"Eighty percent of the state's 129 native fish species are extinct or imperiled," according to a new study from the Public Policy Institute of California. How to fix that? The answer might surprise you—the study’s authors propose allowing invasive species to go extinct in order to facilitate a balancing act between preserving a high quality water supply with a habitable ecosystem for other, less invasive, species of fish. Should we let some species die off to save others? Biologists confront the prospect of triaging the fate of the earth’s creatures.
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