Dead fish in Florida. Beached whales in New Jersey. Sea urchins and starfish washing ashore in New Zealand. Warming oceans and marine heat waves are driving sea creatures from their normal habitats and leading to a spate of deaths around the world.
So-named because in large numbers the algae stain the water red, these toxic blooms occur when winds blowing across the ocean surface push that water away and bring deeper, nutrient-rich waters to the surface. This process, known as “upwelling,” creates the ideal conditions for algae to bloom.also block sunlightThe Environmental Protection Agency predicts that climate change will alter the “timing and intensity” of coastal upwelling, potentially leading to more algal blooms along the West Coast.
Algal blooms can be caused by humans, too. A rare golden algae thought to have led to a mass fish die-off in the Oder River that runs along the border between Germany and Poland last summer may have been caused by industrial discharges into the river, according to
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