Quantcast
Popular
Hine's Emerald Dragonfly. Missouri Department of Conservation

Escalating Use of Pesticides Harms Already Imperiled Aquatic Invertebrates

A new analysis published this month by U.S. Geological Survey scientists found pesticides at high enough concentrations to harm already imperiled aquatic invertebrates in more than half of 100 streams studied in the Midwest and Great Plains. The pesticide levels threaten species like the Hine's emerald dragonfly and the sheepnose mussel.

The U.S. Geological Survey study, published in the journal Science of the Total Environment, found an average of 54 pesticides in each stream in both agricultural and urban areas, spotlighting the ever-broadening contamination of waterways caused by the nation's escalating use of pesticides.


"This study exposes the hidden harm of our increasing addiction to pesticides," said Nathan Donley, a senior scientist at the Center for Biological Diversity. "When we see pesticides doing this kind of widespread harm to aquatic animals, we can be sure it has dangerous cascading effects on the entire web of life, including humans."

The analysis of 228 pesticide compounds in 100 streams over a 14-week period in 2013 documented the most complex pesticide mixtures yet reported in U.S. water samples. The waterways included in the study are in Michigan, Ohio, Indiana, Illinois, Wisconsin, Missouri, Iowa, Minnesota, Kansas, Nebraska and South Dakota.

Surprising among the findings was that the concentrations and incidences of some pesticides, including glyphosate—the active ingredient in Roundup—imidacloprid and 2,4-D, were higher in urban waterways than in agricultural settings.

At least one pesticide in more than half of the 100 streams sampled in the Midwest exceeded a toxicity threshold predicted to cause harm to aquatic insects and other stream organisms, ranging from acute effects in 12 streams to chronic effects in 41 streams.USGS

"The finding that many of these pesticides are more prevalent in urban waterways than in rural streams shows the escalating risks of dumping millions of pounds of chemicals on the landscape every year," said Donley. "We simply can't keep pretending it's safe to spray more and more poisons on our fields, gardens and waterways."

The analysis comes as a federal court in California is considering a lawsuit filed by conservation groups, including the Center for Biological Diversity, urging common-sense measures to prevent dangerous pesticides from harming endangered species like California condors, black-footed ferrets, arroyo toads, Indiana bats and Alabama sturgeon. Evaluations from the U.S. Environmental Protection Agency clearly show that imperiled wildlife continue to be threatened by pesticides.

The study is the first of five regional assessments by U.S. Geological Survey scientists of pesticide pollution of streams. The others regions are the Southeast, the Pacific Northwest, the Northeast and California.

Show Comments ()
Sponsored

One Million Trees Pledged to 'Trump Forest' to Offset President's Anti-Climate Agenda

Trump Forest—a global reforestation project aiming to offset President Trump's anti-climate policies—has reached 1 million trees after thousands of pledges from around the world.

Trump Forest was launched just under a year ago after POTUS announced he was pulling the U.S. from the Paris agreement.

Keep reading... Show less
The San Francisco Projection Department on Market Street with the #ExxonKnew campaign. Peg Hunter / Flickr

Time’s Up for California AG Becerra to Investigate #ExxonKnew and Prove He’s a Real Climate Leader

By May Boeve

With Trump and fossil fuel executives in the White House, any shot of powerful and lasting protections for our climate and communities will come from our cities and states. That's why it's so troubling that in California, one of the most progressive places in the U.S., current state Attorney General Xavier Becerra is failing to stand up to ExxonMobil and its ilk.

Keep reading... Show less
United Nations Development Programme

Climate Change, Conflict Leave 224 Million Undernourished in Africa

An official with the United Nations' Food and Agriculture Organization (FAO) warns that climate change and conflict are leading to food insecurity for millions of people living in Africa.

"Undernourishment appears to have risen from about 21 percent to nearly 23 percent between 2015 and 2016," Bukar Tijani, FAO's assistant director general for Africa, said Monday at a conference in Sudan.

Keep reading... Show less
Adventure
iStock

A Stargazer’s Guide to Protected Dark Skies

By Sabine Bergmann

For millennia, human beings have gazed into the firmament and been awed by the thousands of stars, galaxies, nebulae and other cosmic wonders visible to the naked eye. But in recent generations, much of humanity has become divorced from these marvels. Today, at least 80 percent of people living in the United States and Europe are so inundated with light pollution that they can't even see our own Milky Way, let alone our neighboring galaxies like Andromeda.

Keep reading... Show less
Sponsored
Shutterstock

Contaminated Cosmetics Pose Growing Risk to Consumers

By Scott Faber

A rash of product recalls, government warning notices and contaminated cosmetics may finally push Congress to give our broken cosmetics law a makeover.

This month, a key Senate committee announced a bipartisan plan to consider cosmetics reform legislation this spring and work for its passage by the full Senate this year.

Keep reading... Show less

America’s Cities Are the Vanguard for a Sustainable Future

By Henry Henderson

In the absence of federal leadership on climate change, America's cities have become the vanguard of the country's efforts to create a sustainable future. Recently, 233 mayors from 46 states and territories, representing 51 million residents across the country, have signed an open letter opposing the repeal of the Clean Power Plan (CPP), the nation's most comprehensive strategy to combat climate change.

Keep reading... Show less
Sponsored
Popular

Giant Sloth Fossils, Mayan Relics Discovered in World's Largest Flooded Cave

Archaeologists exploring the world's largest flooded cave—discovered last month just outside of Tulum, Mexico—have found an impressive treasure trove of relics.

The vast, 216-mile cave actually connects two of the largest flooded cave systems in the world, the 164-mile-long Sistema Sac Actun and the 52-mile-long Dos Ojos system. Aside from an extensive reserve of freshwater and rich biodiversity, the cave also contains an 11-mile-long, 66-food-deep cavern dubbed "the mother of all cenotes." Cenotes are natural pits, or underwater sinkholes, that are often holy sites in ancient Mayan culture.

Keep reading... Show less
A comet may have brought the mammoths to extinction. Royal Tyrell Museum in Drumheller, Alberta / Dave Smith / Flickr

The Day a Comet Set the Earth on Fire: Scientists Find Evidence in Ancient Ice Cores

By Tim Radford

Think of it as the day a comet set the earth on fire. Researchers have evidence of widespread and devastating forest fires around half the world—a blaze to blot out the light of the sun—and all of it at a geological boundary called the Younger Dryas, 13,500 years ago.

The evidence, they say, supports the hypothesis that planet Earth sailed through a cloud of shattered cometary dust and stones, and the atmospheric violence that followed was enough to set light to accumulated forest timber, peat and grasses across the Americas, Europe and western Asia.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!