimum for growth of their host plants. Studies on indirect effects of drought on pathogens through other community interactions are still relatively scarce. Positive drought-infection effects can mostly be explained by indirect effects of drought on host physiology. The predisposition and the multiple stress hypotheses are presented, as well as recent developments in the study of the molecular basis of abiotic and biotic stress, and their interactions. Sphaeropsis sapinea on pines, Biscognauxia mediterranea on oaks and root pathogens in declines associated with drought provide illustrative examples, treated as case studies, of pathogens of current significance associated with drought. The conclusion highlights some knowledge gaps, e.g. the role of latent parasites and the shift to a pathogenic stage, or the genetics of some fungal groups. The need for prevention of pathogen dispersal, especially crucial in the case of latent pathogens, is emphasized. Numéro de notice : A2006-667 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2006040 Date de publication en ligne : 14/09/2006 En ligne : https://doi.org/10.1051/forest:2006040 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72724
in Annals of Forest Science > Vol 63 n° 6 (september 2006) . - p. 597 - 612[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-001-P000644 PER Revue Nogent-sur-Vernisson Archives périodiques Exclu du prêt A spatial approach to forest-management optimization: linking GIS and multiple objective genetic algorithms / E.I. Ducheyne in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)
[article]
Titre : A spatial approach to forest-management optimization: linking GIS and multiple objective genetic algorithms Type de document : Article/Communication Auteurs : E.I. Ducheyne, Auteur ; R.R. DE Wulf, Auteur ; Bernard De Baets, Auteur Année de publication : 2006 Article en page(s) : pp 917 - 928 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] algorithme génétique
[Termes IGN] forêt
[Termes IGN] forêt tempérée
[Termes IGN] optimisation (mathématiques)
[Termes IGN] outil d'aide à la décision
[Termes IGN] sylvicultureRésumé : (Auteur) Forest-management decision-support systems are largely monolithic structures. Spatial details are left out during the optimization process and are elaborated during the operational planning. This might produce misleading results and plans that are impossible to implement. In this paper, a forest-management spatial decision-support systems is presented, in which spatial formulation needed for wildlife models is included during the optimization process. To this end, a multiple-objective genetic algorithm is combined with a geographical information system. An online spatial evaluation of the objective functions is made possible. This is illustrated by a pilot study in Kirkhill forest, Aberdeen. Copyright Taylor & Francis Numéro de notice : A2006-351 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810600711287 En ligne : https://doi.org/10.1080/13658810600711287 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28075
in International journal of geographical information science IJGIS > vol 20 n° 8 (september 2006) . - pp 917 - 928[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-06081 RAB Revue Centre de documentation En réserve L003 Disponible 079-06082 RAB Revue Centre de documentation En réserve L003 Disponible Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences / Nathalie Bréda in Annals of Forest Science, Vol 63 n° 6 (september 2006)
[article]
Titre : Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences Titre original : Arbres et peuplements forestiers tempérés soumis à sécheresse : une revue des réponses écophysiologiques, des processus d'adaptation et des conséquences à long terme Type de document : Article/Communication Auteurs : Nathalie Bréda, Auteur ; Roland Huc, Auteur ; André Granier, Auteur ; Erwin Dreyer, Auteur Année de publication : 2006 Article en page(s) : p. 625 - 644 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bilan hydrique
[Termes IGN] dépérissement
[Termes IGN] forêt tempérée
[Termes IGN] sécheresse
