Keyword: dwarf mistletoe

How important are bole infections in spread of ponderosa pine dwarf mistletoe?

The relation between vigor of dwarf mistletoe (Arceuthobium vaginatum subsp. cryptopodum) bole infections and diameter of ponderosa pine was evaluated in several areas in Colorado. Infections which occur where the bole is over 5 inches in diameter seem to pose little threat to surrounding trees. In this study all such trees were over 7 inches d.b.h.

Bird dissemination of dwarf mistletoe on ponderosa pine in Colorado

Dwarf mistletoe [Arceuthobium vaginatum subsp. cryptopodum (Engelm.) Hawksworth and Wiens] distribution and the role of birds as vectors of the parasite were studied in a Colorado ponderosa pine (Pinus ponderosa Laws.) forest. Occurrence of the parasite at distances from a source greater than those attributable to explosive seed discharge was erratic and infrequent.

Spatial relationship of resident and migratory birds and canopy openings in diseased ponderosa pine forests

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 vasinatum subsp. Cryptopodum (Englemann) Hawksworth and Weins).

Dwarf mistletoes: Biology, pathology, and systematics

Arceuthobium (dwarf mistletoes), a well defined but morphologically reduced genus of the family Viscaceae, is parasitic on Pinaceae in the Old and New Worlds and on Cupressaceae in the Old World. Although conifer forests in many parts of the Northern Hemisphere are infested with dwarf mistletoes, those most commonly infested are in western North America and Mexico.

Historic range of variability for upland vegetation in the Medicine Bow National Forest, Wyoming

An approach for synthesizing the results of ecological research pertinent to land management is the analysis of the historic range of variability (HRV) for key ecosystem variables that are affected by management activities. This report provides an HRV analysis for the upland vegetation of the Medicine Bow National Forest in southeastern Wyoming.

Historic range of variability for upland vegetation in the Bighorn National Forest, Wyoming

An approach for synthesizing the results of ecological research pertinent to land management is the analysis of the historic range of variability (HRV) for key ecosystem variables that are affected by management activities. This report provides an HRV analysis for the upland vegetation of the Bighorn National Forest in northcentral Wyoming.

Mistletoes of North American conifers

Mistletoes of the families Loranthaceae and Viscaceae are the most important vascular plant parasites of conifers in Canada, the United States, and Mexico. Species of the genera Psittacanthus, Phoradendron, and Arceuthobium cause the greatest economic and ecological impacts. These shrubby, aerial parasites produce either showy or cryptic flowers; they are dispersed by birds or explosive fruits.

Bark beetles and dwarf mistletoe interact to alter downed woody material, canopy structure, and stand characteristics in northern Colorado ponderosa pine

Due to the recent outbreaks of bark beetles in western U.S.A., research has focused on the effects of tree mortality on forest conditions, such as fuel complexes and stand structure.

Historic forests and endemic mountain pine beetle and dwarf mistletoe

Mountain pine beetle has always been a significant disturbance agent in ponderosa and lodgepole pine forests in Colorado. Most studies have examined the impacts to forest structure associated with epidemic populations of a single disturbance agent. In this paper we address the role of endemic populations of mountain pine and their interactions with dwarf mistletoe infections in forest structure and, the accumulation of coarse woody debris.