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Auteur Richard Michalet |
Documents disponibles écrits par cet auteur (6)
Affiner la rechercheAcer negundo invasion along a successional gradient: Early direct facilitation by native pioneers and late indirect facilitation by conspecifics / Patrick Saccone in New Phytologist, 187 (3) (2010)
Titre : Acer negundo invasion along a successional gradient: Early direct facilitation by native pioneers and late indirect facilitation by conspecifics Type de document : Électronique Auteurs : Patrick Saccone (1976-) ; Jean-Philippe Pages ; Jacky Girel ; Jean-Jacques Brun ; Richard Michalet Année de publication : 2010 Article en page(s) : 13 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Acer negundo L., 1753 Lien pérenne : DOI : 10.1111/j.1469-8137.2010.03289.x / HAL : hal-02667702
Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142781
in New Phytologist > 187 (3) (2010) . - 13 p.Saccone, Patrick (1976-), Pages, Jean-Philippe, Girel, Jacky, Brun, Jean-Jacques, Michalet, Richard 2010 Acer negundo invasion along a successional gradient: Early direct facilitation by native pioneers and late indirect facilitation by conspecifics. New Phytologist, 187(3): 13 p..Documents numériques
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Article (2010)URL
Titre : Les groupements à hautes herbes de l'étage subalpin des Monts Doré (Massif central français) Type de document : Imprimé Auteurs : Richard Michalet ; Thierry Philippe Année de publication : 1985 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Groupements végétaux, phytosociologie
[CBNPMP-Thématique] Inventaire des milieux, cartographies, relevés phyto-sociologiques
[CBNPMP-Thématique] Landes, fourrés et formation herbeuse naturelle et semi-naturelle
[CBNPMP-Thématique] Pelouses alpines et subalpines
[CBNPMP-Géographique] Monts dore
[CBNPMP-Géographique] Massif Central
[CBNPMP-Syntaxonomique] Festucion eskiae
[CBNPMP-Syntaxonomique] Calamagrostion
[CBNPMP-Syntaxonomique] Ligustico mutellinae-Luzulion desvauxiiPermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=84964
in Colloques phytosociologiques > XII (1983-1984)Michalet, Richard, Philippe, Thierry 1985 Les groupements à hautes herbes de l'étage subalpin des Monts Doré (Massif central français). Colloques phytosociologiques, XII.Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité R2996B 8050 Revue Bureaux Natura 2000 Consultable R2996 8050 Revue Centre de documentation Bibliothèque Consultable
Titre : Invasive Acer negundo outperforms native species in non-limiting resource environments due to its higher phenotypic plasticity Type de document : Électronique Auteurs : Annabel J. Porté ; Laurent Jean Lamarque (1983-) ; Christopher Lortie ; Richard Michalet ; Sylvain Delzon (1977-) Année de publication : 2011 Article en page(s) : 28 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Acer negundo L. Résumé : Background
To identify the determinants of invasiveness, comparisons of traits of invasive and native species are commonly performed. Invasiveness is generally linked to higher values of reproductive, physiological and growth-related traits of the invasives relative to the natives in the introduced range. Phenotypic plasticity of these traits has also been cited to increase the success of invasive species but has been little studied in invasive tree species. In a greenhouse experiment, we compared ecophysiological traits between an invasive species to Europe, Acer negundo, and early- and late-successional co-occurring native species, under different light, nutrient availability and disturbance regimes. We also compared species of the same species groups in situ, in riparian forests.
Results
Under non-limiting resources, A. negundo seedlings showed higher growth rates than the native species. However, A. negundo displayed equivalent or lower photosynthetic capacities and nitrogen content per unit leaf area compared to the native species; these findings were observed both on the seedlings in the greenhouse experiment and on adult trees in situ. These physiological traits were mostly conservative along the different light, nutrient and disturbance environments. Overall, under non-limiting light and nutrient conditions, specific leaf area and total leaf area of A. negundo were substantially larger. The invasive species presented a higher plasticity in allocation to foliage and therefore in growth with increasing nutrient and light availability relative to the native species.
