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Purple Loosestrife looks pretty, doesn't
it? Unfortunately, it is an aggressive runaway from people's gardens that has invaded
and taken over North American wetlands. Although colourful, this non-native plant
offers little in the way of food or shelter to wetland wildlife. This is leading
to a serious loss of plant and animal diversity.
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Goldfish, a kind of carp, make popular household
pets. But many of these goldfish end up being released into local marshes, where
they do a lot of damage. During feeding and spawning, this non-native species uproots
aquatic plants and stirs up mud, decreasing the amount of sunlight needed for underwater
plant growth.
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