Frost ring distribution in Araucarua araucana trees from the xeric forests of Patagonia, Argentina

HADAD, MARTIN; AMOROSO, MARIANO MARTÍN; ROIG JUÑET, FIDEL ALEJANDRO

Concepción

Conferencia; IUFRO Landscape Ecology Conference. Sustaining Human and Forest in Changing Landscape: Forest, Society and Global Change.; 2012

IUFRO

Frost rings are defined as anatomically abnormal and ecophysiologically pathological structures. We studied the frost injuries in tree-rings of Araucaria araucana trees growing at the northern limit of its natural distribution. We recorded 121 frost injuries at two sites in the northern xeric distribution of A. Araucana woodlands. Frost rings at both sites were primarily restricted to the middle frost ring section of the rings. These results represent the first attempt to report and describe the occurrence of these events for this species and region. These proxy records represent important indicators of extreme temperature conditions.