Present address: Forest Research Institute, Department of Forest Protection, Sekocin Stary, 05-090 Raszyn, Poland.
Saproxylic parasitoid (Hymenoptera, Ichneumonoidea) communities in managed boreal forest landscapes
Article first published online: 21 FEB 2010
© 2010 The Authors. Journal compilation © 2010 The Royal Entomological Society
Insect Conservation and Diversity
Volume 3, Issue 2, pages 114–123, May 2010
How to Cite
STENBACKA, F., HJÄLTÉN, J., HILSZCZAŃSKI, J., BALL, J. P., GIBB, H., JOHANSSON, T., PETTERSSON, R. B. and DANELL, K. (2010), Saproxylic parasitoid (Hymenoptera, Ichneumonoidea) communities in managed boreal forest landscapes. Insect Conservation and Diversity, 3: 114–123. doi: 10.1111/j.1752-4598.2010.00082.x
- Issue published online: 6 APR 2010
- Article first published online: 21 FEB 2010
- Accepted 11 January 2010 First published online 22 February 2010 Editor: Raphael K. Didham Associate editor: Donald Quicke
- Complementarity of sampling methods;
- dead wood;
- emergence trap;
- flight intercept trap;
- habitat requirements;
- parasitoid–host associations
Abstract. 1. Species of higher trophic levels are predicted to be more vulnerable to disturbances (e.g. by forestry) than their prey because of low population densities, extreme specialisation and reliance on intact trophic chains.
2. The aim of this study was to acquire some much-needed basic information on saproxylic parasitoids in boreal forest landscapes. To obtain reliable estimates of species richness, abundance, assemblage composition and host associations of saproxylic parasitoids in different stand types (clear-cuts, mature managed forests and old-growth reserves), we used two different methods (emergence traps and window traps).
3. Window traps caught more species and gave a better measure of the species pool in different stand types, while emergence traps were more suitable for detailed analyses concerning substrate requirements, hatching periods and to some extent host choice.
4. The general distribution pattern revealed no significant differences in species richness among stand types, but parasitoid assemblages were affected by forest successional stage. Idiobionts, dominated by Ontsira antica and Bracon obscurator, preferred clear-cuts over forested sites, while koinobionts, especially Cosmophorus regius, were more common in mature forests and reserves. We conclude that the stand types studied were complementary in assemblage composition, but that none held a complete assemblage of saproxylic parasitoids and we suggest that a range of successional stages be retained to help conserve the entire parasitoid community.