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COMMUNITY ECOLOGY Richard W. Hofstetter James T. Cronin
 

Summary: COMMUNITY ECOLOGY
Richard W. Hofstetter James T. Cronin
Kier D. Klepzig John C. Moser Matthew P. Ayres
Antagonisms, mutualisms and commensalisms affect outbreak dynamics
of the southern pine beetle
Received: 6 May 2005 / Accepted: 4 November 2005 / Published online: 2 December 2005
Springer-Verlag 2005
Abstract Feedback from community interactions
involving mutualisms are a rarely explored mechanism
for generating complex population dynamics. We
examined the effects of two linked mutualisms on the
population dynamics of a beetle that exhibits outbreak
dynamics. One mutualism involves an obligate associa-
tion between the bark beetle, Dendroctonus frontalis and
two mycangial fungi. The second mutualism involves
Tarsonemus mites that are phoretic on D. frontalis
(``commensal''), and a blue-staining fungus, Ophiostoma
minus. The presence of O. minus reduces beetle larval
survival (``antagonistic'') by outcompeting beetle-mutu-
alistic fungi within trees yet supports mite populations

  

Source: Ayres, Matthew.P. - Department of Biological Sciences, Dartmouth College
Cronin, James T. - Department of Biological Sciences, Louisiana State University
Hofstetter, Richard W. - School of Forestry, Northern Arizona University

 

Collections: Biology and Medicine; Engineering; Environmental Sciences and Ecology