| A | B |
|---|
| Biodiversity | The variety of life in the world or in a particular habitat or ecosystem. |
| Habitat | The natural home or environment of an animal, plant, or other organism. |
| Biodiversity index | A measure of biodiversity for an area by dividing the total number of species by the total number of individuals. |
| Biomagnification | The process by which toxin accumulates in bodies of predators. |
| Ecosystem services | A benefit that humans obtain from the environment. Types of services include provisioning, such as the production of food and water; regulating, such as the control of climate and disease; supporting, such as nutrient cycles and oxygen production; and cultural, such as spiritual and recreational benefits. |
| Introduced species | A species that is brought to a place by humans and becomes part of the local ecosystem. |
| Invasive species | An introduced species that has a negative impact on an ecosystem. |
| Keystone species | A species that is critical for the overall health of an ecosystem. |
| Limiting factor | Any biotic or abiotic component of the ecosystem that controls the size of a population. |
| Native species | A kind of organism that has been part of an ecosystem for a long time. |
| Sampling | A technique to count the organisms in a selected area to make inferences about the total number of organisms. |
| Sustainability | Avoidance of the depletion of natural resources in order to maintain an ecological balance. |
| Eutrophication | Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen. |
