Ecosystems and Communities

Ecologists study the interactions between organisms and their environments at the ecosystem level. However, ecosystems are just one part of a multi-layered system of ecological organization. In this topic, you will examine each level of ecological organization, ranging from the smallest to the largest. In addition, you will explore the special relationships that some organisms share through symbiosis.

Essential Questions

• What are the different levels of ecological organization?
• What is symbiosis?