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Risto Sarvas

Havaintoja kasvillisuuden kehityksestä Pohjois-Suomen kuloalueilla

Sarvas R. (1937). Havaintoja kasvillisuuden kehityksestä Pohjois-Suomen kuloalueilla. Silva Fennica no. 44 article id 4524. https://doi.org/10.14214/sf.a9069

English title: Observations on development of vegetation in burned areas in Northern Finland.

Abstract

The aim of the study was to follow development of vegetation in dry upland forest sites after forest fire. The sample sites were situated in the counties of Muonio, Kolari, Sodankylä, Pelkosenniemi, Savukoski, Kemijärvi and Salla, in the northernmost Finland.
The growth of plant communities can arise either from the vegetation and seeds that survived the fire, or from seeds that spread from the surrounding areas. The development of vegetation in the burned areas was unexpectedly independent of the surrounding areas, which indicates that role of the seeds from the outside of the burned ares is small. The occurence of different species of lichens, moss, scale moss and vascular plants in the burned areas are described in detail. The development of vegetation was strongly dependent on the forest site type. The thin humus layer of Cladina site type burns usually evenly, and also the vegetation develops more evenly than in the more fresh site types. Vegetation typical for burned areas was fully developed within 10-15 years, and after 25 years it began to resemble the vegetation of Cladina site type forests. The ground vegetation of Calluna type burned area was more patchy. It developed quicker than in Cladina type. Absense of lichens made it seem more fertile than is usual for Calluna type. The humus layer of Empetrum-Myrtillus site type burned unevenly, and if the area was lightly burned, the vegetation recovered quickly. The vegetation was often patchy.
The PDF includes a summary in German.

Original keywords
kasvillisuus; kuloala; metsäpalo; metsätyyppi; Pohjois-Suomi; sukkessio

English keywords
vegetation; forest fire; forest site type; Northern Finland; succession; dry upland forest site

Published in 1937

Available at https://doi.org/10.14214/sf.a9069 | Download PDF

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