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Global warming is faster than evolution

 E-Mail IMAGE: If the warming continues, many species may have trouble keeping up. Zebrafish (Danio rerio) is one of them. view more  Credit: Photo: Per Harald Olsen, NTNU The world is getting warmer, and life has to adapt to new conditions. But if the warming continues, many species may have trouble keeping up. It looks like evolution is slower than global warming in this case, says Fredrik Jutfelt, an associate professor at the Norwegian University of Science and Technology s (NTNU) Department of Biology. Jutfelt is a senior author of a new article in the Proceedings of the National Academy of Science, PNAS. He and his research group at NTNU have spent four years studying how a tropical fish species called zebrafish (Danio rerio) adapts to a warmer climate, especially with regard to extreme warm periods. Dr. Rachael Morgan, now at the University of Glasgow, is the lead author.

Global warming is faster than evolution -- and this could spell trouble for marine life

Zebrafish (Danio rerio). Credit: Per Harald Olsen, NTNU. The climate is always changing, say some skeptics who downplay the urgency and impact of anthropogenic global warming. What they miss is that natural climate change occurs over a much broader timeline, which typically allows species to evolve and adapt to their new environment. The only exceptions are during mass extinctions, and some scientists not only believe that today’s climate change is unnatural, but that it’s representative of a new mass extinction, the sixth one since complex life appeared on Earth. Case in point, a new study performed the largest artificial evolution experiment on warming tolerance, showing that the rate of global warming is faster than the rate of evolution in zebrafish. For other slow-breeding animals, global warming may actually be even faster than their innate capacity to adapt.

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