If the food web on an island gets messed up, there could be a lot of problems for the plants and animals living there. First of all, if one species that a lot of other animals rely on for food disappears or gets reduced, those animals might starve or struggle to find something to eat. For example, if a type of fish that birds eat goes away, the birds might not have enough food, and that could lead to fewer birds overall.
Also, when certain plants or animals are removed from the food web, other species could start to overpopulate. This can happen because there’s less competition for resources, or because there are fewer predators. For instance, if a predator that eats rabbits isn’t around anymore, rabbit populations could explode, and they might eat all the plants they rely on, which can totally change the look of the island’s environment.
This disruption can lead to habitat loss, soil erosion, and problems with water quality too, since plants play a huge role in keeping soil and water healthy. In the long run, these changes can affect the entire ecosystem, making it harder for other species to survive and possibly leading to more extinctions. So basically, if the food web gets broken, it can send lots of ripple effects throughout the whole island, which is really sad!