Title A review of lichen growth and applied lichenometry in southwest and southeast Greenland
Author Hansen, E.S.
Author Affil Hansen, E.S., University of Copenhagen, Natural History Museum of Denmark, Botanical Museum, Copenhagen, Denmark
Source Lichenometry in subpolar environments, edited by T. Bradwell. Geografiska Annaler. Series A: Physical Geography, 92(1), p.65-79, . Publisher: Wiley-Blackwell published on behalf of Svenska Saellskapet foer Antropologi och Geografi, Stockholm, Sweden. ISSN: 0435-3676
Publication Date Mar. 2010
Notes In English. Includes appendices. 44 refs. GeoRef Acc. No: 310339
Index Terms geochronology; glaciers; lichens; Greenland--South Greenland; Arctic region; case studies; field studies; glacial features; Greenland; growth rates; lichenometry; methods; moraines; relative age; South Greenland
Abstract This paper presents a critical review of previous lichenometric and lichen growth studies in southern parts of West and East Greenland. These studies include classic work from around Sondre Stromfjord, Sukkertoppen, Sermilik and Angmagssalik. Particular emphasis is placed on those studies examining the role played by climatic continentality on the growth rate of crustose lichens in Greenland. The latter part of the paper presents new data on lichen growth rates from Sermilik, between 2001 and 2006, in 22 different lichen species. Measurements show that different species grow at different rates and growth rates vary from site to site. In this study Rhizocarpon geographicum generally grows slowly (0.2 mm a-1) while other species such as Pseudephebe minuscula grow more rapidly (1.0 mm a-1) in the same environment. Comparison with other studies shows that taxa-specific growth rates are slightly greater in West than in East Greenland - probably as a result of the slightly more favourable climate and higher precipitation levels. It is suggested that recent climate change, most marked in southern Greenland, will probably result in changed growth curves (over time) for species such as Rhizocarpon geographicum. However, only more precise growth curves and lichenometric dating curves can demonstrate such a phenomenon. Abstract Copyright (2010), Swedish Society for Anthropology and Geography.
URL http://hdl.handle.net/10.1111/j.1468-0459.2010.00378.x
Publication Type journal article
Record ID 65007231