Abstract

Better understanding of overwintering strategy in Ips typographus is crucial in planning of sanitation felling as hot spots recovery measure. Bark and needle litter are present as overwintering niches within the species. At the lowest elevation (500 m a. s. l.) in spruce stands 85 % of beetles overwinter under the bark. Overwintering behavior is elevation adaptable, and portion of beetles which overwinters under the bark of attacked trees increase with decreasing of elevation. The results suggest presence of high plasticity within the species which is well adaptable to changeable habitat and temperature conditions. High in the mountains sanitation felling need to be implemented early in autumn before beetles end the development, while at lower elevations a good result can be achieved with felling early in spring before the start of new generation. During the winter bark peels off the dense attacked tress very often and changes the beetle ratio between niches. This fact needs to be considered in planning of sanitation felling early in spring before fly period of I. typographus.

Keywords

bark beetles; overwintering niches; predators; ecological plasticity; temperature; felling

Published in

Sumarski List
2019, Volume: 143, number: 1-2, pages: 19-24
Publisher: CROATIAN FORESTRY SOC

SLU Authors

• Lindelöw, Åke

  • Department of Ecology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Zoology
Forest Science
Ecology


Publication identifier

DOI: https://doi.org/10.31298/sl.143.1-2.2

Permanent link to this page (URI)

https://res.slu.se/id/publ/99153