SciencePhoto: HT WorldYosemite's Rare Frogs Rebound After Trout Stocking Began in 1897
Yosemite National Park began stocking fishless lakes with trout in 1897, impacting native species like the Sierra Nevada yellow-legged frog. Researcher Roland Knapp documented a sevenfold increase in these frogs over 20 years, as reported in a 2016 study. The frogs, once common and vital to the ecosystem, had declined due to introduced fish but are now rebounding in the park's high-elevation lakes.
HT World·