Conclusions
The higher level of plasticity of the invasive species in foliage allocation in response to light and nutrient availability induced a better growth in non-limiting resource environments. These results give us more elements on the invasiveness of A. negundo and suggest that such behaviour could explain the ability of A. negundo to outperform native tree species, contributes to its spread in European resource-rich riparian forests and impedes its establishment under closed-canopy hardwood forests.Lien pérenne : DOI : 10.1186/1472-6785-11-28 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142542
in BMC Ecology > 11 (2011) . - 28 p.Porté, Annabel J., Lamarque, Laurent Jean (1983-), Lortie, Christopher, Michalet, Richard, Delzon, Sylvain (1977-) 2011 Invasive Acer negundo outperforms native species in non-limiting resource environments due to its higher phenotypic plasticity. BMC Ecology, 11: 28 p..Documents numériques
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article (2011)Adobe Acrobat PDF
Titre : Une quantification de la confidentialité relative en climat méditerranéen : application du système de Gams (1932) au Maroc septentrional Type de document : Imprimé Auteurs : Richard Michalet Année de publication : 1994 Article en page(s) : 237-246 Langues : Français (fre) Note de contenu : Actes du colloque "Ecologie et biogéographie alpines" de septembre 1990 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=138179
in Revue valdôtaine d'histoire naturelle > 48 (suppl.) (1994) . - 237-246Michalet, Richard 1994 Une quantification de la confidentialité relative en climat méditerranéen : application du système de Gams (1932) au Maroc septentrional. Revue valdôtaine d'histoire naturelle, 48(suppl.): 237-246.
Titre : Quantifying phenological plasticity to temperature in two temperate tree species Type de document : Électronique Auteurs : Yann Vitasse (1981-) ; Caroline C Bresson ; Antoine Kremer (1951-) ; Richard Michalet ; Sylvain Delzon (1977-) Année de publication : 2010 Article en page(s) : 10.1111/j.1365-2435.2010.01748.x Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Phénologie
[CBNPMP-Thématique] Rôle de la températur en physiologie végétaleRésumé :
1. Phenotypic plasticity allows large shifts in the timing of phenology within one single generation and drives phenotypic variability under environmental changes, thus it will enhance the inherent adaptive capacities of plants against future changes of climate.
2. Using five common gardens set along an altitudinal gradient (100–1600 m asl.), we experimentally examined the phenotypic plasticity of leaf phenology in response to temperature increase for two temperate tree species (Fagus sylvatica and Quercus petraea). We used seedlings from three populations of each species inhabiting different altitudes (400, 800 and 1200 m asl.). Leaf unfolding in spring and leaf senescence in autumn were monitored on seedlings for 2 years.
3. Overall, a high phenological plasticity was found for both species. The reaction norms of leaf unfolding date to temperature linearly accelerated for both species with an average shift of −5·7 days per degree increase. Timing of leaf senescence exhibited hyperbolic trends for beech due to earlier senescence at the lowest elevation garden and no or slight trends for oak. There was no difference in the magnitude of phenological plasticity among populations from different elevations. For both species, the growing season length increased to reach maximum values at about 10–13 °C of annual temperature according to the population.
4. Since the magnitude of phenological plasticity is high for all the tested populations, they are likely to respond immediately to temperature variations in terms of leaf phenology. Consequently the mid- to high-elevation populations are likely to experience a longer growing season with climate warming. The results suggest that climate warming could lengthen the growing season of all populations over the altitudinal gradient, although the low-elevation populations, especially of beech, may experience accelerated senescence and shorter growing season due to drought and other climate changes associated with warming.
Lien pérenne : DOI : 10.1111/j.1365-2435.2010.01748.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143436
in Functional Ecology > (2010) . - 10.1111/j.1365-2435.2010.01748.xVitasse, Yann (1981-), Bresson, Caroline C, Kremer, Antoine (1951-), Michalet, Richard, Delzon, Sylvain (1977-) 2010 Quantifying phenological plasticity to temperature in two temperate tree species. Functional Ecology: 10.1111/j.1365-2435.2010.01748.x.Documents numériques
Article (2010)URLLe rôle de la facilitation pour la biodiversité dans les environnements contraints / Richard Michalet (2006)
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