Periodicity of growth rings in Juniperus procera from Ethiopia inferred from crossdating and radiocarbon dating.

T. Wils, I. Robertson, Z. Eshetu, U. Sass-Klaassen, M. Koprowski

Research output: Contribution to journalArticleAcademicpeer-review

42 Citations (Scopus)

Abstract

African pencil cedar (Juniperus procera Hochst. ex Endlicher 1847) is a tropical, irregularly growing species that can produce annual growth rings in response to an annual cycle of wet and dry seasons. In this paper, we assess the periodicity of growth-ring formation for 13 stem discs from a site in Central-Northern Ethiopia by crossdating and radiocarbon dating. The crossdating process is described more transparently than usual to allow open discussion of the methodology employed. Although the ring-width series could be tentatively matched, radiocarbon dating revealed that the growth rings of the junipers from the studied site are neither annual nor represent a common periodicity. It was found that the trees are exceptionally sensitive and respond individually to the complex local climate. For future research, it is recommended to select more mesic sites with an unambiguously unimodal rainfall regime and to gain external evidence to support assumptions about the periodicity of growth-ring formation in Juniperus procera
Original languageEnglish
Pages (from-to)45-58
JournalDendrochronologia
Volume27
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • bomb c-14 data
  • tree-rings
  • pterocarpus-angolensis
  • brachystegia-spiciformis
  • age calibration
  • tropical trees
  • africa
  • dynamics
  • climate
  • dendrochronology

Fingerprint Dive into the research topics of 'Periodicity of growth rings in Juniperus procera from Ethiopia inferred from crossdating and radiocarbon dating.'. Together they form a unique fingerprint.

Cite this