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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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Two new montane grassland communities from the SE Alps (N Slovenia) / Igor Dakskobler in Hacquetia, vol 15 n° 1 (June 2016)
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Titre : Two new montane grassland communities from the SE Alps (N Slovenia) Type de document : Article/Communication Auteurs : Igor Dakskobler, Auteur ; Andrej Seliškar, Auteur Année de publication : 2016 Article en page(s) : pp 31 - 48 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Alpes
[Termes IGN] Fagus (genre)
[Termes IGN] phytosociologie
[Termes IGN] Slovénie
[Termes IGN] unité phytosociologique
[Vedettes matières IGN] Ecologie forestièreRésumé : (auteur) On very steep dolomite slopes in the western foothills of the Kamnik Alps (Ravni hrib, Javorov vrh, Zaplata, Kriška gora) and southwestern Karavanke Mountains (Dobrča) we conducted a phytosociological study into montane grasslands (former hay meadows, partly pastures) where Gladiolus palustris, a species of European conservation concern, also occasionally occurs. They were compared with similar montane grasslands (former hay meadows) on sunny slopes of the Stol ridge above Breginj in the southwestern foothills of the Julian Alps. Based on this comparison we described three new syntaxa: Centaureo julici-Laserpitietum sileris gladioletosum palustris, Festuco amethystinae-Seslerietum calcariae and Pediculari julici-Bromopsietum transsilvanicae. Both new associations are classified into the alliance Caricion austroalpinae and treated as a long-term successional stage in the belt of altimontane beech forests from the association Ranunculo platanifolii-Fagetum. Numéro de notice : A2016-942 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1515/hacq-2016-0008 En ligne : https://doi.org/10.1515/hacq-2016-0008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83420
in Hacquetia > vol 15 n° 1 (June 2016) . - pp 31 - 48[article]Variations in the natural density of European oak wood affect thermal degradation during thermal modification / Joël Hamada in Annals of Forest Science, vol 73 n° 2 (June 2016)
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Titre : Variations in the natural density of European oak wood affect thermal degradation during thermal modification Type de document : Article/Communication Auteurs : Joël Hamada, Auteur ; Anélie Pétrissans, Auteur ; Frédéric Mothe, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 277 - 286 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bois
[Termes IGN] densité du bois
[Termes IGN] effet thermique
[Termes IGN] industrie forestière
[Termes IGN] Quercus (genre)
[Termes IGN] sylviculture
[Termes IGN] tomographie
[Vedettes matières IGN] ForesterieRésumé : (auteur) Key message : Thermogravimetric analysis, performed on small samples of earlywood (EW) or latewood (LW), indicated that earlywood is more susceptible to thermal degradation than latewood. These results suggest a direct relationship between wood density (which depends on the EW/LW ratio and indirectly on silviculture) and the response of wood during thermo-modification processes.
Context: One of the main difficulties in developing thermo-modified wood products at an industrial scale lies in the difficulty of obtaining consistent products with a stable quality (durability, dimensional stability, color). This may be due either to the thermal treatment process itself or to inter- or intra-specific heterogeneity of wood properties.
Aims: We investigated the effect of the natural variability of oak wood, particularly in density, on the degree of thermo-degradation during thermal treatments.
Methods: X-ray computed tomography was used to assess the effect of initial wood density of oak boards on their thermo-degradation. Intra-ring wood density was estimated using thermogravimetric analysis and micro-densitometry.
