Make up a change in the biotic factors of your ecosystem. Examples could include: an introduction of an invasive species, a species becoming extinct, a species becoming overpopulated, etc.
In my ecosystem, a new predator species has been introduced - the red fox. This invasive species has caused a decline in the population of small mammals such as rabbits and mice, as the red fox preys on them for food. This has led to a decrease in the overall biodiversity of the ecosystem, as the small mammals play a crucial role in the food chain and ecosystem dynamics. The presence of the red fox has also put pressure on native predators such as the owl and hawk, as they now have to compete for limited resources. The introduction of the red fox has disrupted the delicate balance of the ecosystem and has had cascading effects on the entire community.
