Alien invasion from garden ponds


The attractive but unwanted garden pond escapee Parrot's-feather

The attractive but unwanted garden pond escapee Parrot's-feather

Bringing in exotic species – like Grey Squirrels and Signal Crayfish, two species which have virtually exterminated their native equivalent – is a bad idea.

And there’s no getting away from it for us garden pond fans. Garden ponds can be great, but they’re still a great threat as well to our native wildlife.

This is because stocking garden ponds with exotic plants has been a major route for the introduction of alien invasive plants.

There’s little doubt that plants like New Zealand Pigmyweed and Parrot’s-feather are spreading. In the New Forest, for example, which still has one of Britain’s biggest concentrations of really top notch ponds – alien plants are now widespread.

The real problem is that nobody knows how much damage these plants are causing. Are they just becoming part of the scene or are they. like the squirrel and the crayfish, sending native species spiralling towards extinction?

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