Non-Native Seaweeds

There are about 10,000 species of seaweed in the world. Some species are cosmopolitan whilst others have a restricted range. Human activity has broken down the barriers to spread and many species are now found outside their natural distribution range.

Seaweeds are no exception to anthropogenic influences, e.g. Sargassum muticum is a Japanese seaweed which arrived on the south coast of England in the 1970s and water currents have resulted in a clockwise spread around Britain as far as the north of Scotland. It is now part of the seaweed flora on Great Cumbrae.

The revised check-list of seaweeds of Britain (2015) lists 644 taxa and 31 non-natives. This course aims to look at the subject of non-native seaweeds – their origins, means of spread (accidental or deliberate), arrival, establishment and subsequent distribution in Britain – by means of practical field and lab sessions, lectures and a sharing of knowledge and expertise between course participants.

Marine Biological Association (MBA) Members – 10% discount

If you are a Member of the MBA you can enjoy a 10% discount on this course. Please use the voucher code MBA10 at the checkout and you will be asked for proof of membership before we take the money.

Key Information

Start date:


From £160


Field Studies Council




Biodiversity, Ecology



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