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Matti Nuorteva (email)

Hakkuiden vaikutuksesta kaarnakuoriaisten esiintymiseen eräällä metsäalueella Etelä-Hämeessä

Nuorteva M. (1956). Hakkuiden vaikutuksesta kaarnakuoriaisten esiintymiseen eräällä metsäalueella Etelä-Hämeessä. Acta Forestalia Fennica vol. 65 no. 4 article id 7467. https://doi.org/10.14214/aff.7467

English title: Effect of fellings on bark beetle population in a forest area in Southern Finland

Abstract

Bark beetle populations live usually in a balance in natural forests, and outbreaks occur seldom. The populations have been found to increase in managed forests. Fellings affect the structure of the forests, which influence the living conditions of the insects, and produce material for reproduction. In this study the occurrence of bark beetles was studied in a forest area in Etelä-Häme in Southern Finland using line plot survey.

The forests in the area were Norway spruce (Picea abies L. Karst.) dominated. Over third of the 140 sample plots studied were in forests which had never been cut or it was over ten years to the last logging. Bark beetles of 26 different species were found in 66 of the sample plots. The most common species was six-toothed spruce bark beetle (Pityogenes chalcographus L.), which was due to the abundance of growth material suitable for the species in the area. New species in the area were common double-eyed spruce bark beetle (Polygraphus polygraphus L.), Pityophthorus micrographus L., and Dryocetes-beetle (either Dryocetes autographus or D. hectographus). The fellings increased the occurrence of beetles. The amount and quality of logging residue affected the abundance of the insects.

The PDF includes a summary in German.

Original keywords
hakkuut; kuusi; metsänhoito; hyönteistuhot; kaarnakuoriaiset

English keywords
forest management; bark beetles; Norway spruce; Picea abies; fellings; insect damage

Published in 1956

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Available at https://doi.org/10.14214/aff.7467 | Download PDF

Creative Commons License CC BY-SA 4.0

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