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Age and epiphytic lichen diversity of the dwarf shrub Helianthemumoelandicum on the island of Öland, Sweden

Published online by Cambridge University Press:  06 August 2009

L. FRÖBERG ,
M. NIKLASSON ,
H. PALTTO ,
T. KNUTSSON  and
T. JOHANSSON
L. FRÖBERG
Affiliation:
Botanical Museum, Östra Vallgatan 18, SE-223-61 Lund, Sweden. Email: lars.froberg@botmus.lu.se
M. NIKLASSON
Affiliation:
Institution of Southern Swedish Forest research Centre, P. O. Box 49, SE-230 53, Alnarp, Sweden.
H. PALTTO
Affiliation:
Systems Biology Research Centre Skövde University, P. O. Box 408, SE-541 28 Skövde, Sweden. Department of Ecology, Swedish Agricultural University, Box 7044, SE-750 07 Uppsala, Sweden.
T. KNUTSSON
Affiliation:
Nedre Västerstad 111, SE-380 62 Mörbylånga, Sweden.
T. JOHANSSON
Affiliation:
County Administrator of Kalmar, SE-391 86 Kalmar, Sweden.
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Abstract

Lichen cover and diversity were analysed on the dwarf shrub Helianthemum oelandicum (L.) Dum.Cours. at one site in the calcareous grassland of the area known as the ‘Great Alvar’ on the Island of Öland, Sweden. The age of 22 phorophytes was determined by ring counting and varied from 8 to 41 years and was accurately predicted by the root diameter. A total of 18 lichen species was found, with a range between 0 and 13 species per phorophyte. The number of lichen species on living H. oelandicum were correlated with the phorophyte age. The number of lichen species and their coverage were greater on dead compared with living phorophytes. The species number was also higher on thin branches compared with thick branches and roots and some of the species showed preferences for dead phorophytes, and for thin branches. This study of lichen colonization and growth on dwarf shrubs in relation to phorophyte age is a new application of herbchronology.

Keywords

herbchronologyphorophyte agespecies richness
Type
Research Article
Information
The Lichenologist , Volume 41 , Issue 5 , September 2009 , pp. 537 - 545
Copyright
Copyright © British Lichen Society 2009

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