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Wildlife, Animals, and Plants |
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FIRE ECOLOGYFIRE ECOLOGY OR ADAPTATIONS:Fire adaptations: | Russian Knapweed Information regarding fire adaptations of Russian knapweed is not available in the literature. Russian knapweed has a deep-seated, extensive perennial root system that is likely to allow it to survive even severe fire, depending on site conditions. Russian knapweed is also capable of establishing from seed; however, the tolerance of the seeds to heating is unknown, and seed dispersal over any distance larger than the height of the plant requires a dispersal agent [2,58]. It is not known whether Russian knapweed is likely to establish from seed after fire. Fire regimes: | Russian Knapweed Russian knapweed occurs primarily in agricultural communities in the western U.S. and southwestern Canada, where historic fire regimes have been dramatically altered. The historic fire regimes of the more native communities in which Russian knapweed sometimes occurs are of varied frequency and severity. Russian knapweed did not occur in these communities at the time in which historic fire regimes were functioning, but has established since fire exclusion began. It is unclear how historic fire regimes might affect Russian knapweed populations. It is also unclear how the presence of Russian knapweed might affect these fire regimes. Dense infestations of Russian knapweed may change the fire regime by changing the fuel characteristics and fire return interval at a given site. Research in this area is needed. The following table provides some fire regime intervals for communities and ecosystems in which Russian knapweed may be found:
**mean POSTFIRE REGENERATION STRATEGY [74]:Geophyte, growing points deep in soil Secondary colonizer (on-site or off-site seed sources)
Related categories for SPECIES: Acroptilon repens | Russian Knapweed |
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