The role of population origin and microenvironment in seedling emergence and early survival in Mediterranean maritime pine (Pinus pinaster Aiton).

Détails

Ressource 1Télécharger: BIB_8DC4FE28D6A8.P001.pdf (944.39 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_8DC4FE28D6A8
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The role of population origin and microenvironment in seedling emergence and early survival in Mediterranean maritime pine (Pinus pinaster Aiton).
Périodique
PLoS One
Auteur(s)
Vizcaíno-Palomar N., Revuelta-Eugercios B., Zavala M.A., Alía R., González-Martínez S.C.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2014
Volume
9
Numéro
10
Pages
e109132
Langue
anglais
Résumé
Understanding tree recruitment is needed to forecast future forest distribution. Many studies have reported the relevant ecological factors that affect recruitment success in trees, but the potential for genetic-based differences in recruitment has often been neglected. In this study, we established a semi-natural reciprocal sowing experiment to test for local adaptation and microenvironment effects (evaluated here by canopy cover) in the emergence and early survival of maritime pine (Pinus pinaster Aiton), an emblematic Mediterranean forest tree. A novel application of molecular markers was also developed to test for family selection and, thus, for potential genetic change over generations. Overall, we did not find evidence to support local adaptation at the recruitment stage in our semi-natural experiment. Moreover, only weak family selection (if any) was found, suggesting that in stressful environments with low survival, stochastic processes and among-year climate variability may drive recruitment. Nevertheless, our study revealed that, at early stages of recruitment, microenvironments may favor the population with the best adapted life strategy, irrespectively of its (local or non-local) origin. We also found that emergence time is a key factor for seedling survival in stressful Mediterranean environments. Our study highlights the complexity of the factors influencing the early stages of establishment of maritime pine and provides insights into possible management actions aimed at environmental change impact mitigation. In particular, we found that the high stochasticity of the recruitment process in stressful environments and the differences in population-specific adaptive strategies may difficult assisted migration schemes.
Pubmed
Web of science
Open Access
Oui
Création de la notice
05/01/2015 10:54
Dernière modification de la notice
08/05/2019 21:50
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