Ancient juniper trees growing on cliffs: toward a long Mediterranean tree-ring chronology - Archive ouverte HAL Access content directly
Journal Articles Dendrochronologia Year : 2016

Ancient juniper trees growing on cliffs: toward a long Mediterranean tree-ring chronology

Abstract

Juniperus phoenicea is a tree that can grow on vertical cliff faces in dry and warm Mediterranean climate conditions. These trees are adapted to extreme growing conditions where the main constraints are verticality, compact hard limestone, and low water supply. They respond to these constraints via various specific features and high longevity. The objective of this study is to confirm whether or not their tree-rings are annual in order to specify growth strategies and accurately date these trees. Trunk morphology, anatomical wood anomalies and radial growth were analyzed on 53 trees in the Ardeche canyon. Crossdating of the ring widths using traditional dendrochronological techniques was unsuccessful, so radiocarbon dating of tree pith was used to assess tree age, and wiggle-match dating was used to test for differences between number of rings counted and radiocarbon dates. Radiocarbon dates span the period 2520-685 BP. Minimal difference between radiocarbon dates and ring counts was apparently small missing rings occur, but not in large numbers. Tree-ring formation is annual and radial growth is low, which creates stunted old trees. Such old living trees are uncommon in the Mediterranean basin, especially at low elevation. They can provide long tree-ring chronologies back to 792-524 cal BC. Results from the radiocarbon dating indicate that accurate annual dating of these rings may be possible by cross-dating. J. phoenicea growing on cliffs offer a valuable model to better understand cliff population ecology and the functional responses of trees that can live in harsh environmental conditions. (C) 2016 Published by Elsevier GmbH.
Fichier principal
Vignette du fichier
Mathaux et al 2016.pdf (4.63 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-01444067 , version 1 (15-02-2022)

Identifiers

Cite

Coralie Mathaux, Jean-Paul Mandin, Christine Oberlin, Jean-Louis Édouard, Thierry Gauquelin, et al.. Ancient juniper trees growing on cliffs: toward a long Mediterranean tree-ring chronology. Dendrochronologia, 2016, 37, pp.79--88. ⟨10.1016/j.dendro.2015.12.005⟩. ⟨hal-01444067⟩
390 View
140 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More