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Spotted knapweed: Effects of climate change on the invasiveness and biological controlAuthor(s): Yvette Ortega; Dean Pearson
Source: In: Fornwalt, Paula. Invasive Species Science Update (No. 6). Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 4.
Publication Series: Miscellaneous
Station: Rocky Mountain Research Station
PDF: Download Publication (202.0 KB)
DescriptionExotic weeds have invaded vast stretches of forest and rangeland, yet as highlighted by the previous review by Runyon and others in this issue, little is known about the factors driving the success of these invaders or how factors such as climate change may alter outcomes. Spotted knapweed (Centaurea stoebe) is one of the worst weeds in the Western U.S., infesting over seven million acres. Even so, knapweed populations declined in Western Montana in the early 2000s, coincident with severe drought. Furthermore, the biocontrol agent, the knapweed root weevil (Cyphocleonus achates), was established at some of the sites where strong declines in knapweed occurred, suggesting that this weevil could have a role in suppressing the notorious invader under conditions of drought stress.
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CitationOrtega, Yvette; Pearson, Dean. 2013. Spotted knapweed: Effects of climate change on the invasiveness and biological control. In: Fornwalt, Paula. Invasive Species Science Update (No. 6). Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 4.
Keywordsinvasive species, biological control, spotted knapweed, Centaurea stoebe
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- Seasonal change in nutrient composition of spotted knapweed and preference by sheep
- Deer mouse predation on the biological control agent, Urophora spp., introduced to control spotted knapweed
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