Not all the plants and animals living in our canals and rivers are native to the UK. Some species have been introduced, often with disasterous results for our precious ecosystems.
Invasive species can cause devastating effects to native wildlife, competing for food, space, sunlight, and water. The animals can often be bigger and more aggressive, while the plants choke canals and rivers with their rapid growth.
Read more:
http://canalrivertrust.org.uk/news-and- ... es-gallery_________________
Maurice
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