Question

1. what is light pollution, and how does it affect nocturnal animals?
2. how can artificial lights confuse sea turtle hatchlings, and what impact does this confusion have on them?

Explanation:

Question 1

Light pollution is the excessive or misdirected artificial light that disrupts the natural light - dark cycle. Nocturnal animals rely on the natural darkness of night for various activities like foraging, mating, and navigation. Light pollution can disrupt their internal clocks (circadian rhythms), make it harder for them to find food as their prey may be affected by the light, interfere with their mating behaviors as some use light - related cues, and disorient them during navigation, increasing their risk of predation or inability to find suitable habitats.

Sea turtle hatchlings naturally move towards the brightest horizon, which in a natural setting is the ocean (reflection of moonlight/stars on water). Artificial lights (like from coastal buildings, streetlights) are often brighter than the natural ocean - horizon light at night. So the hatchlings are confused and move towards the artificial lights instead of the ocean. This confusion leads to them being dehydrated, exhausted, or killed by predators, vehicles, or other human - related hazards as they are not moving towards the safety of the ocean to start their marine life.

Answer:

Light pollution is excessive/misdirected artificial light disrupting natural light - dark cycles. It disrupts nocturnal animals' circadian rhythms, foraging, mating, navigation, and increases predation risk.

Question 2