Non-Native Invasive Species

NNIS have significantly impacted United States ecosystems and cost millions of dollars to prevent. Whether it is an insect, plant, weed, aquatic or terrestrial - NNIS can have a huge impact on the ecosystem they invade.

What happens when a NNIS is introduced to an ecosystem? The result can be loss and destruction of forage and/or habitat for wildlife/fish/plants, loss of available grazing land, diminished land values, lost forest productivity, reduced groundwater levels, soil degradation, increased risk of devastating wildfires, and diminished recreational enjoyment. Entire ecosystems and communities are experiencing the detrimental impact of NNIS.,

Pests such as emerald ash borer, hemlock woolly adelgid and spongy moth have long reaching consequences for plant and tree species across the country, killing off ash, hemlock and other tree species. Infestations of non-native invasive insects can cause millions of trees to die. Non-native invasive wildlife can take over or destroy habitat for native wildlife species. Impacts to native wildlife species can then impact the forest ecosystem as natural balances are destroyed. Aquatic invaders can outcompete native and local fish populations or destroy their food source.

Animals

Aquatic Invasive Species

Plants

Several non-native invasive plants are known to occur on the Ottawa National Forest. Some, such as garlic mustard and Eurasian water-milfoil, remain uncommon. Others, such as Japanese barberry, exotic honeysuckle, and glossy buckthorn, are unfortunately quite abundant. Forest Service crews and partners treat hundreds of acres each year. There are currently no known federally-listed noxious weeds on the Ottawa National Forest. To help prevent the introduction and spread of invasive plants, the Ottawa National Forest also has an active invasive plant prevention and education program.

We have prioritized species based on their likelihood to cause ecological harm and the feasibility of control. The ONF invasive plant priority list was developed using the Alien Plants Ranking System (version 7.1), a computer program developed by the National Park Service, Northern Arizona Univerisity, Ripon College, University of Minnesota, and the U.S. Geological Survey. See links for more information. The list was approved by the Ottawa National Forest Management Team on April 13, 2005, and again on May 23, 2017. Comments and questions on the list are welcome. The ranking and list may be revised as new information is gathered.