Freshwater Ecosystems

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Drinking Water — Where It Comes From

Surface water — like lakes, rivers, and reservoirs — is one major source of our drinking water. Groundwater is another. The surface water comes from precipitation, like rain and melting snow and ice. Surface water moves over land to collect in lower areas, so it can contain chemicals it absorbs along the way. Some cities, like Los Angeles and […]

March 6th

Ban Atrazine with Dr. Tyrone Hayes

Amphibians as a group are declining in numbers. A number of reasons are behind this decline. Among those reasons is agricultural pesticide and herbicide use. Dr. Tyrone Hayes has been on the front line working against atrazine use in the United States.

August 28th

The Survival of the Earth Depends on Frogs

Healthy frogs means healthy humans. Jean-Marc Hero, a vertebrate ecologist specializing in conservation biology of amphibians, biodiversity assessment and monitoring, and conservation physiology explains that the survival of the Earth depends on frogs. The survival of frogs depends on humans.

Today, there are more seven thousand species of amphibians in the world – more than six thousand of those species are frogs. With so many frogs, how can the survival of the planet depend on them? Well, in lots of ways.

June 25th

“You Can’t Stop the Rage”: An Interview with Dr. Tyrone Hayes

Dr. Tyrone Hayes’ story reads like a movie script. Originally from a segregated town in South Carolina, the young African-American studied tadpoles in his yard and later won a scholarship to Harvard. He then became the second-youngest tenured professor in the Integrative Biology Dept. at UC-Berkeley. While doing research on the effects of atrazine for the chemical company Novartis (now owned by Syngenta), Hayes discovered that the popular pesticide causes chemical castration and feminization in frogs and hormonal disruption in humans that can lead to infertility and breast cancer.

January 28th