| Term | Definition |
| Food chain | energy links between different organisms in an ecosystem based on feeding habits |
| Ecosystem | all the interactions and relationships of organisms |
| Riparian | name of the river/ along water ecosystem |
| Producer | organisms that create food/energy by photosynthesis |
| Consumer | Organisms that eat food producers |
| Herbivore | organism that only eats plants |
| Carnivore | organism that only eats meat |
| Prey | animals that get eaten |
| Predator | eats the prey |
| Trophic level | nourishment levels up a food chain |
| Omnivore | organism that eats both plants and animals |
| Food web | interconnected food chains in an ecosystem |
| Decomposer | break down molecules of dead organisms for energy |
| Biomass | total weight of one species of organisms in that ecosystem |
| Biomagnification | process of poison traveling through a food chain to concentrate on one animal |