Artificial Light At Night Boat

Artificial light at night (ALAN) can be a threat to aquatic ecosystems.  Light in the sky penetrates through the water and brightens the water column. Even small increases in light at night can dramatically improve some predators’ ability to hunt and kill their prey. This prey includes threatened juvenile salmon in Lake Washington, a large waterbody in the middle of the Seattle metropolitan area. The artificial light at night project, spearheaded by Tessa Code (middle) works to investigate the relationship between artificial light at night, predators’ hunting ability, and juvenile salmon survival in Lake Washington.