Science Current Events | Science News | Brightsurf.com
 

New Study Is First to Show That Pesticides Can Induce Morphological Changes in Vertebrate Animals, Says Pitt Researcher

April 03, 2012
PITTSBURGH- The world's most popular weed killer, Roundup®, can cause amphibians to change shape, according to research published today in Ecological Applications.

Rick Relyea, University of Pittsburgh professor of biological sciences in the Kenneth P. Dietrich School of Arts and Sciences and director of Pitt's Pymatuning Laboratory of Ecology, demonstrated that sublethal and environmentally relevant concentrations of Roundup® caused two species of amphibians to alter their morphology. According to Relyea, this is the first study to show that a pesticide can induce morphological changes in a vertebrate animal.

Relyea set up large outdoor water tanks that contained many of the components of natural wetlands. Some tanks contained caged predators, which emit chemicals that naturally induce changes in tadpole morphology (such as larger tails to better escape predators). After adding tadpoles to each tank, he exposed them to a range of Roundup® concentrations. After 3 weeks, the tadpoles were removed from the tanks.

"It was not surprising to see that the smell of predators in the water induced larger tadpole tails," says Relyea. "That is a normal, adaptive response. What shocked us was that the Roundup® induced the same changes. Moreover, the combination of predators and Roundup® caused the tail changes to be twice as large." Because tadpoles alter their body shape to match their environment, having a body shape that does not fit the environment can put the animals at a distinct disadvantage.

Predators cause tadpoles to change shape by altering the stress hormones of tadpoles, says Relyea. The similar shape changes when exposed to Roundup® suggest that Roundup® may interfere with the hormones of tadpoles and potentially many other animals.

"This discovery highlights the fact that pesticides, which are important for crop production and human health, can have unintended consequences for species that are not the pesticide's target," says Relyea. "Herbicides are not designed to affect animals, but we are learning that they can have a wide range of surprising effects by altering how hormones work in the bodies of animals. This is important because amphibians not only serve as a barometer of the ecosystem's health, but also as an indicator of potential dangers to other species in the food chain, including humans."

For two decades, Relyea has studied community ecology, evolution, disease ecology, and ecotoxicology. He has authored more than 80 scientific articles and book chapters and has presented research seminars around the world. For more information about his laboratory, visit www.pitt.edu/~relyea/

University of Pittsburgh


Related Pesticides Current Events and Pesticides News Articles


In lab tests, the antimicrobial ingredient triclosan spurs growth of breast cancer cells
Some manufacturers are turning away from using triclosan as an antimicrobial ingredient in soaps, toothpastes and other products over health concerns.

Stanford researchers rethink 'natural' habitat for wildlife
Protecting wildlife while feeding a world population predicted to reach 9 billion by 2050 will require a holistic approach to conservation that considers human-altered landscapes such as farmland, according to Stanford researchers.

New evidence of suicide epidemic among India's 'marginalised' farmers
Latest statistical research finds strong causal links between areas with the most suicides and areas where impoverished farmers are trying to grow crops that suffer from wild price fluctuations due to India's relatively recent shift to free market economics.

East African honeybees are safe from invasive pests- for now
Several parasites and pathogens that devastate honeybees in Europe, Asia and the United States are spreading across East Africa, but do not appear to be impacting native honeybee populations at this time, according to an international team of researchers.

Significant baseline levels of arsenic found in soil throughout Ohio are due to natural processes
Geologic and soil processes are to blame for significant baseline levels of arsenic in soil throughout Ohio, according to a study published recently in the Journal of Environmental Quality.

First peanut genome sequenced
The International Peanut Genome Initiative-a group of multinational crop geneticists who have been working in tandem for the last several years-has successfully sequenced the peanut's genome.

Nanotube coating helps shrink mass spectrometers
Nanotechnology is advancing tools likened to Star Trek's "tricorder" that perform on-the-spot chemical analysis for a range of applications including medical testing, explosives detection and food safety.

