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Auteur Heike Kawaletz
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Back to the roots : how do seedlings of native tree species react to the competition by exotic species ? / Heike Kawaletz (2014)
est un tiré à part de 71 - 2014 (Annals of Forest Science)
Titre : Back to the roots : how do seedlings of native tree species react to the competition by exotic species ? Type de document : Tiré à part de revue Auteurs : Heike Kawaletz ; Inga Mölder ; Peter Annighöfer ; André Terwei ; Stefan Zerbe ; Christian Ammer Année de publication : 2014 Importance : 337-347 Langues : Anglais (eng) Catégories : [Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Prunus serotina Ehrh., 1788 Robinia pseudoacacia L., 1753 Résumé : - Context Identifying the traits of exotic species may explain their invasiveness and help control the negative impacts of these species on native ecosystems. In this study, we investigated root competition as an important driver for the competitiveness of two exotic tree species in the seedling stage.
- Aims In a pot experiment, carried out in Central Europe, we studied the effect of root competition of two exotic tree species (Prunus serotina Ehrh. and Robinia pseudoacacia L.) on biomass allocation of two native ones (Quercus robur L. and Carpinus betulus L.).
- Methods Seedlings of these species were exposed to intra and interspecific mixtures with and without the effect of root competition. For this, belowground plastic partitions were installed in the pots.
- Results Competition intensity in the pots increased over time, irrespective of mixture type. However, this increase was much higher for the native species if mixed with the exotic species compared to monocultures or inter-native mixtures. In addition to ontogeny, competition affected biomass allocation patterns. Under root competition by the exotic species, the native species preferentially allocated their biomass to the roots. A higher allocation to the roots was mainly achieved at the expense of leaf and branch biomass.
- Conclusion Root competition of P. serotina and R. pseudoacacia may be a reason for the lack of Q. robur and C. betulus in the seedling stage in natural environments where all four species occur.
Lien pérenne : DOI : 10.1007/s13595-013-0347-zKawaletz, H., Mölder, I., Annighöfer, P., Terwei, A., Zerbe, S., Ammer, C. 2014. Back to the roots : how do seedlings of native tree species react to the competition by exotic species ? Annals of Forest Science, 71 : 337-347.
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