Tammy Davis

Tammy Davis is the Project Leader of the Alaska Department of Fish and Game's  Invasive Species Program.

According to Presidential Executive Order 13112, an "invasive species" is defined as a species: 1) that is nonnative to the ecosystem under consideration, and 2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health.

Nonnative species become invasive in a new environment when the natural predators, diseases, or other biological mechanisms that kept the species in check within its former habitat are missing in its new environment. Lacking this biological balance, the invading species effectively changes the biodiversity of a locale. This can often cause millions of dollars in damage to local economies.

Scope & Effect

Approximately 50,000 nonnative species have been introduced to the United States as a result of human movements, commerce, and trade. Livestock, pets, food crops, and ornamental plants are examples of species that have been intentionally introduced to the benefit of society. Although many new species are unintentionally introduced to new environments each year, many cannot survive outside their native habitat. Other species thrive, yet have no known adverse effects to the ecosystem into which they are introduced.

Of the remaining introduced species that find the new ecosystem supportive, those that contribute negative effects on the ecosystem or adverse impacts to the economy or human health are labeled invasives. Invasive species can change ecosystems by altering habitat composition, increasing wildfire risk, competing with native species for food and territory, changing existing predator/prey relationships, reducing productivity, or otherwise disrupting natural habitat functions. In doing so, invasive species pose one of the greatest threats to biological diversity.

Aquatic Nuisance Species Management Plan

In 2002, the Department of Fish and Game prepared a management plan to address the threat invasive species pose to the aquatic ecosystems of the state. The Alaska Aquatic Nuisance Species Management Plan (PDF 1,210 kB) was approved by the federal Aquatic Nuisance Species Task Force (ANSTF). Under Section 1204 of the Aquatic Nuisance Species Prevention and Control Act the ANSTF has provided limited funding to state’s with an approved plan.

The ANS management plan describes

  • Alaska’s history of invasion,
  • species considered to be the highest threat,
  • pathways for introduction
  • management actions to
    • prevent the introduction or spread of invasive species,
    • promote early detection and rapid response actions, and
    • control or eradicate invasive species.

How to Report an Invasive Species

You may be hiking along a local trail, casting in a favorite fishing hole, or strolling through the neighborhood when you come across a creature or plant that seems out of place or unusual in your area. If you do, it is important to report it.

Your vigilance could help us intercept and prevent the spread of an unwanted biological invader – an invasive species that shouldn’t be here and which could cause serious harm to Alaska’s native fish and wildlife species, and their habitats. Learn more about nonnative species and why your actions to report odd species are so important.

Note the location (maybe even get a GPS coordinate) and, if you can, take a picture. Then report your find to the Alaska Department of Fish and Game, Invasive Species Program at dfg.dsf.InvasiveSpecies@alaska.gov, or call the Invasive Species Hotline: 1-877-INVASIV (1-877-468-2748). You can also contact Davis at the address below:

Contact Tammy Davis

Contact Tammy Davis

Alaska Department of Fish and Game
Project Leader, Invasive Species Program
1255 W. 8th St.
P.O. Box 115526
Juneau, Alaska  99811-5526
Phone: (907) 465-6183


Service Area

Statewide service provider in:
  • Alaska