Bokhögstubbar i Klåveröds strövområde
utbredning, egenskaper och betydelse för rödlistade vedlevande skalbaggar
Lack of dead wood is the main cause of decaying or loss of populations for many
forest species. To increase the amount of dead wood is a prerequisite to maintain
biodiversity in forests of northern Europe. In summer 2006 the recreation area
Klåveröd, at Söderåsen in Skåne, Sweden, has been inventoried for high stumps
(snags) of beech, (Fagus sylvatica). The result of the inventory has been compared
with data of the real estate and forest management directories from the owner,
region Skåne. The results have also been matched with the results from an
inventory of saproxylic beetles in 2005, performed with windowtraps on selected
snags both in the area and the adjacent national park Söderåsen.
594 snags were found on 747 ha. 80% of the number of snags were found on
forestground, others on wetland or steep slopes. 30 % were situated in areas for
nature conservation; NS and NO, even though these areas only represented 9% of
the area. The number of snags were the same for the northern and southern part of
Klåveröd but less redlisted saproxylic beetles were found in the northern part and
there were less old decaying snags which could indicate a shorter period of snag
existence. The southern part of Klåveröd borders to Söderåsen national park
which could be the main factor of the gradient in redlisted species abundance.
Furthermore the snags in northern Klåveröd are separated from the southern parts
by a barrier of conifer stands of one kilometre width. The lack of continuity in
dead wood and the limited dispersal ability from known habitats is the primary
difference between the two parts of Klåveröd and also the gradient between
Klåveröd and the national park.