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Keyword: exotic plants

Short-term understory plant community responses to salvage logging in beetle-affected lodgepole pine forests

Publications Posted on: December 12, 2017
Recent bark beetle outbreaks in western North American subalpine forests have prompted managers to salvage log some beetle-affected stands. We examined the short-term (i.e., two to three years post-treatment) consequences of such salvage logging on vascular understory plant (i.e., graminoid, forb, and shrub) communities.

Mulching fuels treatments promote understory plant communities in three Colorado, USA, coniferous forest types

Publications Posted on: January 05, 2017
Mulching fuels treatments have been increasingly implemented by forest managers in the western USA to reduce crown fire hazard. These treatments use heavy machinery to masticate or chip unwanted shrubs and small-diameter trees and broadcast the mulched material on the ground. Because mulching treatments are relatively novel and have no natural analog, their ecological impacts are poorly understood.

Native species richness buffers invader impact in undisturbed but not disturbed grassland assemblages

Publications Posted on: November 18, 2016
Many systems are prone to both exotic plant invasion and frequent natural disturbances. Native species richness can buffer the effects of invasion or disturbance when imposed in isolation, but it is largely unknown whether richness provides substantial resistance against invader impact in the face of disturbance.

Linking wilderness research and management-volume 4. Understanding and managing invasive plants in wilderness and other natural areas: an annotated reading list

Publications Posted on: May 12, 2016
Nonnative invasive plants are altering ecosystems around the world with alarming speed. They outcompete native plants and ultimately change the composition and function of the ecosystems they invade. This poses a particular problem in wilderness and other natural areas that are set aside to maintain natural conditions.

Non-target effects of an introduced biological control agent on deer mouse ecology

Publications Posted on: December 15, 2015
Release of exotic insects as biological control agents is a common approach to controlling exotic plants. Though controversy has ensued regarding the deleterious direct effects of biological control agents to non-target species, few have examined the indirect effects of a "well-behaved" biological control agent on native fauna.

Invasive Species Working Group

Groups Posted on: December 14, 2015

Plant invasions: How do mild-mannered plants transform into superinvaders?

Media Gallery Posted on: July 30, 2015
(Click on an image to see it in full view.)

Plant invasions: How do mild-mannered plants transform into superinvaders?

Projects Posted on: May 19, 2015
For over 10 years, Rocky Mountain Research Station scientists and their partners have engaged in research to 1) determine the causes underlying plant invasions, 2) identify invader impacts in native systems, and 3) improve the efficacy of invasive plant mitigation efforts.

Weak vs. strong invaders of natural plant communities: Assessing invasibility and impact

Publications Posted on: April 21, 2015
In response to the profound threat of exotic species to natural systems, much attention has been focused on the biotic resistance hypothesis, which predicts that diverse communities should better resist invasions. While studies of natural communities generally refute this hypothesis, reporting positive relationships between native species diversity and invasibility, some local-scale studies have instead obtained negative relationships.

Effects of biological control agents and exotic plant invasion on deer mouse populations

Publications Posted on: April 21, 2015
Exotic insects are commonly introduced as biological control agents to reduce densities of invasive exotic plants. Although current biocontrol programs for weeds take precautions to minimize ecological risks, little attention is paid to the potential nontarget effects of introduced food subsidies on native consumers. Previous research demonstrated that two gall flies (Urophora affinis and U.

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