TAILIEUCHUNG - Báo cáo lâm nghiệp: "Impact of summer drought on forest biodiversity: what do we know"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Impact of summer drought on forest biodiversity: what do we know? | Ann. For. Sci. 63 2006 645-652 INRA EDP Sciences 2006 DOI forest 2006041 645 Review Impact of summer drought on forest biodiversity what do we know Frédéric ARCHAUXa Volkmar WOLTERSb a Cemagref Domaine des Barres 45290 Nogent sur Vernisson France b Justus-Liebig-University of Giessen Heinrich-Buff-Ring 26-32 35392 Giessen Germany Received 14 October 2005 accepted 16 March 2006 Abstract - To date very few studies have assessed the impact of summer droughts on forest biodiversity and ecosystem functioning. Decreased ecosystem productivity and increased mortality are general consequences of drought on biodiversity. Competitive species species adapted to cold and wet conditions as well as species with low reproduction rates and or limited mobility seem the more affected. However species-specific effects are regulated by mechanisms allowing for resistance to drought. The short-term consequences of drought on biodiversity depend on species abilities to resist and to recover after drought and on competitive interactions between species. Although the abundance of many species generally decreases during drought some taxa may increase in number during drought or shortly after. The effects of recurrent droughts must be evaluated in the wider context of global climate and habitat change. Considering the predicted increase in drought frequency and intensity interdisciplinary research initiatives on this issue are needed urgently. drought impact biodiversity forests ecosystem functioning global change Résumé - Impact de la sécheresse estivale sur la biodiversité forestiere que savons-nous On connait mal les consequences des sécheresses sur la biodiversité et le fonctionnement des écosystèmes forestiers. La productivité des écosystèmes semble diminuer et s accompagne d une mortalité accrue. Les espèces compétitives liées à des habitats frais ou humides avec un faible taux de reproduction et ou une mobilité réduite semblent les plus sensibles à la sécheresse. La réponse .

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