photosynthesis<\/a> takes place.<\/p>Because light diminishes rapidly with increasing water depth, seaweeds typically inhabit shallow waters. However, various seaweed groups possess additional pigments enabling them to utilise different wavelengths of light. Consequently, they can thrive at varying depths, showcasing a diverse array of colours.<\/p>
They can also\u00a0possess\u00a0a slippery coating that allows them to move freely in the water without suffering too much damage. <\/p>
Some species are calcified and can encrust rocks giving them a pretty pink, purple or dark red colour.\u00a0<\/p>
Where can you see seaweed?<\/h2>
Seaweeds can be seen anywhere around the UK on\u00a0rocky\u00a0shores\u00a0and shallow seas, where they anchor to rocks or stones. Just go exploring when the tide is\u00a0out or\u00a0go snorkelling or scuba diving. <\/p>
If you walk along a beach at low\u00a0water,\u00a0you\u2019ll see that different species\u00a0of seaweed will be seen at different heights on the shore. For\u00a0example, channel wrack will be found at the top of the shore whilst kelp species will be found at the\u00a0lower end\u00a0of the shore at the low water mark. This is called zonation and reflects the difference conditions the seaweeds face at different heights on the shore\u00a0and each is brilliantly adapted to copy with these differing conditions.\u00a0<\/p>
Are any seaweeds rare?<\/h2>
Some seaweeds are\u00a0rare,\u00a0and others are super common. For example, many of our wrack species such as bladder wrack or spiral wrack are very common, whilst other species such as maerl, a calcified\u00a0red seaweed, is declining\u00a0as a result of its\u00a0historic\u00a0extraction for soil conditioning\u00a0and harmful fishing practices and other\u00a0damaging activities.\u00a0And it\u00a0takes a long time to grow back, 1mm a year!\u00a0<\/p>
Is seaweed edible?<\/h2>
Seaweeds are grazed by other organisms and often have defence\u00a0mechanisms to stop them, such as noxious chemicals that make the algae taste bad or could even be toxic.\u00a0<\/p>
However, many seaweeds are edible and have been cultivated and traded for centuries, providing a wide range of trace minerals and vitamins.<\/p> <\/body><\/html>\n
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