Why is didymo a problem?

Didymo is a microscopic algae (diatom) that can produce large amounts of stalk material to form thick brown mats on stream bottoms. Didymo threatens aquatic habitats, biodiversity and recreational opportunities.

Is didymo an invasive species?

A. Past experience with invasive species indicates that eradication of didymo is unlikely. This may be in part due to its widespread distribution and because it is considered a native species in some countries. However, eradicating any microscopic organism from a natural environment is difficult, especially in water.

How does didymo reproduce?

Didymo reproduces asexually when cells divide. As the algae cells divide, the stalks divide as well, forming a mass of stalks. Thick mats of didymo can remain for up to two months after the cells die.

How did didymo get to Canada?

Most speculate didymo was first introduced and is still spread by the movement of contaminated recreational gear (e.g., boats, trailers, fishing line and tackle, National Invasive Species Information Center.

Where was the first didymo found in the United States?

Tennessee: Didymo was found in the tailwaters of the Norris, Cherokee, Wilbur and South Holston hydroelectric dams in 2005, the first U.S. finding east of the Mississippi River. Vermont: In June 2007, didymo was discovered in the Connecticut River near Bloomfield, Vermont, its first recorded discovery in the northeastern United States.

Where was Didymosphenia geminata found in Maryland?

Maryland: In May 2008, didymo was found in the Gunpowder River in Baltimore County. In December 2009, it was found in the Savage River in western Maryland. In May 2012, its presence was confirmed in Big Hunting Creek in Frederick County.

Where is the didymo infestation in New Hampshire?

The nearest infestation is located in the White River, just south of the Missouri- Arkansas border. New Hampshire: During the summer of 2007, didymo was discovered for the first time in New Hampshire in the Connecticut River near Pittsburg.

How to prevent the spread of didymo in New Zealand?

The following methods have been recommended to prevent the spread of didymo in New Zealand: Check: Before leaving the river, remove all obvious clumps of algae and look for hidden clumps. Leave them at the site.