ecological

Tons of fish die in Polish canal as toxic golden algae bloom sparks fears of another major ecological disaster

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Tons of fish die in Polish canal as toxic golden algae bloom sparks fears of another major ecological disaster

Tons of dead fish have been removed from the Gliwice Canal in southern Poland after a toxic golden algae bloom triggered a new environmental crisis in the Oder River system. Polish authorities said the fish deaths were linked to Prymnesium parvum, a microscopic organism capable of producing toxins that can be lethal to aquatic life. … Read more

In 1974, a German fisherman released thousands of baby catfish into a Spanish river; 50 years later they are threatening native wildlife as an ‘ecological time bomb’

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In 1974, a German fisherman released thousands of baby catfish into a Spanish river; 50 years later they are threatening native wildlife as an 'ecological time bomb'

German biologist and recreational fisherman Roland Lorkowsky released thousands of juvenile Wels catfish into Spain’s Ebro River in 1974. His goal was simple and positive: to create a world-class sport fishery by introducing one of Europe’s biggest freshwater fish. But today, the Wels catfish has become one of the dominant predators in many Spanish waterways. … Read more