Anatomic anomalies in annual tree-rings of Austrocedrus chilensis (D. Don) Pic.-Serm. et Bizzarri in its northern distribution range


  • Moisés Rojas-Badilla Universidad Austral de Chile, Valdivia, Chile
  • Claudio Álvarez Universidad Austral de Chile, Valdivia, Chile
  • Gonzalo Velásquez-Álvarez Universidad Austral de Chile, Valdivia, Chile
  • Martín Hadad Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, IANIGLA, Argentina
  • Carlos Le Quesne Universidad Austral de Chile, Valdivia, Chile
  • Duncan A. Christie Universidad Austral de Chile, Valdivia, Chile


wood anatomy, absent rings, frost rings, intra-annual bands, dendrochronology


Tree-ring anatomical anomalies have received little attention in southern South American trees, however they can contain valuable intra-annual environmental information. This study addressed for the first time the three most frequent tree- ring anomalies recorded in the northern and oldest known Austrocedrus chilensis forest in central Chile (32-35°S). Three anatomic anomalies described were: partially absent rings, intra-annual bands and frost rings. Partially absent rings resulted from cambial inactivity during a complete growing period and require dendrochronological tools to be detected. Intra- annual bands are consequence of the abundance-shortage of environmental resources during the growing season and can be detected by examining the undefined late-wood boundaries. Frost rings, are caused by extreme low temperatures and are characterized by collapsed cells in the tree-ring growth. Results indicate that the northern most population exhibited the highest rate of absent rings, while the occurrence of intra-annual bands seems to be rather minor in the study area. Finally, frost rings are registered mainly in the younger trees in all three studied sites. These results suggest the potential for future spatio-temporal studies that examine the frequency of these anatomical anomalies in A. chilensis chronologies along its wide geographical distribution. This will complement the current environmental information recorded by its growth rates.


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How to Cite

Rojas-Badilla, M.; Álvarez, C.; Velásquez-Álvarez, G.; Hadad, M.; Le Quesne, C.; Christie, D. A. Anatomic Anomalies in Annual Tree-Rings of Austrocedrus Chilensis (D. Don) Pic.-Serm. Et Bizzarri in Its Northern Distribution Range. Gayana Bot. 2017, 74, 269-281.