Few landscapes are immune to invasion by exotic plant species. The forested landscape in the western Cascade Range of Oregon appears to have some barriers to invasion, but the extensive road network provides a corridor and habitat for a suite of exotic species to enter and become established. This study...
This project explores mechanisms governing the invasion of fluvial systems by two
contrasting exotic species in stream networks of steep, relatively remote forested landscapes
of western Oregon. This research addresses hypotheses relating limitations of seed source
locations, seed transport processes, and sink availability to the distributions of scotch broom
The extent of biological invasions, their role on the feeding of
native fishes and their impact on community stability were
investigated in Alsea Bay and Yaquina Bay, two estuaries on the
central Oregon coast, USA. Most nonindigenous species (NIS)
introduced in these intermediately invaded estuaries are
considered byproducts of culturing...
Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize...
Studies were conducted from 1962 to 1966 to investigate the
effectiveness of several practices in manipulating medusahead
(Taeniatherum asperum (Sim. ) Nevski) infested and/or dominated
ecosystems by releasing competition in favor of perennial grasses.
Several herbicide treatments were evaluated for selective
control of medusahead and cheatgrass (Bromus tectorum L. )...
A species of Ephedra found in southeastern Oregon,
identified as Ephedra viridis Coville is reported of medicinal
value among the American Indian tribes and other
dwellers of that locality in various affections such as
venereal diseases, kidney and bladder disturbances, in
stomach ulcers and abdominal pains, in delayed menstruation,
Invasive nonnative plants are a serious subject for gardeners, farmers, the general public, and land managers. Understanding invasive species and how to control them is becoming increasingly important for gardeners.
Blue-striped Brodiaea or Leach's Brodiaea (Triteleia hendersonii Greene var. leachiae [Peck] Hoover, or Brodiaea hendersonii Wats. var. leachiae ) Lily Family (Liliaceae) is found in the foothills of the Siskiyou Mountains of Curry, Coos and Josephine Counties of southwestern Oregon. It is occurs in a variety of habitats including meadow...