Invasive species are moving beyond native habitats due to travel and transport, as highway corridors cut through the geologic barriers that once prevented spread. Construction activities can also introduce invasive species through the use of contaminated equipment or weedy soil and gravel.
Infestations of invasive species can reduce the productivity of agricultural and rangeland, disrupt ecological processes, harm recreation and land values, increase soil erosion, and create health risks for humans, animals and crops. Roadside infestations can create unsafe conditions for road users, damage roadways, and increase costs for mowing and spraying.
Transportation agencies must play an active role in preventing and controlling invasive species, but have limited budgets for long-term control and eradication. This webinar will introduce the science around invasive species movement, and identify areas in the transportation sector where prevention and control efforts could be focused.
Originally presented July 28, 2020.
Shauna Lehmann, Saskatchewan Ministry of Highways and Infrastructure
Shauna Lehmann is the Director of Environment at the Saskatchewan Ministry of Highways and Infrastructure, a board member on the Saskatchewan Invasive Species Council, and Chair of TAC’s Environment & Climate Change Council. Shauna’s passion for invasive species management began several years ago after attending a conference of the North American Invasive Species Management Association. Since she tends to talk about weeds a lot, she often finds random plant parts left on her desk with a note asking for identification – a practice she wouldn’t necessarily recommend, but it’s more entertaining than looking at photos.
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