TAILIEUCHUNG - Báo cáo lâm nghiệp: "Can we reconstruct deer browsing history and how? Lessons from Gaultheria shallon Pursh"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Can we reconstruct deer browsing history and how? Lessons from Gaultheria shallon Pursh" | Ann. For. Sci. 62 2005 153-162 INRA EDP Sciences 2005 DOI forest 2005007 153 Original article Can we reconstruct deer browsing history and how Lessons from Gaultheria shallon Pursh Bruno VILAa Frédéric GUIBALa Franck TORREa Jean-Louis MARTINb a Institut Méditerranéen d Écologie et de Paléoécologie IMEP CNRS UMR 6116 Faculté des Sciences et Techniques de Saint-Jérôme 13397 Marseille Cedex 20 France b Centre d Écologie Fonctionnelle et Évolutive CNRS UMR 5175 1919 Route de Mende 34293 Montpellier Cedex 5 France Received 5 October 2003 accepted 15 March 2004 Abstract - We identified and analysed browsing signatures left by Sitka black-tailed deer Odocoileus hemionus sitkensis on Salal Gaultheria shallon to reconstruct deer browsing history. Radial growth analyses showed negative abrupt growth changes on islands with deer probably linked to defoliation. Deer browsing pressure was best assessed by the incidence of morphological changes caused by browsing in section form lobes pith form pith position or the presence of decaying wood and by changes in stem age structures. Salal stems were twice older 30 years on islands with deer than on islands without deer 16 years . On islands with deer deficit of stems in the youngest age classes suggested that deer impact has been strong on these shrubs for at least 20 years in the northern sites and for about 10 years in the southern ones. deer browsing history negative abrupt growth change morphological characteristics age structures Gaultheria shallon Pursh Résumé - Est-il possible de reconstituer l histoire de l abroutissement et comment Ce que nous apprend Gaultheria shallon Pursh. Nous avons identifié et analysé les signatures relatives à l abroutissement du cerf à queue noire Odocoileus hemionus sitkensis sur le salal Gaultheria shallon et utilisé celles-ci pour reconstituer son histoire. L analyse de la croissance radiale a révélé des décroissances brutales probablement liées à des défoliations. La pression et l .

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