What are the relationships between populations in an ecosystem and how the removal of a population can affect other populations?

In an ecosystem, populations of different species interact through various relationships, such as predation, competition, and symbiOSis. The removal of one population can disrupt these interactions, leading to cascading effects; for example, if a predator is removed, prey populations may increase unchecked, potentially overgrazing vegetation and affecting other species reliant on that habitat. Conversely, the removal of a key prey species can lead to declines in predator populations due to lack of food. Overall, such changes can destabilize the ecosystem and alter its structure and function.