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Big Seaweed Search
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Unlocking the secrets of our seaweeds to track change on British seashores: The Big Seaweed Search invites you to contribute to real scientific research from the Natural History Museum and the Marine Conservation Society. We need people to search for seaweeds all around the British Isles, to help us better understand and protect this vitally important habitat. At the same time you can enjoy exploring the coast with your friends or family. The Big Seaweed Search survey is helping to track the diversity of seaweeds across Britain’s coasts. Data will be used by scientific researchers at the Museum to understand how seaweeds are affected by environmental changes including sea temperature rise, ocean acidification and the spread of non-native species.

The Big Seaweed Search first launched in 2009. Hundreds of people took part and the data gathered, alongside other research, show that the distribution of seaweeds around the UK is changing. Now we aim to scale up the survey to collect thousands of new observations and to focus on key environmental issues that need more research. These issues are: rising sea temperature; the arrival and spread of non-native species of seaweed; and ocean acidification (the sea becoming more acidic as a result of absorbing carbon dioxide from the air). Home to a particularly high diversity of species, the UK is a special place for seaweeds. Unfortunately, seaweeds are not as popular as flowers, butterflies or birds, so fewer people make and submit observations of them. As a result, we know comparatively little about the abundance and distribution of seaweed species, and how this may change over time. Understanding more about seaweeds is critical to protecting marine environments.

Big Seaweed Search
How to participate:
1. Download and print the Big Seaweed Search guide PDF (3.3MB) and recording form PDF (69KB) or request a free copy by emailing your name and postal address to seaweeds@nhm.ac.uk. 2. Visit the seashore and choose your survey plot. This should be a five-metre-wide strip that runs from the top of the shore right down to the sea. 3. Walk to the sea, then take a photo of your plot (with your back to the sea). 4. Walking away from the sea, thoroughly explore the whole of your five-metre-wide plot. Record the seaweeds you find on the recording form and photograph them. 5. Submit your results and photos using our online form, or post them with printed photos to: Big Seaweed Search Angela Marmont Centre for UK Biodiversity The Natural History Museum Cromwell Road London SW7 5BD You can send in records at any time of the year and as many times as you like.
Needed equipment:
● Big Seaweed Search recording forms and identification guides ● A smart phone or camera to take photographs ● First aid kit ● Pencils and clipboards
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