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Image number: 2072325

LES ECOSYSTEMES MEDITERRANEENS FACE AUX CHANGEMENTS CLIMATIQUES. Amelie Saunier (IMBE-CNRS inspecte un bac a litiere installe dans le sous-bois de la plateforme experimentale de l'O3HP. Ces bacs permettent de recueillir un echantillon des feuilles mortes tombant au sol, afin de les analyser. Plusieurs de ces bacs sont places dans chacune des modalites experimentales (zone d'exclusion de pluie, zone d'irrigation, zone temoin), afin de mesurer l'effet de la diminution des precipitations sur le cycle de la matiere au sein de la foret de chene pubescent. La plateforme experimentale de l'O3HP (Oak Observatory at Observatoire de Haute Provence) vise a simuler les changements climatiques prevus en région mediterranenne afin d'en mesurer les impacts sur la foret de chene pubescent, l'un des principaux ecosystemes forestiers mediterraneens. La plateforme se compose de passerelles instrumentees permettant d'acceder a plusieurs strates de la foret, d'un systeme d'exclusion de pluie (baches deroulantes) couvrant la moitie de la parcelle de foret (300m2) qui intercepte 30 à 40% des precipitations, et d'un reseau de capteurs fournissant des informations en temps reel sur les conditions meso et micro-climatiques.

© Thibaut Vergoz / Biosphoto

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