What is an invASIVE SPECIES? 

​An Invasive Species is a non-native species that causes harm to humans, the environment, or the economy.

what is the diffeRENCE BETWEEN an invasive & a weed?

Invasive species cause some kind of harm. A common theme among invasive plants in Alaska is their tendency to form monocultures, crowding out any other species and reducing biodiversity. 

There are some native species which are considered 'weeds' like yarrow, horsetails, even fireweed! They tend to spread aggressively, which may not be ideal in your yard or garden but play an important role in Alaska's wild lands. 

wHAT INVASIVE SPECIES ARE IN aNCHORAGE?

In Anchorage, invasive terrestrial plants are common.

Did you know we also have:

• Elodea (aquatic plant)
• Rats
• Northern Pike
• European Black Slugs
• European Starling

​What does ANC-CISMA do?

Strategic Planning & Surveying

In 2024, ANC-CISMA members worked together to create a strategic plan for Anchorage to act as a guiding document for decision making, including both species and areas.

We are also in planning process for a species-specific management plan for Prunus trees.

Using these guiding documents, partners identify important areas to survey for invasive plants. 

Invasive Plant Management

ANC-CISMA members use Integrated Pest Management practices to manage invasive plant infestations, including cultural, physical, and chemical methods.

The Alaska Invasive Species Partnership has created a great resource on Integrated Pest Management in Alaska.

Restoration

In many places where invasive species are removed, native plant populations are healthy and able to recolonize disturbed areas.

In other areas, restoration may be necessary to re-establish native species which were outcompeted by invasive plants.

Partners also plant trees and host plant salvage events. 

Check out our article on how invasive species are managed in Anchorage!