Climate change is predicted to cause a series of maladies for world oceans including heating up, acidification, and the loss of oxygen. A newly published study published online in the April 24 edition of the Proceedings of the National Academy of Sciences titled “Ocean warming since 1982 has expanded the niche of toxic algal blooms in the North Atlantic and North Pacific Oceans,” demonstrates that one ocean consequence of climate change that has already occurred is the spread and intensification of toxic algae.
A team of scientists led by Dr. Christopher Gobler, marine science professor in the School of Marine and Atmospheric Sciences at Stony Brook University, used high resolution ocean temperature data along with the growth response of two of the most toxic algae in the North Atlantic and North Pacific Oceans called Alexandrium and Dinophysis. Their study demonstrates that since 1982, broad stretches of these ocean basins have warmed and become significantly more hospitable to these algae and that new ‘blooms’ of these algae have become common in these same regions. Alexandrium and Dinophysis are serious health concerns as they make neurotoxins and gastrointestinal toxins that can cause paralytic and diarrhetic shellfish poisoning in humans.
Photo: NASA/Wikimedia Commons (CC0)