John Lundquist

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The objective of this paper is to present recommendations for fuels treatments in ponderosa pine forests in the Southwest, Colorado Front Range, and Black Hills of South Dakota. We have synthesized existing knowledge from the peer-reviewed literature and administrative studies and acquired local knowledge through a series of discussions with fuels treatment(More)
Increasingly more research has focused on characterizing diversity within forest pathogen populations using molecular markers but few studies have characterized features of the landscape that help create or maintain this diversity. Forest diseases commonly occur in patchy distributions across natural landscapes which can be re¯ected in the genetic(More)
Various disturbances such as disease and management practices causecanopy gaps that change patterns of forest stand structure. This study examinedthe usefulness of digital image analysis using aerial photos, FourierTranforms,and cluster analysis to investigate how different spatial statistics areaffected by spatial scale. The specific aims were to: 1)(More)
A method is described for predicting the spatial distribution of individual birds using presence data. The approach is demonstrated using a statistical habitat association model developed for resident and migratory birds on a 12 ha plot of ponderosa pine (Pinus ponderosa) heavily infested with southwestern ponderosa pine dwarf mistletoe (Arceuthobium(More)
Hayes, J.L.; Lundquist, J.E., comps. 2009. The Western Bark Beetle Research Group: a unique collaboration with Forest Health Protection—proceedings of a symposium at the 2007 Society of American Foresters conference. Gen. Tech. Rep. PNW-GTR-784. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 134 p. The(More)
Subalpine fir decline (SFD) has killed more trees in Colorado’s high elevation forests than any other insect or disease problem. The widespread nature of this disorder suggests that the cause involves climatic factors. We examined the influence of varying combinations of average annual temperature and precipitation on the incidence and distribution of SFD.(More)
Not all disease activity causes an impact. Not all impacts are negative. The aim of this study was to examine a method that could conceptually specify when impacts occur and that could quantify both negative and positive disease impacts. For this study, dwarf mistletoe ( Arceuthobium douglasi) of Douglas fir ( Pseudotsuga menziesii) in southwestern Oregon(More)
The association of skeletal anomalies and aggressive fibromatosis has been documented. Isolated bowing of the ulna is rare, yet its occurrence, particularly in conjunction with congenital dislocation of the radial head, has been documented. This article presents two cases of ulnar bowing in which the patients subsequently developed aggressive fibromatosis.(More)
P art of the diversity of a forest is the variety of agents that can kill trees. These agents differ in the nature, magnitude, and patterns of their impacts on forest resources. Diseases, insect pests, and other small-scale disturbances are commonly assessed on the basis of their impacts on timber production. Tree mortality usually means reduced volume of(More)
JUSTIFICATION: Armillaria root disease is associated with various forest tree declines in the Rocky Mountain Region and has been suggested to play a role in tree mortality that is usually attributed only to bark beetles. Armillaria has been documented as a major forest pest in the states surrounding Wyoming, yet an evaluation of the significance of this(More)