Organisms change and are changed by their environment. Each time a change occurs in an ecosystem, an adjustment in the ecosystem's balance is required. The changes in the environment may be slow or rapid. They may involve individuals, species, or entire communities. But because all ecosystems are subject to the same types of change, these can be studied and sometimes controlled.
All ecosystems adjust in response to change in an attempt to maintain a state of dynamic balance.
Performance Objectives 1-3 1. Describe how competition can serve as a limiting factor. Describe how predation can have a positive impact on prey. Define a symbiotic relationship. Distinguish among commensalism, mutualism, and parasitism.