Climate Change Is Sending Some Species the Wrong Way

Climate Change Is Sending Some Species the Wrong Way

Source: hakai magazine

11/23/2020

As the oceans warm, many marine species are heading poleward in search of cooler water. But in the northwest Atlantic, researchers have discovered that some invertebrates are shifting the wrong way—their range is moving into warmer, less hospitable water. It’s a head-scratcher with important implications for our changing world.

Heidi Fuchs, a marine biologist at Rutgers University in New Jersey, says she was studying the changing distributions of two species of snails on the east coast of the United States when she realized they had shifted into shallower water.

This migration is baffling because shallow water is often warmer, and warmer water can be lethal for these invertebrates. If they’d simply stayed put, the cooler water offshore should have provided a refuge from temperature increases. Working to figure out what was going on, Fuchs found that while the snails’ spawning habits are changing because of climate change, their adaptations are actually making things worse.