The New York Times  reports

For decades, the core mission of the Park Service was absolute conservation. Now ecologists are being forced to do triage, deciding what to safeguard — and what to let slip away.

For more than a century, the core mission of the National Park Service has been preserving the natural heritage of the United States. But now, as the planet warms, transforming ecosystems, the agency is conceding that its traditional goal of absolute conservation is no longer viable in many cases.

Read more at What to Save? Climate Change Forces Brutal Choices at National Parks – The New York Times