Green Algae in Brittany: an Agricultural Scourge that Threatens Oyster Farming

parismatch.com

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In Brittany, the proliferation of green algae threatens oyster farming in Morlaix Bay. Feeded by agricultural nitrates and exacerbated by global warming, these toxic tides choke oysters and exhaust oyster farmers. An alarming spiral that nothing seems to be stopping.

charentelibre.fr

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Feeded by manures and nitrogenous fertilizers, green algae swarm into Morlaix Bay, until they choke the oysters that are raised there.

MARINE & OCÉANS

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Carantec (France), 26 Jul 2025 (AFP) – Feeded by manures and nitrogen fertilizers, green algae swarm into Morlaix Bay, until they choke the oysters that are raised there. The phenomenon, no doubt aggravated by global warming, threatens oyster farmers with extinction. "It's a real invasion", plague Marc Le Provost, 58 [...]

L'Opinion

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Carantec - Feeded by manures and nitrogenous fertilizers, green algae spread in Morlaix Bay, until they choke the oysters that are raised there. The phenomenon, no doubt aggravated by global warming, threatens the extirpation of oyster farmers. "It's a real invasion," says Marc Le Provost, 58, with his feet in the water in the middle of an oyster park in Carantec (Finestery), holding in his hand an oyster entangled in a cluster of green algae. "…