Pesticides Travel 100 Miles to Poison Mountain Frogs

Humans do not operate in a vacuum. Everything in this world is connected. Every action we take has a consequence, even though it might not be obvious, or occur in the same place.

Nothing reinforces this more than a recent report that found that remote ponds in the Sierra Nevada mountains are contaminated with pesticides from up to 100 miles away in California’s Central Valley, which is hurting the native frog population.

According to U.S. Geological Survey researchers, trace amounts of agricultural chemicals are making their way over long distances, infiltrating national parks and other public lands where wildlife are supposed to be relatively safe from the outside world.

The study, published recently in Environmental Toxicology and Chemistry, examined pond-breeding frogs living in high elevation areas that are downwind of California’s highly agricultural Central Valley. Analysis of frog tissue, pond water and sediment revealed the presence of 10 distinct chemicals, including residues of DDT, an insecticide that has been banned for more than 40 years.

“Two fungicides, pyraclostrobin and tebuconazole, and one herbicide, simazine, were the most frequently detected pesticides in tissue samples,” states the study abstract. “Significant spatial differences in tissue concentration were observed, which corresponded to pesticide use in the upwind counties.”

Despite what the agricultural industry might want us to believe, the impact of pesticide use is not limited to lands and waterways immediately surrounding the application site. Soil,water and wildlife living up to 100 miles away can still suffer the consequences of the heavy use of these toxic chemicals.

Over the past decade, scientists have noted an alarming decline in U.S. amphibian populations. According to a study published earlier this year, researchers were baffled to learn that “even the species of amphibians presumed to be relatively stable and widespread are declining. And these declines are occurring in amphibian populations everywhere, from the swamps in Louisiana and Florida to the high mountains of the Sierras and the Rockies.”

Current research seems to be the beginning of an answer to the mysterious disappearance of these animals. ”Documenting the presence of environmental contaminants in amphibians found in our protected federal lands is an important first step in finding out whether the frogs are experiencing health consequences from such exposure,” says Patrick Kleeman, a USGS amphibian ecologist who collected the frog samples, in a press release. “Unfortunately, these animals are often exposed to a cocktail of multiple contaminants, making it difficult to parse out the effects of individual contaminants.”

Image via USGS


Jim Ven
Jim Ven2 years ago

thanks for the article.

Patti Ruocco
Patti Ruocco3 years ago

Men need to stop playing God--we consistently fail...and all of creation suffers from our idiocy... and to Kyle above--we are not SUPPOSED to have 100% yields every year--seasons change and stuff happens and what what us resilient is not raping the world around us, but adjusting to what each year holds...and if some years there is less profit and less food--so be's not all about humanity--that attitude is destructive at all times...

Fi T.
Past Member 3 years ago

The human are suffering as well

Gita Sasi Dharan
Gita Sasi Dharan4 years ago

Thanks for the opportunity to sign.

Mark D.
Mark D.4 years ago

The list of toxic felons includes Monsanto, Bayer, Dow, Dupont, Syngenta (a Canadian company.. of course Canada is involved in all things evil). The managers of these companies should be in prisons for life

Kyle N.
Kyle N4 years ago

Those 2 fungicide classes are needed to get a crop if weather conditions warrant their use. various leaf diseases can cut yields by 30% to completely wiping out entire crops. The biggest impact to amphibians is the increase of parasites that flourish in warmer weather which infect amphibians in the nymph stage.

Carrie-Anne Brown

signed, thanks for sharing :)

David V.
David V4 years ago

Humans at it again.....humans are the cause of all the extinctions

Claudia Cavallo
Claudia Cavallo4 years ago

Petition signed

Lyn Smith
Lynelle Romaine4 years ago

Its too bad when you can't be safe in the mountains from pesticides and poisons. Poor frogs.
Mankind will kill anything they come in contact and what they don't come directly in contact with they still find a way to spread their poison.