Document


Title

The post-burning responses of bark beetles to prescribed burning treatments
Document Type: Book Chapter
Author(s): David J. Ganz; Donald L. Dahlsten; Patrick J. Shea
Editor(s): Philip N. Omi; Linda A. Joyce
Publication Year: 2002

Cataloging Information

Keyword(s):
  • bark beetles
  • Dendroctonus valens
  • fire-insect interactions
  • Ips spp.
  • Lassen Volcanic National Park
  • tree mortality
Region(s):
Record Maintained By:
Record Last Modified: March 25, 2016
FRAMES Record Number: 12347

Description

Ecologists and fire scientists have recommended reintroducing fire in fire-dependent ecosystems to achieve the twin goals of restoring pre-settlement forest conditions and reducing catastrophic fire risk (McKelvey 1996, Parsons 1995). Early work by forest entomologists (Miller 1927, Miller 1960; Rasmussen et al. 1996, Salman 1934) established a direct relationship between fire injury and subsequent insect attack in burned-over areas. Initial concern has centered on the primary tree killers Dendroctonus spp. and Scolytus ventralis LeConte. This research is also finding that Dendroctonus valens and Ips pini are causing tree mortality with both fall and spring prescribed burns. Post-burning bark beetle induced mortality can be quite significant as demonstrated by two case studies presented here from Lassen Volcanic National Park and Spooner Summit, Lake Tahoe Basin Management Unit. From these two sites, inferences are made on the effect of seasonality for predisposing trees to particular bark beetles. In comparing these two populations, there was no significant difference in the mean number of trees killed by insects in each seasonal window. As case studies, not enough replicates existed to merit a more rigorous analysis. As such, management implications of post-burning bark beetle response are discussed given the information available on fire-insect interactions during these two seasonal windows.

Online Link(s):
Link to this document (144 KB; pdf)
Citation:
Ganz, David J.; Dahlsten, Donald L.; Shea, Patrick J. 2002. The post-burning responses of bark beetles to prescribed burning treatments. In: Omi, P. N.; Joyce, L. A., eds. Fire, Fuel Treatments, and Ecological Restoration: Conference Proceedings, 2002 Apr. 16-18. Proceedings RMRS-P-29. Fort Collins, CO: USDA Forest Service, Rocky Mountain Research Station. 143-158 p.