Results: X-ray CT did not allow establishment of a clear correlation between initial wood density and mass loss due to thermo-degradation, while thermogravimetric analysis, performed separately on earlywood and latewood samples, revealed a larger susceptibility to thermal degradation of the less dense earlywood samples compared to more dense latewood samples
Conclusion: Initial wood density, which is directly controlled by the earlywood/latewood ratio modulated by silvicultural practices, directly influences thermo-degradation during thermal treatment. Initial wood density therefore appears to be a potential parameter influencing industrial thermal treatment processes.Numéro de notice : A2016-349 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-015-0499-0 Date de publication en ligne : 16/07/2015 En ligne : https://doi.org/10.1007/s13595-015-0499-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81060
in Annals of Forest Science > vol 73 n° 2 (June 2016) . - pp 277 - 286[article]Wavelet analysis of low-frequency variability in oak tree-ring chronologies from east Central Europe / Asok K. Sen in Open geosciences, vol 8 n° 1 (January - July 2016)
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Titre : Wavelet analysis of low-frequency variability in oak tree-ring chronologies from east Central Europe Type de document : Article/Communication Auteurs : Asok K. Sen, Auteur ; Zoltan Kern, Auteur Année de publication : 2016 Article en page(s) : pp 478 - 483 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] analyse diachronique
[Termes IGN] dendrochronologie
[Termes IGN] Europe centrale
[Termes IGN] ondelette
[Termes IGN] précipitation
[Termes IGN] Quercus (genre)
[Termes IGN] série temporelle
[Termes IGN] variabilitéRésumé : (auteur) This study investigates the low-frequency (interannual and longer period) variability in three hydroclimatic records from east Central Europe. Two of these records consist of climate proxies derived from oak-tree rings in Bakta forest, and Balaton Highlands in Hungary, for the time interval 1783-2003. The third record consists of homogenized instrumental precipitation data from Budapest, Hungary, from 1842 to 2003. Using wavelet analysis, the three time series are analyzed and compared with one another. It is found that all three time series exhibit strong interannual variability at the 2-4 years timescales, and these variations occur intermittently throughout the length of each record. Significant variability is also observed in all the records at decadal timescales, but these variations persist for only two to three cycles. Wavelet coherence among the various time series is used to explore their time-varying correlation. The results reveal significant coherence at the 2-4 years band. At these timescales, the climatic variations are correlated to the tree-ring signal over different time intervals with changing phase. Increased (decreased) contribution of large-scale stratiform precipitation offers a potential explanation for enhanced (faded) coherence at the interannual timescale. Strong coherence was also observed occasionally at decadal timescales, however these coherences did not appear uniformly. These results reinforce the earlier assertion that neither the strength nor the rank of the similarity of the local hydroclimate signals is stable throughout the past two centuries. Numéro de notice : A2016--070 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1515/geo-2016-0044 En ligne : https://doi.org/10.1515/geo-2016-0044 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84416
in Open geosciences > vol 8 n° 1 (January - July 2016) . - pp 478 - 483[article]
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Titre : Ash to ashes? Type de document : Article/Communication Auteurs : David Roderick, Auteur Année de publication : 2016 Article en page(s) : pp 52 - 53 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] application web
[Termes IGN] Chalara fraxinea
[Termes IGN] Fraxinus excelsior
[Termes IGN] maladie parasitaire
[Termes IGN] parasite (biologie)Résumé : (éditeur) Ash dieback, which threatens to decimate Britain’s second most common tree, is not the only threat to native species from invasive pests and diseases. David Roderick reports on how the Forestry Commission is fighting back with its Tree Alert web app. Numéro de notice : A2016-199 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80634
in GEO: Geoconnexion international > vol 15 n° 5 (May 2016) . - pp 52 - 53[article]Investigating the possible impact of atmospheric CO2 increase on Araucaria araucana wood density / Paulina E. Pinto in European Journal of Forest Research, vol 135 n° 2 (April 2016)
