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Interactions between re and bark beetles in an old growth pine forest

Summary: Interactions between «re and bark beetles in
an old growth pine forest
Alyson E. Santoroa
, Mar§┬a J. Lombarderoa
Matthew P. Ayresa,*
, Jonathan J. Ruelb
Department of Biological Sciences, Dartmouth College, Hanover, NH 03755, USA
Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
Received 2 January 2000; accepted 12 March 2000
Management strategies for old growth pine forests have recently begun to include prescribed burns. Fire could in»uence
interactions between bark beetles and mature pine trees, but we cannot predict the effects because we know too little about the
numeric and functional responses of bark beetle populations to «re, and because we do not know how «re affects the oleoresin
defense system of pine trees. We estimated population abundance of Ips spp. (Coleoptera: Scolytidae), and the resin »ow of
mature red pines (Pinus resinosa), before and after a prescribed burn, inside and outside the burn, in an old growth forest at
Itasca State Park, Minnesota. Following a prescribed burn in April, the local abundance of Ips pini increased by two-fold
during May, decreased by a comparable amount during 6 weeks starting in mid-July, and was otherwise unchanged. The


Source: Ayres, Matthew.P. - Department of Biological Sciences, Dartmouth College


Collections: Environmental Sciences and Ecology