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (Auteur) The extreme drought event that occurred in Western Europe during 2003 highlighted the need to understand the key processes that may allow trees and stands to overcome such severe water shortages. We therefore reviewed the current knowledge available about such processes. First, impact of drought on exchanges at soil-root and canopy-atmosphere interfaces are presented and illustrated with examples from water and CO2 flux measurements. The decline in transpiration and water uptake and in net carbon assimilation due to stomatal closure has been quantified and modelled. The resulting models were used to compute water balance at stand level basing on the 2003 climate in nine European forest sites from the CARBOEUROPE network. Estimates of soil water deficit were produced and provided a quantitative index of soil water shortage and therefore of the intensity of drought stress experienced by trees during summer 2003. In a second section, we review the irreversible damage that could be imposed on water transfer within trees and particularly within xylem. A special attention was paid to the inter-specific variability of these properties among a wide range of tree species. The inter-specific diversity of hydraulic and stomatal responses to soil water deficit is also discussed as it might reflect a large diversity in traits potentially related to drought tolerance. Finally, tree decline and mortality due to recurrent or extreme drought events are discussed on the basis of a literature review and recent decline studies. The potential involvement of hydraulic dysfunctions or of deficits in carbon storage as causes for the observed long term (several years) decline of tree growth and development and for the onset of tree dieback is discussed. As an example, the starch content in stem tissues recorded at the end of the 2003's summer was used to predict crown conditions of oak trees during the following spring: low starch contents were correlated with large twig and branch decline in the crown of trees. Numéro de notice : A2006-669 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2006042 Date de publication en ligne : 14/09/2006 En ligne : https://doi.org/10.1051/forest:2006042 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72726
in Annals of Forest Science > Vol 63 n° 6 (september 2006) . - p. 625 - 644[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-001-P000644 PER Revue Nogent-sur-Vernisson Archives périodiques Exclu du prêt Assessment of forest structure with airborne LiDAR and the effects of platform altitude / N.R. Goodwin in Remote sensing of environment, vol 103 n° 2 (30/07/2006)
[article]
Titre : Assessment of forest structure with airborne LiDAR and the effects of platform altitude Type de document : Article/Communication Auteurs : N.R. Goodwin, Auteur ; Nicholas C. Coops, Auteur ; Darius S. Culvenor, Auteur Année de publication : 2006 Article en page(s) : pp 140 - 152 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] altitude du capteur
[Termes IGN] analyse comparative
[Termes IGN] angle de visée
[Termes IGN] Australie
[Termes IGN] canopée
[Termes IGN] distribution spatiale
[Termes IGN] données lidar
[Termes IGN] empreinte
[Termes IGN] Eucalyptus (genre)
[Termes IGN] forêt
[Termes IGN] houppier
[Termes IGN] impulsion laser
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] sylviculture
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Airborne scanning LiDAR is a spatial technology increasingly used for forestry and environmental applications. However, the accuracy and coverage of LiDAR observations is highly dependent on both the extrinsic specifications of the LiDAR survey as well as the intrinsic effects such as the underlying forest structure. Extrinsic parameters which are set as part of the LiDAR survey include platform altitude, scan angle (half max. angle off nadir), and beam cross sectional diameter at the reflecting surface (referred to as footprint size). In this paper we investigate the effect of a number of these extrinsic parameters, including three different platform altitudes (1000, 2000, and 3000 m), two scan angles at 1000 m (10° and 15° half max. angle off nadir), and three footprint sizes (0.2, 0.4, and 0.6 m). The comparison was undertaken in eucalypt forests at three sites, varying in vegetation structure and topography within the Wedding Bells State Forest, Coffs Harbour, Australia. Results at the plot scale (40 * 90 m areas) indicate that tree heights computed from the 1000 m LiDAR data set (10° half max. angle off nadir) are well correlated with maximum plot heights (difference 0.75, p Numéro de notice : A2006-320 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.03.003 En ligne : https://doi.org/10.1016/j.rse.2006.03.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28044