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Titre : Investigating the possible impact of atmospheric CO2 increase on Araucaria araucana wood density Type de document : Article/Communication Auteurs : Paulina E. Pinto, Auteur ; Jean-Daniel Bontemps , Auteur ; Jean-Claude Pierrat, Auteur ; Tony Franceschini, Auteur ; Pierre Gelhaye, Auteur ; Jean-Claude Gégout, Auteur ; Jean-Michel Leban
, Auteur
Année de publication : 2016 Article en page(s) : pp 389 - 401 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Environnement
[Termes IGN] Araucaria araucana
[Termes IGN] Chili
[Termes IGN] Cordillère des Andes
[Termes IGN] dendrométrie
[Termes IGN] densité du bois
[Termes IGN] forêt tempérée
[Termes IGN] puits de carboneRésumé : (auteur) Our aim was to investigate the possible enhancing role of long-term atmospheric CO2 increase on wood density as an essential component of biomass sequestration. We therefore assessed the long-term evolution of wood density over pre-industrial and contemporary periods, in a regional context free of management practices, atmospheric deposition and with restricted climatic change. Dominant trees of Araucaria araucana were sampled in 37 stands distributed throughout its natural distribution over temperate forests of the Chilean Andes Cordillera. Mean ring density (MRD) at 1.30 m was measured by X-ray micro-densitometry. A third-century MRD chronology was built after MRD standardisation by the effects of cambial age and radial growth, simultaneously estimated from a statistical model from rings of the pre-industrial period (1700–1850) to avoid any temporal bias. The age-alone standardised MRD chronology showed restricted fluctuations ranging between 2.0 and 3.2 % over the last three centuries. Multi-decennial fluctuations between ring width and MRD were found qualitatively synchronous and opposed. Accordingly, MRD fluctuations were removed with the age and growth standardisation, highlighting the absence of a historical wood density trend at constant ring size over the whole period. Over the most recent decades however, a slight increase in density was identified, with loss of synchronisation to radial growth. The absence of a long-term signal in wood density of A. araucana, in a context of restricted anthropogenic influence, differs markedly from reports of significant decreases in the Northern Hemisphere. We conclude as part of the analysis done that until now, increasing atmospheric CO2 unlikely would have an impact in wood density. Numéro de notice : A2016--085 Affiliation des auteurs : LIF+Ext (2012-2019) Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s10342-016-0942-2 Date de publication en ligne : 03/03/2016 En ligne : http://doi.org/10.1007/s10342-016-0942-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84570
in European Journal of Forest Research > vol 135 n° 2 (April 2016) . - pp 389 - 401[article]Extreme events and climate change: the post-disaster dynamics of forest fires and forest storms in Sweden / Rolf Lidskog in Scandinavian journal of forest research, vol 31 n° 2 (March 2016)
PermalinkThe dynamics of northern red oak (Quercus rubra L.) in managed forests of central Poland / Damian Głowacki in Forest research papers, vol 77 n° 1 (March 2016)
PermalinkQuantification of overnight movement of birch (Betula pendula) branches and foliage with short interval terrestrial laser scanning / Eetu Puttonen in Frontiers in plant science, vol 7 (29 February 2016)
PermalinkImproved salient feature-based approach for automatically separating photosynthetic and nonphotosynthetic components within terrestrial Lidar point cloud data of forest canopies / Lixia Ma in IEEE Transactions on geoscience and remote sensing, vol 54 n° 2 (February 2016)
PermalinkOptimising the spatial resolution of WorldView-2 pan-sharpened imagery for predicting levels of Gonipterus scutellatus defoliation in KwaZulu-Natal, South Africa / Romano Lottering in ISPRS Journal of photogrammetry and remote sensing, vol 112 (February 2016)
PermalinkAbove-ground and below-ground competition between the willow Salix caprea and its understorey / Ondřej Mudrák in Journal of vegetation science, vol 27 n° 1 (January 2016)
PermalinkApplication des techniques de photogrammétrie par drone à la caractérisation des ressources forestières / Jonathan Lisein (2016)
PermalinkDistribution patterns of forest species along an Atlantic-Mediterranean environmental gradient: an approach from forest inventory data / A. Olthoff in Forestry, an international journal of forest research, vol 89 n° 1 (January 2016)
PermalinkEstimating over- and understorey canopy density of temperate mixed stands by airborne LiDAR data / Hooman Latifi in Forestry, an international journal of forest research, vol 89 n° 1 (January 2016)
PermalinkLa forêt en chiffres et en cartes / Institut national de l'information géographique et forestière (2012 -) (2016)
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