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IMPACTS OF INVASIVE PLANTS
Invasive plants affect biodiversity by rapidly displacing native plant species that provide habitat for wildlife, and food for people and livestock. Invasive plants pose a threat to rare ecosystems, increase the frequency of wildfires and reduce survival rates of native species following fire. In addition, riparian habitat alteration may result in erosion, sedimentation and loss of aquatic habitat.
ENVIRONMENTAL IMPACT
Competition from invasive plants can result in:
- suppressed native plant and seedling growth
- less palatable and sometimes poisonous weed species within the plant community
- increased fire hazard as unpalatable plant material builds up
- future native plant communities under threat from weed seeds that remain viable in the soil for decades
- alteration of water flows
ECONOMIC IMPACT
Invasive plants threaten the health of our resources and supported industries. Noxious weed infestations can:
- reduce forage quality & yield
- cause irritation or poisoning to humans, wildlife and livestock
- cost taxpayers many $$$ to control
- reduce vigor of tree seedlings where planted
- reduce property & aesthetic value
- restrict recreational opportunities when poisonous and thorny weed infestations are present
HEALTH IMPACT
Toxins in some plants make them inedible to animals and may cause liver damage. Toxins may also cause skin irritations and blisters in both animals and humans.
Sulphur Cinquefoil infestation reduces forage for wildlife and cattle. Photo: Lisa Scott |
Hound’s Tongue produces large seeds covered with Velcro-like hooked prickles that easily attach to clothing and animals. Photo: IvO |
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