Détail de l'auteur
Auteur Manuel Nicolas |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheBio 2 : biomasse et biodiversité forestières ; augmentation des l'utilisation de la biomasse forestière : implications pour la biodiversité et les ressources naturelles / Guy Landmann (2009)
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21021 8240 Rapport d'étude Centre de documentation Bibliothèque Consultable Documents numériques
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Document (2009)URLIncreasing spring temperatures favor oak seed production in temperate areas / Thomas Caignard in Scientific reports, (17 August 2017)
Titre : Increasing spring temperatures favor oak seed production in temperate areas Type de document : Numérique Auteurs : Thomas Caignard ; Antoine Kremer (1951-) ; Cyril Firmat ; Manuel Nicolas ; Samuel Venner ; Sylvain Delzon (1977-) Année de publication : 2017 Article en page(s) : 1-8 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Global change, écosystème, évolution
[CBNPMP-Thématique] Graines
[CBNPMP-Thématique] Reproduction végétative
[CBNPMP-Thématique] Système de reproductionMots-clés : Quercus L., 1753 Résumé : The changes in reproductive phenology (i.e. timing of flowering and fruiting) observed in recent decades demonstrate that tree reproduction has already been altered by climate change. However, understanding the impact of these changes in reproductive success and fitness remains a major challenge for ecologists. We describe here a previously unreported phenomenon: a significant increase in the reproductive effort (seed production) of temperate oaks with increasing spring temperature, observed over the last decade. In contrast, no relationship was found between seed production and precipitation. This sensitivity of seed production to temperature was confirmed by a “space-for-time” substitution based on elevation gradients. Our findings suggest that global warming may enhance oak reproductive effort in temperate ecosystems. Nevertheless, while fitness can be enhanced by higher levels of seed production, it also depends on the frequency and synchronization of mast seeding production, which may also be influenced by climate change. Identifiant : DOI : 10.1038/s41598-017-09172-7 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143285
in Scientific reports > (17 August 2017) . - 1-8Caignard, Thomas, Kremer, Antoine (1951-), Firmat, Cyril, Nicolas, Manuel, Venner, Samuel, Delzon, Sylvain (1977-) 2017 Increasing spring temperatures favor oak seed production in temperate areas. Scientific reports: 1-8.Documents numériques
Article (2017)URL
Titre : Invasion by the Alien Tree Prunus serotina Alters Ecosystem Functions in a Temperate Deciduous Forest Type de document : Numérique Auteurs : Rien Aerts (1958-) ; Michael Ewald ; Manuel Nicolas ; Jérôme Piat ; Sandra Skowronek ; Jonathan Lenoir ; Tarek Hattab ; Carol X. Garzón-López ; Hannes Feilhauer ; Sebastian Schmidtlein ; Duccio Rocchini ; Guillaume Decocq ; Ben Somers ; Ruben Van De Kerchove ; Karolien Denef ; Olivier Honnay Année de publication : 2017 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Prunus serotina Ehrh. Résumé : Alien invasive species can affect large areas, often with wide-ranging impacts on ecosystem structure, function, and services. Prunus serotina is a widespread invader of European temperate forests, where it tends to form homogeneous stands and limits recruitment of indigenous trees. We hypotesized that invasion by P. serotina would be reflected in the nutrient contents of the native species’ leaves and in the respiration of invaded plots as efficient resource uptake and changes in nutrient cycling by P. serotina probably underly its aggressive invasiveness. We combined data from 48 field plots in the forest of Compiègne, France, and data from an experiment using 96 microcosms derived from those field plots. We used general linear models to separate effects of invasion by P. serotina on heterotrophic soil and litter respiration rates and on canopy foliar nutrient content from effects of soil chemical properties, litter quantity, litter species composition, and tree species composition. In invaded stands, average respiration rates were 5.6% higher for soil (without litter) and 32% higher for soil and litter combined.Compared to indigenous tree species, P. serotina exhibited higher foliar N (+24.0%), foliar P (+50.7%), and lower foliar C:N (−22.4%) and N:P (−10.1%) ratios. P. serotina affected foliar nutrient contents of co-occuring indigenous tree species leading to decreased foliar N (−8.7 %) and increased C:N ratio (+9.5%) in Fagus sylvatica, decreased foliar N:P ratio in Carpinus betulus (−13.5%) and F. sylvatica (−11.8%), and increased foliar P in Pinus sylvestris (+12.3%) in invaded vs. uninvaded stands. Our results suggest that P. serotina is changing nitrogen, phosphorus, and carbon cycles to its own advantage, hereby increasing carbon turnover via labile litter, affecting the relative nutrient contents in the overstory leaves, and potentially altering the photosynthetic capacity of the long-lived indigenous broadleaved species. Uncontrolled invasion of European temperate forests by P. serotina may affect the climate change mitigation potential of these forests in the long term, through additive effects on local nutrient cycles. Identifiant : DOI : 10.3389/fpls.2017.00179 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=156056
in Frontiers in plant sience > 8 (2017)Aerts, Rien (1958-), Ewald, Michael, Nicolas, Manuel, Piat, Jérôme, Skowronek, Sandra, Lenoir, Jonathan, Hattab, Tarek, Garzón-López, Carol X., Feilhauer, Hannes, Schmidtlein, Sebastian, Rocchini, Duccio, Decocq, Guillaume, Somers, Ben, De Kerchove, Ruben Van, Denef, Karolien, Honnay, Olivier 2017 Invasion by the Alien Tree Prunus serotina Alters Ecosystem Functions in a Temperate Deciduous Forest. Frontiers in plant sience, 8.Documents numériques
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Article (2017)Adobe Acrobat PDF
