As warming oceans lose oxygen, large species are at risk

Warming oceans are dangerous for marine species, and not just because the temperature shift can harm delicate species. Warmer waters also lose oxygen – and that could be bad news for many of the large species that live in the Antarctic region. Since the mid-1900s, ocean oxygen levels have declined, on average, by 2 to 5 percent, data shows. Dr. John Spicer of the University of Plymouth and Dr. Simon Morley of the British Antarctic Survey teamed up to see what kind of effect the …