Okanagan's Most Unwanted

The Purple Loosestrife and The Smallmouth Bass

These are "Invasive Species" in the Okanagan

Invasive species are animals or plants that do not belong in that environment. The species that do belong there are called "native species".

They can spread to other environments by humans or accidental mistakes such as shipping it or the wind blowing a seed.

Invasive species have an impact because they can invade and kill native species to the Okanagan.

My Invasive Species: Smallmouth Bass and Purple Loosestrife as seen in the pictures below.

My Invasive Species

Their Scientific / Common Name

  • Common Names: Purple Loosestrife ~ Smallmouth Bass
  • Scientific Names: Lythrum Salicaria ~ Micropterus Dolomieu

Hangouts / Sightings For My Insasive Species


Smallmouth Bass can be found in these lakes: Okanagan Lake, Osoyoos Lake, Skaha Lake and Vaseux Lake.

Purple Loosestrife can be found in these locations: is found in wet areas at low- to mid-elevations, growing in ditches, irrigation canals, marshes, stream and lake shorelines and shallow ponds in the Okanagan.


Purple Loosestrife: There is 0.

Smallmouth Bass: Okcanagan Lake, Shaha Lake, Shannon Lake, Osoyoos Lake, Vaseux Lake.

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Where They Came From and How They Got to the Okanagan.

Purple Loosestrife: It originally came from Port Alberni garden in 1916 and has spread to the Okanagan. It has spread from 2 ways. One, inside of a water ballast of a ship in Europe. It has also unintentionally came to the Okanagan because it was introduced as a medical plant and in the hands of beekeepers because it has a popular yield of honey. People aslo thought it was ornamental.

Smallmouth Bass: It has arrived in BC in 1901 as fry or fingerlings, planted in lakes on Vancouver Island. It has spread both naturally, moving through lakes, rivers, streams and with the help of fishermen, who released bass into lakes to establish private fishing opportunities.

Impacts or "Crimes" The Invasive Species Has to the Local Ecosystem.

Smallmouth Bass: They are aggressive predator fish. They out-complete native fish and eat any bite-size fish standing in their way. They are a treat not only to freshwater biodiversity, but also to fish that support commercial and recreation fisheries.

Purple Loosestrife: They will out-complete plant species for light , space and pollinators, and choke native wildlife under a sea of purple flowers and dense, tight strands. It also clogs irrigation systems and obstructs waterways used by recreational boaters. In USA, over 200,000 hectares / 494,211 acres of wetlands are lost each year because of purple loosestrife.

How They Spread Or Reproduce

Purple Loosestrife: A plant can provide up to 2.7 million seeds per year. Purple loosestrife is good at reproducing , and will quickly form dense stands that crowd out other plant species and destroy habitat for native wildlife.
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How to Prevent the Spread of These Invasive Species

Purple Loosestrife: There is one good time to remove the purple loosestrife and that is June and early August when it is in flower. Some small areas can be dug up by hand. Cutting off the flower help before they go to seed in the future.

Smallmouth Bass: There is not alot of ways to help prevent smallmouth bass. One of the ways is to go fishing for them and take them elsewhere, but that will take a long time.