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The length growth rate, biomass and production of Cladonia arbuscula and C. rangiferina in a raised bog in southern Finland

HARRI VASANDER
Annales Botanici Fennici
Vol. 18, No. 3 (1981), pp. 237-243
Stable URL: http://www.jstor.org/stable/23725238
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The length growth rate, biomass and production of Cladonia arbuscula and C. rangiferina in a raised bog in southern Finland
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Abstract

The length growth rates, production and biomass of two reindeer lichens, Cladonia arbuscula (Wallr.) Rabenh., and Cladonia rangiferina (L.) Wigg., were measured in the raised bog Laaviosuo, Lammi, southern Finland. The cover, biomass and production of C. rangiferina were higher than those of C. arbuscula in all the habitats studied (high hummocks, low hummocks, upper hollows). When the proportions of all the different habitats were considered in the calculations, the combined biomass of the two lichens in Laaviosuo was estimated at 19.1 g m-2 and their total mean annual production at 2.8 g m-2. When the hollows were excluded from the calculations the corresponding values were 23.1 g m-2 and 3.4 g m-2. The linear growth rate (measured by dividing the length of the living podetium by the number of internodes in it) was 5.9 ± 0.1 mm a year (x ± S.E.) for C. rangiferina, with a total variation of 3.9-7.7 mm. For C. arbuscula the corresponding values were 6.0 ± 0.1 mm a year and 4.6-7.5 mm. These values are of the same magnitude or possibly a little higher than those obtained in earlier studies.

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