Pesticides make the life of earthworms miserable
Pesticides are sprayed on crops to help them grow, but the effect on earthworms living in the soil under the plants is devastating, new research reveals: The worms only grow to half their normal weight and they do not reproduce as well as worms in fields that are not sprayed.

Vast gene-expression map yields neurological and environmental stress insights
A consortium led by scientists from the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) has conducted the largest survey yet of how information encoded in an animal genome is processed in different organs, stages of development, and environmental conditions.

Crop intensification and organic fertilizers can be a long-term solution to perennial food shortages in Africa
Farmers in Africa can increase their food production if they avoid over dependence on chemical fertilizers, pesticides and practice agricultural intensification - growing more food on the same amount of land - using natural and resource-conserving approaches such as agroforestry.
More Pesticides Current Events and Pesticides News Articles

Pesticide Drift and the Pursuit of Environmental Justice (Food, Health, and the Environment)

Pesticide Drift and the Pursuit of Environmental Justice (Food, Health, and the Environment)
by Jill Lindsey Harrison (Author)


The widespread but virtually invisible problem of pesticide drift--the airborne movement of agricultural pesticides into residential areas--has fueled grassroots activism from Maine to Hawaii. Pesticide drift accidents have terrified and sickened many living in the country's most marginalized and vulnerable communities. In this book, Jill Lindsey Harrison considers political conflicts over pesticide drift in California, using them to illuminate the broader problem and its potential solutions. The fact that pesticide pollution and illnesses associated with it disproportionately affect the poor and the powerless raises questions of environmental justice (and political injustice). Despite California's impressive record of environmental protection, massive pesticide regulatory apparatus, and...

The Pesticide Manual: A World Compendium

The Pesticide Manual: A World Compendium
by C. MacBean (Editor)


The sixteenth edition of The Pesticide Manual provides the most comprehensive information on active ingredients for the control of crop pests in the world. Completely revised and updated, the latest edition contains 1,436 profiles and over 2,600 products, details of 45 additional synthetic molecules and the first approvals under EU 2011 legislation.

Basic Guide to Pesticides: Their Characteristics and Hazards

Basic Guide to Pesticides: Their Characteristics and Hazards
by Rachel Carson Counsel Inc. (Author)


This work contains physical properties of over 700 pesticides and transformation products and contaminants. It can be used by the layman with minor questions or by the specialist needing in-depth references. Facts have been arranged so that one does not have to read through lengthy material.

The Pesticide Conspiracy

The Pesticide Conspiracy
by Robert Van Den Bosch (Author)


Professor van den Bosch of the University of California was one of the developers of Integrated Pest Management—the use of biological controls, improved pest knowledge and observation, and judicious application of chemicals only when absolutely necessary. His research often suggested that less or no pesticides should be applied, which made him the target of both open and clandestine attack from industry and government figures. In protest, he wrote this passionate account of what Ecology called "the ultimate social disaster of: evolving pesticide-resistant insects, the destruction of their natural predators and parasites, emergent populations of new insect pests, downstream water pollution, atmospheric pollution, the 'accidental' killing of wildlife and people, and the bankruptcies of...

Pesticides and Health: Myths vs. Realities

Pesticides and Health: Myths vs. Realities
by Dr Allan S Felsot (Author), The American Council on Science and Health (Author)


Year in and year out, agricultural pesticides have been the subject of considerable fear-mongering, leaving the typical consumer with the impression that these chemicals taint much of our food supply and are harmful to human health. In fact, just the opposite is closer to the truth. The published scholarly literature has failed to turn up evidence of adverse human health effects from use of modern pesticides in the real world. Furthermore, in light of the current economic perturbations, as well as the progressive severity of worldwide food shortages and the resulting malnutrition and spiking prices of basic food commodities, the claims that these pesticides pose a threat to human health are false, misleading — and dangerously irresponsible. In Pesticides and Health: Myths vs. Realities,...

