Skip to comments.Icky algae alarms New England fishermen ("rock snot")
Posted on 08/26/2007 9:23:07 AM PDT by nuconvert
Icky algae alarms New England fishermen
By LISA RATHKE, Associated Press Writer
Aug 26, 2007
STOCKBRIDGE, Vt. - 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.
It's unknown yet what effect, if any, the algae will have on fish populations, according to Sarah Spaulding, an ecologist with the U.S. Geological Survey and the EPA. But many are concerned.
"Once you remove (insects), young fish don't have anything to eat," said David Deen, a Vermont lawmaker who is a fishing guide and river steward for the Connecticut River Watershed Council. "Growth is slowed at best, and at worst they could starve to death."
In South Dakota, the algae is suspected of decimating brown trout populations in some spots.
Not only does rock snot threaten fish, but it's an unsightly nuisance. Fishermen complain that they can't cast their lines or they pull them up covered in gunk.
Jeff Williams, Arkansas' trout program supervisor, said out-of-staters were disappointed to find that the White River "wasn't as clean of a river as it used to be. The gravel is covered with didymo."
Once rare, the algae is perplexing scientists with the frequency of nuisance blooms.
"It seems to be something different this expansion and production of big masses in the U.S.," Spaulding said.
Where it once preferred high-altitude, low-nutrient rivers, rock snot has shown up in rivers in Missouri, Arkansas and Tennessee, raising questions about what triggers its growth. Dammed rivers provide a constant water flow for it to bloom, and drought and changes in sunlight may also play a role.
"We think there are other factors that we don't yet know about," said Spaulding.
In New Zealand, the algae has infested as many as 55 waterways on South Island, growing up to 7 inches thick. Scientists are trying a copper treatment to manage it, and anyone who knowingly spreads the algae is treated as a criminal. The penalty: up to five years in prison and/or a fine of up to $100,000.
For now, the algae is in its early stages in New England, forming nubby brown growths on rocks.
"I think all of the Northeast is tuned in to see what the effects will be, so they can start taking preventive measures," said Mary Russ, executive director of the White River Partnership.
Geez, gimme a break, I’m eating breakfast.........
What's the odds that the original version of this story blamed global warming outright, but raised the eyebrows of a skeptical editor?
“Insects could halt didymo growth
Feb 17, 2006 4:42 PM
Native insects could help halt the invasion of didymo, the algae clogging up New Zealand’s southern waterways.
Didymo has been found in nine South Island rivers.
Research at Otago University shows that the larvae of several native insects eat didymo and it is hoped they could keep some rivers in check.
Researchers hope further studies will reveal more about didymo and its place in the food chain.”
Using genetic engineering, create a variety of zebra mussel that likes to eat the stuff.
Oh, eeeeeek! Another ecological armageddon is descending on us! Where’s Algore to save us????
This stream bed is covered with an introduced invasive algae called Didymo. Image Copyright New Zealand Game and Fish.
That really is nasty looking
ok, translation plz
Usually any story about horrific anti-matter gets one pretty quick.
Thanks, you found a longer version.