A New Lisianthus from Guatemala

Standley, Paul Carpenter; Steyermark, Julián A.

doi:10.2307/2482727

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2005

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“…peut atteindre de quatre a cinq cents ans (Tubbs & Houston, 1990 ;Standley, 2001 ). Le Hetre europeen (Fagus sylvatica L.), au contraire, est considere par Ia majeure partie des auteurs comme une espece qui n'a pas une duree de vie particulierement longue.…”

Section: Introductionunclassified

La hêtraie pluri-séculaire de la vallée Cervara (Parc national des Abruzzes, Italie)

Schirone¹,

Pedrotti

Spada³

et al. 2005

Acta Botanica Gallica

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Mots ctes : forilt ancienne -dendrochronologie -Hetre -longevite -conservation de Ia nature.Abstract.-The oldest beech forest of Europe was found in the Apennines. The stand is located in valle Cervara (Abruzzo national Park) and it covers about fifty hectares from 1 400 to 1 800 m a.s.l. The forest is characterized by a mosaic of patches in different phases of development from seedlings to senescent and dead trees. Some trees reach five hundred years, two fold the maximum age reported for the species. The dendrochronological analysis of the tree-ring series showed tree growth variations which occurred in the forest since the Little Ice Age (1600-1850). The reconstruction of the past climate is an important step to understand the role of human activities in the present climatic global change. This study will be also useful to define a model of forest management that take into consideration the natural cycle of beech forests.

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Section: Introductionunclassified