Pesticides Contaminating Critters in California's National Parks
Pesticides from California's valley farms are collecting in the tissues of a singing treefrog that lives in pristine national parks, including Yosemite and Giant Sequoia, a new study finds.
The chemicals include two fungicides never before found in wild frogs, said Kelly Smalling, lead study author and a U.S. Geological Survey (USGS) research hydrologist. The study was published today (July 26) in the journal Environmental Toxicology and Chemistry.
Adapting to Stress: Early Exposure Gives Amphibians Higher Tolerance To Pesticides
... As amphibians continue their downward spiral, ecologists struggle to understand the animals’ responses to the likely agents of their destruction, including habitat loss or disturbance, disease, climate change and contaminants. It’s extremely difficult to tease apart which of these factors, acting alone or in combination, are driving declines in any one region.
But a recent study from the lab of aquatic ecologist Rick Relyea, a professor of ecology and evolution at the University of Pittsburgh, shines a small ray of light on a very dark picture. In an earlier study, Relyea found that glyphosate (otherwise known as Roundup), an herbicide widely used to control weeds in agriculture, killed 98% of tadpoles in his study within three weeks and 79% of juveniles in just one day. But pesticides can also cause defects without killing. Maybe stresses that don’t kill offer enough of a cushion for individuals to cope with the stress until more enduring adaptations can emerge in a population.
With more than 500 pest species now resistant to the insecticides used against them, Relyea reasoned, maybe frogs, and other unintentionally exposed species, could adapt to these chemicals over time too.
Bat Disease Causing Fungus Found In State Park
|Updated WNS map with suspect counties in Baxter and Washington counties, Arkansas |
on 22 July 2013. Credit: Cal Butchkoski,PA Game Commission
The Arkansas Game and Fish Commission confirmed Monday that a sample of the fungus was found in a cave at Devil's Den State Park in Washington County, but officials say no bats in the area have shown symptoms of the disease. It's the second instance of the fungus showing up in Arkansas after samples were found at a privately owned cave in Baxter County.
UALR Public Radio
29 Jul 2013
Location: View locations in Arkansas, USA on Disease News Map - Map It
OTHER WILDLIFE HEALTH RELATED NEWS
- Duck deaths lead to lakes' closure at Floyd Lamb Park [Floyd Lamb Park, Nevada, USA Map It ]
- The Hazardous Life of the Wildlife Professional: An Interview with Dr. Michael Hutchins [National Geographic]
- Surveillance cameras monitor badgers in farms
- Wildlife Rescuers See More Animals, Less Money
- Buzzfeeds: the effects of colony collapse disorder and other bee news [Weekly analysis of the health status of bee populations]
- 3-D look at prion may help find cure to brain diseases, University of Alberta work shows
- Wildlife search for water amid drought [New Mexico, USA]
|A two-inch high frog appears to angle a leaf towards the direction of the downpour|
in Jember, East Java, Indonesia. Photo credit: Penkdix Palme/NTI
- Health risk from dead dolphin - appeal for information [United Kingdom]
- Six dolphins found dead at Jersey Shore [Find locations in New Jersey, USA on Disease News Map]
- Study to look at population, effect of syndrome on bats in Cape Breton [Nova Scotia, Canada]
- Fungal disease wiping out insect-eating bats [Canada]
- More birds test positive for West Nile Virus in western Wisconsin [View recent cases reported in the news in Wisconsin, USA on Disease News Map ]
- Six dead birds infected with West Nile virus found in East County [View recent cases reported in the news in California, USA on Disease News Map ]
- First Bird Found With West Nile Virus in Evanston [Evanston, Illinois, USA - Map It ]
- Crow tests positive for West Nile virus [Polk Co., Wisconsin, USA - Map It ]
- Bird in Sawyer County tests positive for West Nile Virus [Couderay, Wisconsin, USA - Map It ]
- Dead crow with West Nile virus found in Midland County [Township of Hope, Michigan, USA - Map It ]
- Newly discovered marine viruses offer glimpse into untapped biodiversity
- Corals inspire new sunscreen filters
- Entomological Society of America launches 'Entomology Today Blog' [For anyone who shares a fascination for insects!]
- Fish-ear bones offer clues to health of ocean, species: Tiny ear bones of fish tell a big story about the environment