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Variables related to nitrogen deposition improve defoliation models for European forests / Marco Ferretti in Annals of Forest Science, vol 72 n° 7 (October 2015)  

Public [article]  inAnnals of Forest Science > vol 72 n° 7 (October 2015) . - pp 897 - 907 Titre : Variables related to nitrogen deposition improve defoliation models for European forests Type de document : Article/Communication Auteurs : Marco Ferretti, Auteur ; Marco Calderis, Auteur ; Aldo Marchetto, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 897 - 907 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] azote [Termes IGN] défoliation [Termes IGN] espèce végétale [Termes IGN] Europe (géographie physique) [Termes IGN] Fagus (genre) [Termes IGN] forêt [Termes IGN] impact sur l'environnement [Termes IGN] Picea abies [Termes IGN] Pinus sylvestris [Termes IGN] placette d'échantillonnage [Termes IGN] pollution atmosphérique [Termes IGN] surveillance de la végétation Résumé : (auteur) Key message : Atmospheric deposition of nitrogen compounds and soil and foliar variables related to N deposition resulted important factors accounting for the variability of defoliation in European forest plots. Context : Nitrogen (N) deposition has increased in the northern hemisphere because of anthropogenic-related emission of N compounds. Increased N availability may have an adverse impact on forest sustainability. Aims : This study aims to test the importance of throughfall N (Nthr) deposition in explaining the variability of the frequency of trees with defoliation >25 % (F 25), an indicator of forest condition. Methods : A pan-European data set (71 plots) with enhanced quality control was considered. The additive effect of Nthr-related predictors (identified conceptually and by rank correlation) in explaining F 25 was investigated by partial least square regression in comparison with a reference model based on site, stand, management and climate data. Reported damage to foliage, Nthr deposition, foliar N ratios and mineral top-soil variables were added stepwise to the reference model. Results : N-related variables improved defoliation models. Higher Nthr deposition led to higher F 25 for beech and Norway spruce, while the effect was opposite for Scots pine. Higher foliar N ratios led to higher F 25 for all species. Conclusion : Nthr deposition, damage to foliage, foliar N/P, N/Ca, N/Mg, N/K, top-soil pH, C/N and exchangeable base cation resulted important factors (although with possible diverse effect) in explaining the variability of F 25 among plots. Numéro de notice : A2015-718 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-014-0445-6 Date de publication en ligne : 01/10/2015 En ligne : https://doi.org/10.1007/s13595-014-0445-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78364 [article]