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Université de Provence - Aix-Marseille I Hyper Articles en Ligne |
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Université de Provence - Aix-Marseille I Hyper Articles en Ligne |
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| HAL : halsde-00439248, version 1 |
| DOI : 10.1007/s00468-009-0326-z |
| Fiche détaillée |  Récupérer au format |
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| Trees - Structure and Function 23, 4 (2009) 843-853 |
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| Response of Pinus sylvestris L. to recent climatic events in the French Mediterranean region |
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| Ali Thabeet 1, 2Michel Vennetier 2 |
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| (2009) |
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| Exceptional climatic events from 2003 to 2005 (scorching heat and drought) affected the whole of the vegetation in the French Mediterranean region and in particular the Scots pine (Pinus sylvestris L.), one of the most important forest tree species in this area. To understand its response to these extreme conditions, we investigated its radial growth, branch length growth, architectural development and reproduction for the period 1995–2005, and linked these variables to climatic parameters. We used four plots situated in southeastern France and presenting different levels of site quality and potential forest productivity. The results show that: (1) the climatic episode 2003–2005 was highly detrimental to the growth (bole and branches), crown development, and cone production but favored the production of male flowers; (2) these variables depend on climatic factors of both the current and previous years; (3) the 2003 scorching heat impact was strong but was mainly apparent from 2004; it was part of a 6-year-long unfavorable cycle beginning in 2000, characterized by high minimum and maximum temperatures and very dry springs; (4) in spite of a significant effect of site quality, the Scots pine's response to extreme climatic conditions was homogeneous in the French Mediterranean area; and (5) the stress induced by poor site conditions generally resulted in the same consequences for tree growth, architecture, and reproduction as in unfavorable climatic conditions. |
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| 1 : | Institut Méditerranéen d'Ecologie et de Paléoécologie (IMEP) |
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CNRS : UMR6116 – Université Paul Cézanne - Aix-Marseille III – Université de Provence - Aix-Marseille I – Université d'Avignon – Institut de recherche pour le développement [IRD] : UMR193 |
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| 2 : | CEMAGREF |
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CEMAGREF |
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| 3 : | BotAnique et BioinforMatique de l'Architecture des Plantes (AMAP) |
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Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] : UMR51 – CNRS : UMR5120 – Institut de recherche pour le développement [IRD] – Institut national de la recherche agronomique (INRA) : UR0931 – Université Montpellier II - Sciences et techniques |
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| domaine | : | Sciences de l'environnement/Milieux et Changements globaux |
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| Pinus sylvestris L – Scorching heat – Drought – Growth – Reproduction – French Mediterranean region |
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| halsde-00439248, version 1 | |
| http://hal-sde.archives-ouvertes.fr/halsde-00439248 | |
| oai:hal-sde.archives-ouvertes.fr:halsde-00439248 | |
| Contributeur : Yannick Brohard | |
| Soumis le : Lundi 7 Décembre 2009, 10:06:44 | |
| Dernière modification le : Lundi 7 Décembre 2009, 10:06:44 | |
