31 May '15, 8pm

What's this and why is it posing a threat to the #GreatLakes? #invasives

What's this and why is it posing a threat to the #GreatLakes? #invasives

Purple loosestrife is easily recognized by its purple to magenta flowers. This species was introduced as an ornamental from Europe, where it is a minor component of wetland vegetation. Here in North America, purple loosestrife has escaped cultivation and is abundant in wetlands and other wet areas (streambanks, lakeshores, and ditches) in almost every state in the U.S. Purple loosestrife forms dense single-species stands that cause a decline in plant diversity and affect wildlife by reducing food and habitat for waterfowl and spawning grounds for fish. A single plant can produce 2.5 million seeds annually, and these seeds can be transported great distances by humans, animals, water, and wind.

Full article: http://www.nature.org/ourinitiatives/regions/northamerica...

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