Organic Pest Control: Organic Pesticides for Organic Gardening and How to Grow Clean and Healthy Food (How to Grow Food, Organic Gardening, Pest Control, ... food, Healthy Food, Natural Pest Control)

Organic Pest Control: Organic Pesticides for Organic Gardening and How to Grow Clean and Healthy Food (How to Grow Food, Organic Gardening, Pest Control, ... food, Healthy Food, Natural Pest Control)
by Digital Direct Publishing


This Amazon Bestseller will show you how to STOP Eating Toxic Chemical Pesticides Today!!!
You’re about to discover how to grow clean and healthy food without the use of harmful chemicals and toxins. If you want the best health possible for your family, ingredients are everything!! Growing your own vegetables is the perfect way to make sure you are eating food that is free of harmful chemicals and toxins. Even if you don't grow your own food, this book will help you with methods for removing pesticides from store bought foods.
Here Is A Preview Of What You'll Learn...
Common Garden Pests Preventative Pest Control MethodsOrganic Pest Control Spray RecipesOrganic Soil Treatments for Pest ControlHow to Remove Pesticides from store bought foodCompanion Crops that repel...

Food Systems in an Unequal World: Pesticides, Vegetables, and Agrarian Capitalism in Costa Rica (Society, Environment, and Place)

Food Systems in an Unequal World: Pesticides, Vegetables, and Agrarian Capitalism in Costa Rica (Society, Environment, and Place)
by Ryan E. Galt (Author)


Pesticides, a short-term aid for farmers, can often be harmful, undermining the long-term health of agriculture, ecosystems, and people. The United States and other industrialized countries import food from Costa Rica and other regions. To safeguard the public health, importers now regulate the level and types of pesticides used in the exporters’ food production, which creates “regulatory risk” for the export farmers. Although farmers respond to export regulations by trying to avoid illegal pesticide residues, the food produced for their domestic market lacks similar regulation, creating a double standard of pesticide use.

Food Systems in an Unequal World examines the agrochemical-dependent agriculture of Costa Rica and how its uneven regulation in export versus domestic...

The Pesticide Book

The Pesticide Book
by George W. Ware (Author)




Pesticides and Global Health: Understanding Agrochemical Dependence and Investing in Sustainable Solutions (Anthropology and Global Public Health)

Pesticides and Global Health: Understanding Agrochemical Dependence and Investing in Sustainable Solutions (Anthropology and Global Public Health)
by Courtney Marie Dowdall (Author), Ryan Klotz (Author)


This concise, accessible introduction to understanding agricultural chemicals and public health combines a broad synthesis on a global scale with rich ethnographic narratives on a human scale. Drawing on epidemiology, policy analysis, and social science research on the global commodity chain, the authors describe the system of global agrochemical dependence that constitutes a major threat to human health. Then they draw readers into the lush mountainsides of highland Guatemala, telling personal stories of farmers, their experiences with public health programs, their struggles against agrichemical dependence, and their innovations in sustainable agriculture. Finally, they show how this kind of qualitative, multi-level analysis holds practical lessons for public health. This engaging, brief...

Easy as 1-2-3 Growing Mushrooms Indoors "How to Quickly Grow Delicious & Healthy Mushrooms Free From Pesticides in the Comfort of Your Own Home at a Fraction of the Cost of Supermarkets!"

Easy as 1-2-3 Growing Mushrooms Indoors "How to Quickly Grow Delicious & Healthy Mushrooms Free From Pesticides in the Comfort of Your Own Home at a Fraction of the Cost of Supermarkets!"


Finally, an EASY 1-2-3 Way to Grow Mushrooms Indoors!
Organically Raise All of Your Mushrooms and Enjoy Years of Fresh Pesticide Free Delicious Mushrooms
I Will Show You Incredibly Simple Steps Using Common Materials to Growing Your Own Mushrooms over a Weekend!
I'm Going to Reveal to You All of the Secrets of Organic Mushroom Cultivation No Matter if You're a Beginner or an Avid Green Thumber

Are you looking to grow your very own mushrooms to provide you years of fresh and pesticide free mushrooms? Well, if you are then this is the beginners guide for you. In “Easy as 1-2-3 Growing Mushrooms” you’ll not only learn how to quickly and easily build a Mushroom farm, but you’ll also learn:

The entire process of growing mushrooms...

© 2014 BrightSurf.com