Jonsell, Mats
- Department of Ecology, Swedish University of Agricultural Sciences
Research article2011Peer reviewedOpen access
Jonsell, Mats; Hansson, Jesper
Stumps from clear cuts are increasingly used for bioenergy. Extracting this wood will reduce the habitat available for saproxylic (wood-living) organisms. As little is known about the species assemblages that will be affected, we investigated the diversity of saproxylic beetles in stumps on clear-felled sites and as a reference, we compared it with the diversity in downed logs. Stumps and logs of aspen (Populus tremolo L.), birch (Betula pubescens Ehrh. and B. verrucosa Ehrh.[syn. B. pendula Roth]), spruce (Picea abies (L.) Karst.) and pine (Pious sylvestris L.) were examined in clear cuts of two different ages: one summer old and 4-5 years old. The beetles were sampled by sieving bark (0.25 m(2)) peeled from the wood. The samples were taken in pairs of one log and one stump situated close together and of the same tree species, age since death and diameter. In total 3348 saproxylic beetles belonging to 124 species were found in 176 samples. The stumps had a similar number of species to the logs both as measured per sample and as an accumulated number. Exceptions were 4-5 years old wood of birch and pine where the number was significantly higher in the stumps. The number of red-listed species was also similar between stumps and logs. Species composition was more different between the stumps and logs of conifers than of deciduous trees. We conclude that clear-felled stumps have a diverse saproxylic insect fauna. This has to be taken into account if large scale extraction of logging stumps is implemented.
beetles; biodiversity; bioenergy; Coleoptera; logs; insects; stumps
Silva Fennica
2011, Volume: 45, number: 5, article number: 86Publisher: FINNISH SOC FOREST SCIENCEFINNISH FOREST RESEARCH
Forest Science
Renewable Bioenergy Research
Environmental Sciences related to Agriculture and Land-use
DOI: https://doi.org/10.14214/sf.86
https://res.slu.se/id/publ/58101