Summary
Alien invaders are taking over the bottom of the River Thames, threatening native water life, the Marine Conservation Society said yesterday. The zebra mussel, so-called because of its stripy shell, is breeding so quickly that experts fear it could interfere with the capital's water supply.
Despite being no bigger than a thumbnail, the tiny intruders can alter the shape of the river bed by clustering in huge "reefs".See the full content of this document
Extract
Alien Mussels Hitch a Lift to Trouble
This results in other species be...
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