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Tree species identity mediates mechanisms of top soil carbon sequestration in a Norway spruce and European beech mixed forest / Enrique Andivia in Annals of Forest Science, vol 73 n° 2 (June 2016)  

Public [article]  inAnnals of Forest Science > vol 73 n° 2 (June 2016) . - pp 437- 447 Titre : Tree species identity mediates mechanisms of top soil carbon sequestration in a Norway spruce and European beech mixed forest Type de document : Article/Communication Auteurs : Enrique Andivia, Auteur ; Victor Rolo, Auteur ; Mathieu Jonard, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 437- 447 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Fagus sylvatica [Termes IGN] géostatistique [Termes IGN] Norvège [Termes IGN] Picea abies [Termes IGN] puits de carbone [Termes IGN] sol forestier [Termes IGN] teneur en carbone [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Key message: Combined effects of litterfall and root turnover significantly increase topsoil carbon stocks in Norway spruce and European beech mixed forests, indicating local complementarity effects mediated by tree species mixtures. Context: The establishment of mixed stands by intermingling individuals of European beech and Norway spruce is an ongoing trend in adaptive forest management strategies. However, our understanding of the potential of these strategies to promote C sequestration remains limited. Aims: This study aims to assess the effect of species composition on SOC stock in a mixed forest of Norway spruce and European beech. Methods: We studied C stocks in the uppermost soil layers in two stands dominated either by Norway spruce or European beech and in a mixture of both species. We evaluated the effect of litterfall and root turnover on soil organic carbon (SOC) stocks and its spatial distribution by combining structural equation models and geostatistical techniques. Results: C stocks in the forest floor were highest in Norway spruce, whereas in the mineral soil, the highest values were in the mixed stand. The proportion of Norway spruce litterfall was positively related to C stock in the forest floor across stands. Root turnover was positively related to C stock in the mineral soil of the mixed stand. Conclusion: Our results confirm a contrasting role of root turnover and litterfall between soil layers in the studied stands, suggesting that tree species composition can mediate the spatial distribution of SOC stocks in mixed forests. Numéro de notice : A2016-354 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-015-0536-z Date de publication en ligne : 14/01/2016 En ligne : https://doi.org/10.1007/s13595-015-0536-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81065 [article]

Non-invasive forest litter characterization using full-wave inversion of microwave radar data / Frédéric André in IEEE Transactions on geoscience and remote sensing, vol 53 n° 2 (February 2015)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 53 n° 2 (February 2015) . - pp 828 - 840 Titre : Non-invasive forest litter characterization using full-wave inversion of microwave radar data Type de document : Article/Communication Auteurs : Frédéric André, Auteur ; Mathieu Jonard, Auteur ; Sébastien Lambot, Auteur Année de publication : 2015 Article en page(s) : pp 828 - 840 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] caractérisation [Termes IGN] déchet organique [Termes IGN] Fagus (genre) [Termes IGN] forêt [Termes IGN] forme d'onde pleine [Termes IGN] humidité du sol [Termes IGN] image radar [Termes IGN] litière [Termes IGN] radar pénétrant GPR [Termes IGN] rétrodiffusion [Termes IGN] sol forestier [Termes IGN] télédétection en hyperfréquence Résumé : (Auteur) Litter is acknowledged to affect microwave remote sensing data over forests, and accurate quantification of litter radiative properties is essential for proper retrieval of forest soil water content and forest canopy biophysical characteristics from satellite or airborne sensors. Furthermore, detailed characterization of forest soil organic horizons is of paramount importance for ecological studies and for carbon cycle and global changerelated studies. Ultrawideband ground-penetrating radar (GPR) data acquired above beech forest litter were used to analyze the effects of litter on the backscattering and investigate the ability of GPR to quantitatively characterize the properties of the forest floor. Radar measurements were performed over different litter configurations (i.e., single layers of recently fallen litter (OL) or of fragmented litter (OF), and combined OL-OF layers) and thicknesses. Radar data were processed through full-wave inversion. Over the considered frequency range (0.8-4.0 GHz), attenuation of the radar signal increased as both frequency and litter thickness increase, due to scattering and dielectric losses. These effects were accounted for in the radar model through frequency dependence of litter apparent electrical conductivity. Good agreement (RMSE = 9.5 × 10-3 m) was observed between estimated and measured litter thicknesses. Radar data inversions provided reliable estimates of litter electromagnetic properties, with relative dielectric permittivity values around 1.2 and 3.9 for OL and OF litters, respectively, and corresponding values of 0.032 and 0.080 Sm-1 for litter apparent electrical conductivity at 4.0 GHz. These results show great promise for the use of GPR for noninvasive characterization of forest litter. Numéro de notice : A2015-102 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2014.2328776 En ligne : https://doi.org/10.1109/TGRS.2014.2328776 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75620 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-2015021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Temporal trends in the foliar nutritional status of the French, Walloon and Luxembourg broad-leaved plots of forest monitoring / Mathieu Jonard in Annals of Forest Science, Vol 66 n° 4 (June 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 4 (June 2009) . - n° 412 Titre : Temporal trends in the foliar nutritional status of the French, Walloon and Luxembourg broad-leaved plots of forest monitoring Titre original : Évolution du statut nutritionnel foliaire des placettes de feuillus des réseaux français, wallon et luxembourgeois de suivi des forêts Type de document : Article/Communication Auteurs : Mathieu Jonard, Auteur ; Frédéric André, Auteur ; Etienne Dambrine, Auteur ; Quentin Ponette, Auteur ; Erwin Ulrich, Auteur Année de publication : 2009 Article en page(s) : n° 412 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] diagnostic foliaire [Termes IGN] écologie forestière [Termes IGN] Fagus sylvatica [Termes IGN] France (administrative) [Termes IGN] Luxembourg [Termes IGN] phosphore [Termes IGN] Quercus pedunculata [Termes IGN] Quercus sessiliflora [Termes IGN] Wallonie (Belgique) [Vedettes matières IGN] Sylviculture Résumé : (auteur) Two decades after the launching of the monitoring program of forest ecosystems in Europe (ICP forests), a unique data set is now available regarding the foliar nutritional status of the main broad-leaved species growing in much-diversified sites (soil, climate). This study focuses on the foliar concentration time series (1993 to 2005) of the French (RENECOFOR), Walloon and Luxemburg broad-leaved plots. The aim is to show long-term trends while taking the inter-plot and inter-annual variability into account. Two kinds of statistical processing were used to analyze the data on foliar chemistry: principal component analysis (PCAs) and linear mixed models. In general, the main temporal trends reveal a decrease in the foliar P concentration and a decrease in the foliar Ca concentration, except for European beech on acid soils. These temporal patterns confirm the trends previously observed and could be explained by the joint actions of several processes that influence tree nutrition in the long term: tree age, N and S deposition, harvesting and climate. Numéro de notice : A2009-700 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009014 Date de publication en ligne : 06/05/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/04/f08249/f08249.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72246 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000405	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt