***Producers vs. Consumers vs. Decomposers*** Plants Animals Fungi, Bacteria

-What do they do?

-Do they eat?

What is the ORIGINAL source of all energy? Is that still true in a lake ecosystem?

Why are successful introduced species, like the Nile Perch, so successful? What about something like the zebra mussel?

Do introduced species need to be bigger than other organisms to be successful in their new ecosystems?

How can living factors, like predators, food, and competition affect an ecosystem?

How can non-living factors, like light, heat, and water affect an ecosystem?