- Native: A species that occurs naturally in an ecosystem. No human influence.
- Non-native: Not originally from the area it is found growing but does not cause harm to the ecosystem.
- Invasive: A species that is non-native to an ecosystem and is likely to cause economic or environmental harm or harm to human health.
- VITAL SIGNS- http://vitalsignsme.org/
- FMS Invasive Species Site- https://sites.google.com/a/rsu5.org/invasive/