To understand this, we have to look at how nature is connected. Insects are a vital part of the food web. They serve as a primary food source for many other animals, including birds, reptiles, frogs, and small mammals. When artificial light at night disrupts insect life cycles, it leads to much smaller insect populations.
When insects disappear, the animals that eat them begin to struggle. For example, if there are fewer moths and beetles, birds that rely on them to feed their chicks may face starvation. This creates a domino effect. As these smaller predators decline, the larger animals that eat them also lose their food source. This chain reaction is what scientists refer to as a food web collapse.
Furthermore, many insects are essential pollinators. If light pollution reduces insect numbers, plants cannot reproduce effectively. This leads to fewer plants, which means even less food for herbivores and everything else in the ecosystem. Ultimately, what starts as a problem with lights can destabilize the entire biological community over time.
