1. What is a model? What is the relationship between hypotheses and models? Why is making use of a model as a descriptive index for an ecosystem such a difficult, if not impossible, task?
2. In the topic of community dynamics, what are five different types of relationships found between the organisms of the community? Use specific species examples to explain each relationship.
3. List three different nutrients that are cycled through an ecosystem. Describe one in detail. Explain, using a specific example, how one type of human disturbance disrupts this nutrient cycling