Tier 1 -
Early Detection/ Prevention
Tier 1 species are not known to occur within the PRISM boundary but represent a high potential for spread and establishment if introduced. The goals for these species are early detection/prevention
Tier 2 - Eradication
Tier 2 species are known to occur at a low population within the PRISM boundary.
All are potentially high impact and currently low abundance, with known control measures that make eradication attainable as a management goal.
Tier 3 - Containment
Tier 3 species are species that are too high in abundance within the PRISM boundary for eradication to be likely. The management goal is containment unless particularly effective control methods or adequate funding sources become available. The IPMDAT Tool should be used to assess individual populations for management.
Tier 4 - Local Control
Tier 4 species are too high in abundance for eradication on a regional scale to be likely even with outside funding sources. Management strategy for Tier 4 species is long-term localized suppression or containment. Use the IPMDAT to assess individual populations for control.
Tier 5 - Monitor
Tier 5 species are species that need more research, mapping, or monitoring to understand their invasiveness. This includes naturalized species and cultivated-only species that are known to be invasive in other regions but are not yet invasive here.