A new study shows PFAS levels in Great Lakes fish are on the decline as manufacturers have phased out some chemicals in recent decades.

Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States.

Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States. Rising temperatures and the introduction of non-native fishes have been linked to rapid changes in fish communities across the United States.

In the past three decades, fish abundance, richness and uniqueness have diverged across cold and warm streams, and the effects on native fish communities of stream warming and increases in introduced fishes have magnified each other.

In the past three decades, fish abundance, richness and uniqueness have diverged across cold and warm streams, and the effects on native fish communities of stream warming and increases in introduced fishes have magnified each other.