Studies on lichen-dominated systems. II. The growth pattern of Cladonia alpestris and Cladonia rangiferina
Random samples of Cladonia alpestris show a strong correlation of podetial length, podetial diameter, and internode length, with soil moisture. The level of soil moisture is effectively an integration of net radiation and thus also reflects drying rates of the lichen canopy and the relative metaboli...
| Published in: | Canadian Journal of Botany |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1971
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/b71-196 http://www.nrcresearchpress.com/doi/pdf/10.1139/b71-196 |
| Summary: | Random samples of Cladonia alpestris show a strong correlation of podetial length, podetial diameter, and internode length, with soil moisture. The level of soil moisture is effectively an integration of net radiation and thus also reflects drying rates of the lichen canopy and the relative metabolic activity of the lichen. The existence of a large-scale mosaic pattern of 'drying rates' is demonstrated by traditional pattern analysis. The interactions of all pattern scales in Cladonia alpestris, C. rangiferina, Ledum groenlandicum, and lichen depth are examined by covariance analysis and interpreted in terms of water relations of the lichen. Experimental evidence is presented of the relative magnitude of evaporation gradients in open and closed spruce–lichen woodland. |
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