Qualities and supply of suitable dead wood for Ceruchus chrysomelinus and its dispersal pattern in a translocated population
Ceruchus chrysomelinusSaproxylic beetleTranslocationDead woodDead wood qualitiesSuitable substrateSpecies conservationConservation biology
The wood-living beetle Ceruchus chrysomelinus is a rare species connected to natural
forests. In Sweden, it is red-listed as endangered (EN) and an action plan for its preservation
has been done by the Swedish Environmental Protection Agency. In this work I have
therefore investigated how a translocation of the species succeeded after 17 years. I aimed
to study the species dispersal biology, its substrate preferences and the supply of suitable
wood on this site. The study was performed during 2012 in Pansaruddens nature reserve
close to Uppsala in Sweden, which is a spruce dominated forest. In 1995 logs with dense
populations of C. chrysomelinus were translocated into two locations within this reserve.
Circular study plots were established with a radius of 75 m around the translocated logs in
both sites. All lying dead wood trunks ?10 cm in breast height within the study plots were
investigated. Generalized linear models showed that the presence of C. chrysomelinus
could be described by degree of decay, rot type (white/brown) and the size of the log. This
study also shows that the species had dispersed within the two areas, but only for very
short distances. Most findings were done