Oceans. For centuries people have regarded them as an inexhaustible supply of food, a useful transport route, and a convenient dumping ground - simply too vast to be affected by anything we do. But human activity, particularly over the last few decades, has finally pushed oceans to their limit.
The NWAE is best known for the early 1990s collapse of its once abundant Atlantic cod stocks. The depletion of this important species has changed the food web, leaving an ecosystem that is less resilient to other threats (e.g., climate change). Most cod stocks have not recovered despite more than a decade of moratoria. Fishing effort has since shifted to invertebrate species, including crab and lobster, and now there are indications that some of these populations are declining.