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Does recent fire activity impact fire-related traits of Pinus halepensis Mill. and Pinus sylvestris L. in the French Mediterranean area? / Bastien Romero in Annals of Forest Science [en ligne], vol 77 n° 4 (December 2020)  

Public [article]  inAnnals of Forest Science [en ligne] > vol 77 n° 4 (December 2020) . - n° 106 Titre : Does recent fire activity impact fire-related traits of Pinus halepensis Mill. and Pinus sylvestris L. in the French Mediterranean area? Type de document : Article/Communication Auteurs : Bastien Romero, Auteur ; Anne Ganteaume, Auteur Année de publication : 2020 Article en page(s) : n° 106 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] adaptation (biologie) [Termes descripteurs IGN] écosystème [Termes descripteurs IGN] forêt méditerranéenne [Termes descripteurs IGN] France (administrative) [Termes descripteurs IGN] fréquence [Termes descripteurs IGN] génétique forestière [Termes descripteurs IGN] incendie de forêt [Termes descripteurs IGN] ontogenèse [Termes descripteurs IGN] Pinus halepensis [Termes descripteurs IGN] Pinus sylvestris [Termes descripteurs IGN] résilience [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Key message: Climate change will induce a change in fire frequency in Mediterranean region and that could impact fire-adapted plant species. We showed that fire-related traits of some pine species are strongly related to other factors than fire but the recent fire history has nonetheless an impact on the variation of key traits for different fire adaptive strategies. Context: In fire-prone Mediterranean areas, climate change is expected to exacerbate the fire pressure on ecosystems, altering the current fire regime and threatening species if they cannot acclimate. Aims: Studying intraspecific variations of some fire-related traits in relation to variation in recent fire activity is thus an important step to better understand if this acclimation is possible. Methods: We measured structural (bark thickness, shoot bulk density, self-pruning, leaf surface to volume ratio) and functional (serotiny level for Pinus halepensis only) traits in two pines species (Pinus halepensis and Pinus sylvestris) commonly found in southeastern France and that present different fire-adaptive strategies (resilience vs resistance, respectively). Populations were sampled according to different fire frequency modalities (0 vs 1 to 2 fires) along a geographical gradient, measuring numerous environmental and plant characteristics to be used cofactors in the analyses. Results: As expected, trait variation was strongly linked to environmental and tree characteristics as well as to ontogeny overriding the effect of fire modalities, even though using integrative models with random effect. However, fire modalities had an impact on the variance of some key fire-related traits of Pinus halepensis. Conclusion: This study will help to anticipate the future response of these Mediterranean pine species and further underlines the importance of investigating chemical traits, flammability, and genetic variation of highly heritable traits, such as serotiny. Numéro de notice : A2020-722 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-020-01016-1 date de publication en ligne : 16/11/2020 En ligne : https://doi.org/10.1007/s13595-020-01016-1 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96320 [article]

