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A week before researchers, land managers and politicians convene for the annual Lake Tahoe Summit, scientists from University of Nevada, Reno and the Desert Research Institute gathered on the shores of Incline Village to highlight recent work, including a newly discovered threat to native macro invertebrates living on the lake bottom.
Researcher Annie Caires with the UNR research faculty get ready to demonstrate how researchers take a water column sample using a van dorn water sampler at Lake Tahoe on Monday.
Tahoe's tiny critters fast Saucony Shadow 6000 Purple
These are fingernail sized creatures such as stoneflies, worms and bottom shrimp and in places, their population is crashing. Numbers have dropped between 80 and 99 percent from levels recorded in the 1960s.
"We think it's likely both Reebok Deep Range Low
Further research is needed to determine the abundance and diversity of the newly discovered creatures but it's clearly possible the same factors causing the population crash of Tahoe's better known bottom dwellers might impact these ones as well, Baguley said.
)Some of the tiny critters living on the bottom of Lake Tahoe's shallows are disappearing at an alarming rate and the danger could extend to newly discovered animals as well, scientists said Monday.
"They are disappearing. It's unprecedented. It's absolutely dramatic," said Sudeep Chandra, a fresh water science expert at UNR.
"We've been investigating a community at Lake Tahoe that's never been investigated before," UNR biologist Jeff Baguley said Monday.
could also reduce the lake's famed clarity by limiting its ability to process nutrients which can fuel algae growth, Chandra said.
If numbers of invertebrates long known to exist in Lake Tahoe are showing dramatic drops, the Saucony Freedom Iso same problem could affect tiny animals newly discovered in the lake's waters, scientists said.
The dramatic drop in native invertebrate populations was discovered during routine bottom sampling and came as a complete surprise, Chandra said. He and colleagues had no reason to suspect the population crash was occurring.
"There is a strong possibility we will lose these species in the future," Chandra said.
"While some claim to have seen the mythical Tahoe Tessie, none until now have seen these non mythical microscopic creatures of the sand," said a UNR release regarding the discovery.
Over the past two years, scuba diving researchers have discovered four new species of tiny animals in the waters off Tahoe's south shore. These shrimp like organisms, about 1 millimeter long or smaller, are called copepods.
One of them to be scrutinized in a study to be published later this year has been scientifically dubbed "Attheyella tessiae" in a nod to Tahoe Tessie, the Loch Ness Monster like creature some allege to have seen in the lake.
Research concludes the lake bottom dwelling invertebrates are vanishing at rates of 80 to 99 percent.
Exactly why it's happening is unknown. One possibility is that the aquatic plants the animals need for habitat are declining, possibly due to a loss in water clarity experienced in recent years in Tahoe's shallow, near shore environment. Another is that those same plants are being consumed by non native species such as crayfish grazing on the lake bottom. Crayfish may also be eating the tiny animals.
"We don't even know if some of these things might have already disappeared," Baguley said. "It's possible some could already be gone from the lake.".
Loss of the affected species could seriously impact the lake's food web and natural ecosystem. It Saucony Omni 13
factors," Chandra said.
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