Climate change tipping points for populations, not just species: Survival, reproduction of thousands of arctic and alpine plants measured

As Earth's climate warms, species are expected to shift their geographical ranges away from the equator or to higher elevations. While scientists have documented such shifts for many plants and animals, the ranges of others seem stable. When species respond in different ways to the same amount of warming, it becomes more difficult for ecologists to predict future biological effects of climate change -- and to plan for these effects.

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