Short communication: Many missing rings in old Canary pines can be related with age, fires and traditional uses

  • Mar Génova Universidad Politécnica de Madrid. ETS de Ingeniería de Montes, Forestales y del Medio Natural. Dept. Sistemas y Recursos Naturales. 28040 Madrid
  • Carlos Santana Universidad de Las Palmas de Gran Canaria. Instituto Universitario de Análisis y Aplicaciones Textuales (IATEXT). 35002 Las Palmas de Gran Canaria
  • Begoña Martínez Universidad Politécnica de Madrid. ETS de Ingeniería de Montes, Forestales y del Medio Natural. Dept. Sistemas y Recursos Naturales. 28040 Madrid
Keywords: dendrochronology, Canary Islands, Spain, growth changes

Abstract

Aim and area of study: In the present paper we estimated the age of four monumental Pinus canariensis of Gran Canaria (Canary Islands, Spain) by means of tree-ring analysis. Many tree-ring series have been accurately studied and many missing rings have been determined.

Material and methods: The trees were dead and the samples analysed were big disks. We measured numerous radii and crossdated the individual tree-ring series, paying particular attention to the existence and location of missing rings. We have distinguished between missing outer rings (MORs) and missing inner rings (MIRs) and analysed the possible causes of both.

Main results: We determined an average of 8.8% total missing rings (MRs) for these long-lived trees, with a maximum of 96 MRs in a series of over 500. We have tried to establish a tree-ring chronology on Gran Canaria Island, also having the tree-ring series from Inagua site, but the long individual tree-ring series analysed do not crossdate between them.

Research highlights: We consider the Canary pine a species hard to conducting dendroecological studies, especially if the samples come from managed old trees, in which a large amount of known and potentially unknown missing rings can hampered dating. Even knowing the difficulties involved in dendrochronological analyses of P. canariensis, we can confirm that it is a long-lived species, which can grow to over 500 years, and some of whose growth changes could be associated with certain historical and ecological events.

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References

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Published
2017-10-20
How to Cite
Génova, M., Santana, C., & Martínez, B. (2017). Short communication: Many missing rings in old Canary pines can be related with age, fires and traditional uses. Forest Systems, 26(2), eSC02. https://doi.org/10.5424/fs/2017262-10253
Section
Short communications