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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Forb > Species: Cirsium vulgare | Bull Thistle
 

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FIRE EFFECTS

SPECIES: Cirsium vulgare | Bull Thistle
IMMEDIATE FIRE EFFECT ON PLANT : Fire kills bull thistle if aboveground portions of the plant are completely consumed. However, if 8 inches or more of stem remains unkilled, bull thistle may sprout from tremaining portions of the stem. It does not sprout from the root crown or root [18,23]. DISCUSSION AND QUALIFICATION OF FIRE EFFECT : NO-ENTRY PLANT RESPONSE TO FIRE : When bull thistle is killed by fire, the population must establish from seeds, which germinate any time conditions are favorable [18]. After a spring low-severity prescribed fire on a clearcut site in a western larch (Larix occidentalis) forest in western Montanta, bull thistle was one of the first off-site colonizers. It persisted in the community for only a few years [26]. After a mountain beech (Nothofagus solandri var. cliffortioides) forest fire in New Zealand, bull thistle was a dominant species during the fourth year after the fire on three of the six sites. Six years after the fire it was no longer dominant [21]. DISCUSSION AND QUALIFICATION OF PLANT RESPONSE : NO-ENTRY FIRE MANAGEMENT CONSIDERATIONS : Canada thistle (Cirsium arvense), a species closely related to bull thistle, was subjected to dormant-season low-intensity (1,004 kW/sq m) and moderate-intensity (4,465 kW/sq m) fires. Relative abundance of Canada thistle was reduced the following growing season, and relative abundance of native vegetation increased. This suggests that Cirsium spp. invasions may be slowed or contained by prescribed fire. Fire may be a useful management tool where the more usually recommended cultural and chemical treatments cannot be used [31]. In a clearcut in northeastern Oregon, residue treatment included broadcast burning. Bull thistle germinated and established on heavily burned spots [6]. Twenty years after clearcutting and high-intensity broadcast burning as residue treatment in cold, dry sites of the grand fir (Abies grandis)/wild ginger (Asarum caudatum) habitat type in northern Idaho, bull thistle was a dominant forb [11].

Related categories for Species: Cirsium vulgare | Bull Thistle

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Information Courtesy: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Fire Effects Information System

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