Does ontogeny modulate irradiance-elicited plasticity of leaf traits in saplings of rain-forest tree species? A test with Dicorynia guianensis and Tachigali melinonii (Fabaceae, Caesalpinioideae) / Sabrina Coste in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 7 (October - November 2009) . - n° 709 Titre : Does ontogeny modulate irradiance-elicited plasticity of leaf traits in saplings of rain-forest tree species? A test with Dicorynia guianensis and Tachigali melinonii (Fabaceae, Caesalpinioideae) Titre original : L'ontogenèse module-t-elle la plasticité des traits foliaires induite par la lumière dans des semis d'arbres de forêt tropicale humide? Un test avec Dicorynia guianensis et Tachigali melinonii (Fabaceae, Caesalpinioideae) Type de document : Article/Communication Auteurs : Sabrina Coste, Auteur ; Jean-Christophe Roggy, Auteur ; Laurianne Garraud, Auteur ; Patrick Heuret, Auteur ; Eric Nicolini, Auteur ; Erwin Dreyer, Auteur Année de publication : 2009 Article en page(s) : n° 709 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] forêt tropicale [Termes descripteurs IGN] ontogenèse [Termes descripteurs IGN] photosynthèse Résumé : (Auteur) Irradiance elicits a large plasticity in leaf traits, but little is known about the modulation of this plasticity by ontogeny. Interactive effects of relative irradiance and ontogeny were assessed on leaf traits for two tropical rainforest tree species: Dicorynia guianensis Amshoff and Tachigali melinonii (Harms) Barneby (Fabaceae, Caesalpinioideae). Eleven morphological and physiological leaf traits, relative to photosynthetic performance, were measured on saplings at three different architectural development stages (ASD 1, 2 and 3) and used to derive composite traits like photosynthetic N-use efficiency. Measurements were made along a natural irradiance gradient. The effect of ASD was very visible and differed between the two species. For Dicorynia guianensis, only leaf mass-per-area (LMA) significantly increased with ASDs whereas for Tachigali melinonii, almost all traits were affected by ASD: LMA, leaf N content and photosynthetic capacity increased from ASD 1 to ASD 3. Photosynthetic N-use-efficiency was not affected by ASD in any species. Leaf traits were severely modulated by irradiance, whereas the degree of plasticity was very similar among ASDs. Only few interactions were detected between irradiance and ASD, for leaf thickness, carbon content, and the ratio Chl/N in T. melinonii and for photosynthetic capacity in D. guianensis. We conclude that ontogenic development and irradiance-elicited plasticity modulated leaf traits, with almost no interaction, i.e., the degree of irradiance-elicited plasticity was stable across development stages and independent of ontogeny in these two species, at least in the early stages of development assessed here. Numéro de notice : A2009-630 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009062 date de publication en ligne : 02/10/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/07/f09036/f09036.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72833 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000668	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches / Jose Climent in Annals of Forest Science, Vol 66 n° 4 (June 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 4 (June 2009) . - n° 407 Titre : Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches Titre original : Dégâts du gel sur des aiguilles primaires et secondaires chez différentes espèces de pins méditerranéens dans des niches écologiques contrastées Type de document : Article/Communication Auteurs : Jose Climent, Auteur ; Filipe Costa e Silva, Auteur ; Maria Regina Chambel, Auteur ; Marta Pardos, Auteur ; Maria Helena Almeida, Auteur Année de publication : 2009 Article en page(s) : n° 407 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] gelée [Termes descripteurs IGN] niche écologique [Termes descripteurs IGN] ontogenèse [Termes descripteurs IGN] Pinus (genre) [Termes descripteurs IGN] Pinus canariensis [Termes descripteurs IGN] Pinus halepensis [Termes descripteurs IGN] Pinus nigra [Termes descripteurs IGN] Pinus pinaster [Termes descripteurs IGN] Pinus pinea [Termes descripteurs IGN] Pinus radiata [Termes descripteurs IGN] Pinus sylvestris Résumé : (auteur) Pine seedlings show a marked ontogenetic difference between primary and secondary needles, the latter prevailing with a different timing among species. Using the electrolyte leakage method following an artificial freezing test, we aimed at (1) determining the differences in freezing tolerance between primary and secondary needles in eight pines of contrasting thermal habitats: P. canariensis, P. pinea, P. halepensis, P. brutia, P. pinaster, P. nigra, P. sylvestris and P. radiata, (2) evaluating the relation between freezing tolerance and sclerophylly and (3) relating freezing tolerance with the climate of origin. Primary needles were significantly more sensitive to freezing than secondary needles in Pinus halepensis, P. brutia, P. pinaster and P. nigra, whereas no differences were found in P. canariensis, P. pinea and P. radiata. LT50 was uncorrelated with needle sclerophylly but very highly correlated with the mean temperature of the coldest month at the seed source. Results support an adaptive role of secondary needles in the mountain Mediterranean pines P. nigra, P. pinaster and P. brutia, while the more complex responses in coastal Mediterranean pines can be interpreted in the light of seedling ontogeny and species’ ecological niches. Numéro de notice : A2009-655 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009016 date de publication en ligne : 06/05/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/04/f08338/f08338.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72240 [article]

Exemplaires (1)

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