Armstrong R.A. & Bradwell T.
(2015):
‘Growth rings’ in crustose lichens: Comparison with directly measured growth rates and implications for lichenometry -
Quaternary Geochronology,
28: 88-95
Some species of crustose lichens, such as Ochrolechia parella (L.) Massal., exhibit concentric marginal rings, which may represent an alternative technique of measuring growth rates and potentially, a new lichenometric dating method. To examine this hypothesis, the agreement and correlation between ring widths and directly measured annual radial growth rates (RaGR, mm a−1) were studied in 24 thalli of O. parella in north Wales, UK, using digital photography and image analysis. Variation in ring …
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