Centre de documentation
scientifique

Effects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe / Gaëlle Rouault in Annals of Forest Science, Vol 63 n° 6 (september 2006)  

Public [article]  inAnnals of Forest Science > Vol 63 n° 6 (september 2006) . - p. 613 - 624 Titre : Effects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe Titre original : Effet de la sécheresse et de la canicule de 2003 sur les populations d'insectes ravageurs forestiers en Europe centrale et occidentale Type de document : Article/Communication Auteurs : Gaëlle Rouault, Auteur ; Jean-Noël Candau, Auteur ; François Lieutier, Auteur ; Louis-Michel Nageleisen, Auteur ; Jean-Claude Martin, Auteur ; Nathalie Warzée, Auteur Année de publication : 2006 Article en page(s) : p. 613 - 624 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] dynamique de la végétation [Termes IGN] Europe centrale [Termes IGN] Europe occidentale [Termes IGN] insecte nuisible [Termes IGN] sécheresse [Termes IGN] stress hydrique [Vedettes matières IGN] Végétation et changement climatique Résumé : (Auteur) Although drought affects directly tree physiology and growth, the impact of secondary factors (insect pests, pathogens and fire) is often greater than the impact of the original stress and can lead to important tree mortality. In 2003, Western and Central Europe experienced a drought and heat waves that led to extensive forest damage. This paper reports on the impacts of drought and high temperatures on forest insect populations in the context of this exceptional event. Observations of changes in population levels of the main European forest insect pests during and after the drought are presented and discussed in the light of current knowledge and theories of interactions between drought and insects. We investigated the direct effects of drought on life history traits and indirect effects through physiological changes experienced by host trees. Forest pest insects were separated in 4 feeding guilds: woodborers, leaf-chewers, leaf-miners and leaf-suckers. The impact of water stress varied according to feeding guilds. Woodborers were positively influenced by prolonged water stress and the decline of host resistance. In contrast, defoliators profited better from the increased nitrogen in plant tissues linked to moderate or intermittent water stress. Field observations showed the importance of the soil water status in tree resistance against pest attacks. Thus, the 2003 drought confirmed observations from earlier droughts that, is case of bad choice of tree species in some plantations, site matching becomes a prominent and primary cause of the development of pest outbreaks. This exceptional drought may give us some indication of the impacts of extreme climatic events. However, observations of the performance at the individual level were not sufficient for predicting long-term insect population dynamics, which depends on complex interactions between biotic and abiotic factors. Numéro de notice : A2006-668 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2006044 Date de publication en ligne : 14/09/2006 En ligne : https://doi.org/10.1051/forest:2006044 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72725 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000644	PER	Revue	Nogent-sur-Vernisson	Archives périodiques	Exclu du prêt