Melting polar ice has a worrisome list of consequences—methane gas release, rising sea levels, and the liberation of long frozen 750,000-year-old microbes. While melting glaciers probably aren’t going to turn into Jurassic Park, scientists are understandably concerned how they might affect the environment. Scientific American has a new feature on the impact of these liberated microbes on ocean life:
More likely is [the] prospect that thawing ice sheets will allow ancient microbial genes to mix with modern ones, flooding the oceans with never-before-seen types of organisms. Rogers [an evolutionary biology] believes this is already taking place. “What we think is happening is that things are melting out all the time and you’re getting mixing of these old and new genotypes,” he said.