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Keyword: invasives

Proactive or reactive? Optimal management of an invasive forest pest in a spatial framework

Publications Posted on: September 30, 2016
This paper offers a preliminary investigation into the conditions under which it might be optimal to engage in proactive management of a non-timber forest resource in the presence of an invasive species whose spread is unaffected by management action. Proactive management is defined as treating an uninfected area in order to encourage healthy ecosystem function, given that the arrival of the invasive is inevitable.

The bane of weed management: Secondary invasions

FS News Posted on: August 03, 2016
Exotic plant invaders are global threats to ecosystems and millions of dollars are spent each year to fight invasions. A new study shows that current treatment methods could inadvertently promote a second invasion by exotic plants instead of desired native plants and negatively impact ecosystem restoration.

Comprehensive inventory of forest health trends in New Mexico

Science Spotlights Posted on: September 09, 2015
Background The public, forest managers, and scientists now have the most comprehensive inventory of forest health trends in New Mexico’s history. The report New Mexico’s Forest Resources, 2008-2012, summarizes the most recent inventory of New Mexico’s forests based on field data collected from more than 3,000 forest areas between 2008 and 2012.

A new look at the race for survival: Cheatgrass biocontrol with “black fingers of death”

Science Spotlights Posted on: September 09, 2015
Cheatgrass is one of the most destructive plant invaders in the West with significant economic and ecological impacts on rangelands and agricultural lands. The seed pathogen "black fingers of death" is a promising tool under consideration for biocontrol of cheatgrass. Understanding the effects of slow-growing versus fast-growing pathogen strains may be the key to successfully slow down or stop cheatgrass seed germination.

Learning to live with cheatgrass: Giving up or a necessary paradigm shift?

Publications Posted on: September 16, 2014
Natural ecosystems in the semiarid West face many stressors. Among the most challenging are those associated with invasive plant species. One invader that has had great impact over the last 100 years is the annual grass known as cheatgrass (Bromus tectorum). A few years ago, I made two observations that both confirmed and broadened my perception of this plant.

Nonnative plant response to silvicultural treatments: A model based on disturbance, propagule pressure, and competitive abilities

Publications Posted on: September 27, 2011
Invasion by nonnative plants can result in substantial adverse effects on the functions of native forest ecosystems, including nutrient cycling and fire regimes. Thus, forest managers need to be aware of the potential impacts of management activities, including silvicultural treatments, on nonnative vegetation.

Cheatgrass - native plant community interactions in an invaded southwestern forest

Publications Posted on: June 09, 2010
Invasions by nonnative plant species such as cheatgrass (Bromus tectorum) are a major concern in many ecosystems worldwide. When invasive nonnative species dominate a new ecosystem, they can alter biodiversity, species composition, nutrient cycles, disturbance regimes, and other ecosystem functions and processes. In 2003, cheatgrass rapidly spread through the Mt.

Exotic invasive plants

Publications Posted on: March 25, 2008
Ecosystems worldwide are threatened by nonnative plant invasions that can cause undesirable, irreversible changes. They can displace native plants and animals, out-cross with native flora, alter nutrient cycling and other ecosystem functions, and even change an ecosystem's flammability (Walker and Smith 1997).

The role of wildfire in the establishment and range expansion of nonnative plant species into natural areas: A review of current literature

Publications Posted on: July 19, 2007
Nonnative invasive plants are one of the greatest threats to natural ecosystems worldwide (Vitousek et al. 1996). In fact, their spread has been described as "a raging biological wildfire" (Dewey et al. 1995). Disturbances tend to create conditions that are favorable for germination and establishment of plant species.