A new study warns of a 20-40% reduction in biodiversity in the ocean's twilight zone by the end of the century due to climate change. If high emissions persist, severe depletion could occur within 150 years, with no recovery for thousands of years. The research highlights the urgent need to reduce g
Climate change could cause a 20-40% reduction in life in the ocean’s twilight zone by the end of the century, according to a new study. If high emissions continue, the twilight zone could see severe depletion within 150 years with no recovery for thousands of years.
The twilight zone, which lies 200 to 1,000 meters deep, gets very little light but is home to a wide variety of organisms and billions of tonnes of organic matter. “We still know relatively little about the ocean twilight zone, but using evidence from the past we can understand what may happen in the future,” said Dr. Katherine Crichton, from the University of Exeter, and lead author of the study.
“In these warm periods, far fewer organisms lived in the twilight zone, because much less food arrived from surface waters.” “The rich variety of twilight zone life evolved in the last few million years, when ocean waters had cooled enough to act rather like a fridge, preserving the food for longer, and improving conditions allowing life to thrive,” said Dr. Crichton.
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