European native oyster ecosystems have been classified as a "collapsed" species, after an assessment of historical and ecological data revealed it has faced extreme decimation.
I’ve dived in the Mar Menor in Spain, and walked on the shores of the Baron Island. The shores on the island are literally full of oyster shells, but I’ve never seen one on the seabed. The decline of mollusks and their filtering function is one of the factors in the decline of the water quality that has reduced the biome’s diversity. Tha major factor is fertilizer runoff from intensive farming nearby.
I’ve dived in the Mar Menor in Spain, and walked on the shores of the Baron Island. The shores on the island are literally full of oyster shells, but I’ve never seen one on the seabed. The decline of mollusks and their filtering function is one of the factors in the decline of the water quality that has reduced the biome’s diversity. Tha major factor is fertilizer runoff from intensive farming nearby.