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The plant that can save the beaches returns to Calafell

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– Will Calafell be able to plant posidonia?

– They track the plant in the waters of Coma-ruga

In the last few weeks, the storms have dragged a large quantity of posidonia remains to the shore of the Calafell beaches, a vital plant for the marine cycle that is highly threatened and that we try to preserve by all means for its essential role in the environment.

What some might consider to be dirt that has been removed by the sea, is actually a natural process that it even reveals hope for the protection of the coasts. That the tide has brought posidonia remains to the shore may indicate that there is a prairie of the species in a nearby area.

Calafell beach full of posidionia.

Last year the Anèl·lides y Oceánicos organization started a project to locate Posidonia meadows in the Coma-ruga and Sant Salvador area with the aim of preserving them and promoting actions that prevent damage from launching anchors that drag the plants.

The arrival of Posidonia to the coast is after many years that it was not seen and presumes that the plant may be recovering in the area. The councilor for Urban Ecology of Calafell, Aron Marcos, points out that a search should be carried out to try to locate meadows.

A posidonia plant

In fact, one of the proposals approved in the participatory budgets for this year is promote the repopulation of posidoniato which 200,000 euros will be allocated.

The posidonia is a guarantee for the protection of the beaches since it slows down the force of the waves and settles the bottoms as well as being a refuge, breeding area and food for many marine species, They absorb CO2 and produce oxygen.

Calafell will promote a study to try to locate the presence of the plant. Widespread decades ago, it had practically disappeared due to the dragging of anchors, dredging to make regenerations like those of 30 years ago or the turbidity of the water due to the lack of purification.

posidonia meadow

The posidonia remains that the sea has taken out should also be left on the shore, at least until the bathing season begins. that form a barrier that slows down the impact of the waves in addition to retaining the sand in suspension carried by the waves.

In terms of recovery, it is difficult and in some parts of the coast there are already attempts to repopulate the seabed, but It is a very slow growing plant and is highly endangered.a. For this reason, it is necessary to delimit and publicize their location to try to avoid anchoring in grassland areas.

The location of possible meadows in the area that are considered could be between the ports of Coma-ruga and Cunit, will also allow monitoring to check their evolution, growth or decline and promote protection.


The doctor in Geology and Geography Francesc Xavier Roig highlights the need to leave posidonia on the shore because it is not waste.
The withdrawal can end up with the beach itself since removing it means also removing tons of sand.

These Posidonia barriers are called Arribazones and usually indicate that there is a nearby meadowin addition to an indicator of water quality, in addition to a barrier for storms.

Posidonia rash.

They provide sand for the beach and organic matter for the dune vegetation, which helps to structure the beaches. Historically, farmers used these accumulations of posidonia from to make mattresses to roof insulation.

In some areas such as Ibiza and Formentera the plant the plant is collected before the summer and put back on the shore after the season.

Roig regrets that Posidonia is “criminalized” and has not been valued as an essential element of the beaches, so proper management should be carried out. Calafell now proposes how to treat that amount of Posidonia that remains on the shore at the gates of the bathing season.

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