Lakes & Rivers
Alien And Invasive Plants
Butter And Eggs Canada
Thistle Common tansy
Oxeye Daisy Periwinkle
Loosestrife Scotch Broom
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plant species are considered to be one of the greatest threats
to biodiversity not just on Vancouver Island, but world-wide,
second only to loss of habitat, Vancouver Island is being
attacked by many invasive species of plants.
Vancouver Island has very diverse and rare ecosystems that
support many rare and endangered species that depend on these
unique habitats for their survival, Invasive plants can take
over and force the native plants out.
Invasive alien plants are
brought to the Island, either accidentally or intentionally, and
include species like purple loosestrife, scotch broom and
Japanese knotweed. These some of the plant species that are
threatening our indigenous plant species on Vancouver Island.
These invasive plants can
get established easily and because they may have no natural
predators, they can quickly take over an area and quickly force
out native species and this can also have an adverse effect on
our native wildlife. As the animals usually do not eat the
invasive plants and as these plants take over areas, it forces
the wildlife to
further for food.
Some of these plants can
have a direct negative on humans as well, some can have huge
economic impacts by competing with agricultural plantings and
forest harvesting areas. They can also pose significant threats
to humans by causing skin irritation, burns and poisonings.
Vancouver Island has a
real problem with alien species of plants, everyone who lives on
the Island has seen the advance of plants like Scotch Broom.
When I was a young man, you hardly ever saw this plant on the
North Island, now its everywhere you look. I was hiking up a
mountain in the Kelsey Bay area this year and near the top,
almost out of the tree line, there it was, Scotch Broom. This
realy upset me.
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