Green Invasive Algae Worries New England Fishermen

By THE ASSOCIATED PRESS
Published: August 25, 2007
Filed at 4:50 p.m. ET

STOCKBRIDGE, Vt. (AP) -- It looks like a clump of soiled sheep's wool, a cottony green or white mass that's turning up on rocks and river bottoms, snarling waterways.

Already a scourge in New Zealand and parts of the American South and West, the aquatic algae called ''rock snot'' is creeping into New England, where it is turning up in pristine rivers and alarming fishermen and wildlife biologists.

''It scares me,'' said Lawton Weber, a fly fishing guide, who first spotted it on the Connecticut River in northern Vermont in June. ''It's an aesthetic eyesore when it's in full bloom mode and its impact on the trout population is going to be significant.''

Over the past 10 years, the algae with a scientific name of Didymosphenia geminata, or didymo, has turned up in California, Washington, Alaska, Idaho, Montana, Nevada, Utah, Wyoming, Colorado, the Dakotas, Missouri, Arkansas and Tennessee.

''We're starting to realize it's all over the place,'' said Karl Hermann, a regional waste monitoring and assessment coordinator for the Environmental Protection Agency in Denver.

What started out in Vancouver Island in British Columbia ''has suddenly just skyrocketed,'' he said.

The algae has the potential to bloom into thick masses with long stalks, blanketing the bottoms of some streams, threatening aquatic insect and fish populations by smothering food sources.

In New England, it has turned up in the White River, Connecticut River and the Batten Kill, a trout fishing mecca in southern Vermont that's famed for its hard-to-catch fish. Quebec is grappling with it in Matapedia River in the lower St. Lawrence.

There's no easy way to get rid of it. Experts say the only hope is to keep it from spreading. But that's a lofty challenge, since a single cell carried on absorbent fishing gear or clothing can be transferred -- unknowingly -- into other waters.

Vermont and New Hampshire have launched a radio campaign urging river users to scour their boats and clean their gear.

''Please don't take chances, disinfect your fishing gear,'' said Scott Decker, program supervisor with the New Hampshire Fish and Game Department.

http://www.nytimes.com/aponline/us/AP-Rock-Snot.html

That'd give the trout a free meal at some point too.

:shrug:

If they can find a species of something that lives on this algae (and ONLY on this algae), then they can do biological control. That's a huge if.

Especially in Maine...