Size variation of Rhizocarpon on moraine slopes in southern Norway

The Rhizocarpon green zone hypothesis states that maximum thallus diameters of the yellow species in this taxon are largest at the foot of the proximal slopes of moraine ridges. The hypothesis is tested by data from two glacial forelands: Storbreen in the Jotunheimen and Nigardsbreen in the Jostedal...

Full description

Saved in:
Bibliographic Details
Published in:Arctic and alpine research 1983-08, Vol.15 (3), p.295-305
Main Author: Haines Young R.H
Format: Article
Language:English
Subjects:
Alpine glaciers
Analysis of variance
Biological taxonomies
Data lines
Lichenometry
Lichens
Moraines
Observational research
Rhizocarpon
Statistical discrepancies
Thallus
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Rhizocarpon green zone hypothesis states that maximum thallus diameters of the yellow species in this taxon are largest at the foot of the proximal slopes of moraine ridges. The hypothesis is tested by data from two glacial forelands: Storbreen in the Jotunheimen and Nigardsbreen in the Jostedal, Norway. The results support the green zone hypothesis and suggest that the phenomenon is mainly due to the behavior of Rhizocarpon geographicum. It is generally presumed that the proximal slope of any one moraine is of a uniform age. Therefore, the existence of a zone where mean maximum thallus diameters are larger than elsewhere on the proximal slope is considered to have important implications for the use of this species group for lichenometric dating.
ISSN:0004-0851
2325-5153
DOI:10.1080/00040851.1983.12004356