Invasive Species and Mechanisms of Invasions

Invasive species are a present and growing concern for conservation scientists. Invasive species are generally non-indigenous species with large, expanding populations that are causing significant (usually detrimental) effects in this new region. While many organisms and species are introduced to new habitats naturally, deliberately, and/or inadvertently, relatively few reach “invasive” status. There are numerous factors that determine the success or failure of a particular species to become established, including the attributes of the invaders and community vulnerability. Successful invasions can inflict profound ecological and economic costs. In response, there are a variety of methods used to prevent and control invasive species, such as eradication and restoration.

View this module in other languages:
Invasive Species and Mechanisms of Invasions (Ukrainian)
Invasions Biologiques et Contrôle des Espèces Envahissantes (French)

See also:
Great Lakes Under Stress: Invasive Species as Agents of Ecosystem Change
Story of an Invasion: A Case Study of the Rusty Crayfish in the Great Lakes
Applying Critical Thinking to an Invasive Species Problem

Theme: Ecology for Conservation

Language: English

Region: Global

Keywords: ecological consequences, economics, invasive, management, threats

Components: 7

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Synthesis: Invasive Species and Mechanisms of Invasions

Author: C. Finlayson, A. Alyokhin

   

explore

Recommended Resource: The Invasion: A Case Study on the Hudson River

Source: AMNH Science Bulletins, April 2011

The zebra mussel, a notorious invasive species, has been silently infesting the rocky bottom of the Hudson River since it arrived there in 1991. But researchers from the Cary Institute for Ecosystem Studies, who have closely monitored the river before, during, and after the invasion, are noticing a promising new pattern. In this video, learn how the Cary team takes the pulse of this complex freshwater ecosystem to stay abreast of the invasion. 

Recommended Resource: Invasive Species

Source: AMNH Science Bulletins, November 2007

Facing the increased exchange of ship ballast water among worldwide ports, biologists are grappling with a rate and scale of alien takeovers unprecedented in history. In this Bio Bulletin, see the mussels and crayfish that are stressing the vast freshwater network of the Great Lakes region and learn what researchers are doing to give native populations a leg up.


practice

Exercise: Invasive Species and Mechanisms of Invasions

Author: A. Alyokhin, C. Finlayson

   

This exercise is about measuring the abundance of a non-native plant species and its possible impacts on native plants.


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Presentation: Invasive Species and Mechanisms of Invasions

Author: A. Alyokhin, C. Finlayson

Teaching Notes: Invasive Species and Mechanisms of Invasions

Author: A. Alyokhin, C. Finlayson

Solutions: Invasive Species and Mechanisms of Invasions

Author: A. Alyokhin, C. Finlayson


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