Coastline: we explain what the “sea line” is, this debris so important for biodiversity

Nothing to do with the one used to walk your dog, this Leash is a kind of “marine litter” which draws a sinuous band and traces the upper limit of the waters. It is also used to map the limit between land and sea. We tell you everything about this coastal strip which is a pantry, essential for biodiversity and contributes to the health of beaches.

The Leash, what is aequo?

This is what is literally “left” by the sea according to the ebb and flow of the tides, the movements of the waves. It is sinuous, more or less long, more or less thick.

What is it made of?

The sea line is essentially composed of natural and human debris deposited by the sea, and which accumulate on the beach. On our coast it is almost permanent, during the tides it is much more mobile.

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Coastline: a clean beach is a disaster for biodiversity

Where did its debris come from?

There are natural debris such as algae, more or less dense wood, dry eggs, carcasses of crabs and other marine animals. More problematic is waste of human origin, in particular cotton swabs, plastic bottles and caps and other microplastics, polystyrene ends, aluminum cans, or even pieces of fishing nets, nylon ropes, pellets. ‘hydrocarbon…

What is it for ?

The sea line is the base of the food chain of the beach ecosystem. It contains bacteria that feed the beach by transforming organic matter. Many small animals take advantage of this mass, to feed and protect themselves, such as sea fleas or crabs.

Why is it essential?

For life, especially birds, which find food and nests in this Leash. The sea leash is not pollution, it is natural! Scientists speak of a feeding zone (food for insects and crustaceans) for many coastal birds such as terns and plover, which take advantage of this zone to develop their nearby nesting site.

How to protect the Sea Leash?

Through awareness and knowledge. Each of us can lend a hand to nature by removing human waste from the route, the largest of course, but also the microplastics that poison the seas. Once done, do not touch anything and simply leave nature …. to nature!

To be continued today – Our article which explains why a clean beach is a disaster for biodiversity.

The Sea Leash is a

The Laisse de mer is a “marine litter”, a sinuous band moving with the waves.
Ve. p.

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