in Remote sensing of environment > vol 103 n° 2 (30/07/2006) . - pp 140 - 152[article]Tree cover and height estimation in the Fennoscandian tundra-taiga transition zone using multiangular MISR data / J. Heiskanen in Remote sensing of environment, vol 103 n° 1 (15 July 2006)
[article]
Titre : Tree cover and height estimation in the Fennoscandian tundra-taiga transition zone using multiangular MISR data Type de document : Article/Communication Auteurs : J. Heiskanen, Auteur Année de publication : 2006 Article en page(s) : pp 97 - 114 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] arbre (flore)
[Termes IGN] classification par réseau neuronal
[Termes IGN] détection de changement
[Termes IGN] Finlande
[Termes IGN] forêt boréale
[Termes IGN] image Terra-MISR
[Termes IGN] taïga
[Termes IGN] toundraRésumé : (Auteur) The tundra–taiga transition zone stretches around the northern hemisphere separating boreal forest to the south from treeless tundra to the north. Tree cover and height are important variables to characterize this vegetation transition. Accurate continuous fields of tree cover and height would enable the delineation of the forest extent according to different criterion and provide useful data for change detection of this climatically sensitive ecotone. This study examined if multiangular remote sensing data has potential to improve the accuracy of the tree cover and height estimates in relation to nadir-view data. The satellite data consisted of Multi-angle Imaging SpectroRadiometer (MISR) data at 275 m and 1.1 km resolutions. The study area was located in the Fennoscandian tundra–taiga transition zone, in northernmost Finland. The continuous fields of tree cover and height were estimated using neural networks, which were trained and assessed by high-resolution biotope inventory data. The spectral–angular data together produced lower estimation errors than single band nadir, multispectral nadir or single band multiangular data alone. RMSE of the tree cover estimates reduced from 7.8% (relative RMSE 67.4%) to 6.5% (56.1%) at 275 m resolution, and from 5.4% (49.2%) to 4.1% (36.9%) at 1.1 km resolution, when multispectral nadir data were used together with multiangular data. RMSE of the tree height estimates reduced from 2.3 m (44.3%) to 2.0 m (37.6%) and from 1.8 m (35.4%) to 1.3 m (25.4%), respectively. The largest estimation errors occurred in mires and in areas of dense shrub cover, but the use of multiangular data also reduced estimation errors in these areas. The results suggest that directional information has potential to improve the tree cover and height estimates, and hence the accuracy of the land cover change detection in the tundra–taiga transition zone. Copyright Elsevier Numéro de notice : A2006-285 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.03.015 En ligne : https://doi.org/10.1016/j.rse.2006.03.015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28012
in Remote sensing of environment > vol 103 n° 1 (15 July 2006) . - pp 97 - 114[article]Incorporating domain knowledge and spatial relationships into land cover classifications: a rule-based approach / A.E. Daniels in International Journal of Remote Sensing IJRS, vol 27 n°12-13-14 (July 2006)PermalinkLa ressource en Douglas : 15 ans d'évolution (1990 à 2004) / Fabrice Barlet ; Jean-Louis Ferron in Douglas infos, n° 13 (juin 2006)PermalinkBase cation cycling in a pristine watershed of the Canadian boreal forest / Louis Duchesne in Biogeochemistry, vol 78 n° 2 (April 2006)PermalinkPractical photogrammetric procedures for large-scale forest inventories / Paul-André Gagnon (29/03/2006)PermalinkCorrections for cluster-plot slop / Harry T. Valentine in Forest science, vol 52 n° 1 (February 2006)PermalinkAn empirical investigation of cross-sensor relationships of NDVI and red/near-infrared reflectance using EO-1 Hyperion data / T. Miura in Remote sensing of environment, vol 100 n° 2 (30 January 2006)PermalinkApports de la télédétection et des SIG à la définition de la sensibilité des sols à l'érosion et au suivi de l'occupation du sol sur l'ile d'Anjouan / A. Amir (2006)PermalinkLa forêt / Marc Galochet (2006)PermalinkLes indicateurs de gestion durable des forêts françaises [édition 2005] / Inventaire forestier national (1958 - 2011) (2006)PermalinkRENECOFOR. Effets de l'ozone sur la végétation, concentrations d'ozone (2000-2002) et symptômes d'ozone sur la végétation forestière (2001-2003) / Réseau national de suivi à long terme des écosystèmes forestiers (2006)Permalink