Invasive Minnows Cause Algae Infestation in French and Spanish Lakes

Minnows used as live bait by anglers are being blamed for the green hue in lakes in the French Pyrenees and Spain. These tiny fish, which have thrived and disrupted the ecosystem after escaping hooks, have been devouring amphibians, insects, and zooplankton that play a crucial role in keeping the water clear and pure. Other factors contributing to the abundance of algae in the lakes include the concentration of cattle herds and higher temperatures due to global warming. Efforts to eliminate the minnows have been made, but there is a need to address pollutants and climate change to restore the lakes' ecosystems.