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Keyword: Centaurea macula

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.

Indirect nontarget effects of host-specific biological control agents: Implications for biological control

Publications Posted on: December 14, 2015
Classical biological control of weeds currently operates under the assumption that biological control agents are safe (i.e., low risk) if they do not directly attack nontarget species. However, recent studies indicate that even highly host-specific biological control agents can impact nontarget species through indirect effects. This finding has profound implications for biological control.

Invasion of an exotic forb impacts reproductive success and site fidelity of a migratory songbird

Publications Posted on: April 21, 2015
Although exotic plant invasions threaten natural systems worldwide, we know little about the specific ecological impacts of invaders, including the magnitude of effects and underlying mechanisms. Exotic plants are likely to impact higher trophic levels when they overrun native plant communities, affecting habitat quality for breeding songbirds by altering food availability and/or nest predation levels.

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.

Invasive plant erodes local song diversity in a migratory passerine

Publications Posted on: October 01, 2014
Exotic plant invasions threaten ecosystems globally, but we still know little about the specific consequences for animals. Invasive plants can alter the quality of breeding habitat for songbirds, thereby impacting important demographic traits such as dispersal, philopatry, and age structure. These demographic effects may in turn alter song-learning conditions to affect song structure and diversity.