Why do marmots hibernate in mountain ecosystems?

Marmots hibernate in mountain ecosystems primarily as an evolved survival strategy to bypass the harsh winter months when food supplies become scarce. In temperate mountain regions, the growing season is brief, and during the long winter, temperatures remain below freezing, making it impossible for these vegetarian rodents to find sufficient vegetation to sustain their metabolism.123

By entering a state of deep hibernation, marmots undergo complex physiological changes, including a dramatic reduction in heart rate, respiration, and body temperature, which allows them to survive on fat reserves accumulated during the summer and early fall. This process enables them to conserve energy when environmental conditions are too extreme for active foraging. While hibernation is a precarious method of survival, it is highly effective for species living in environments where they would otherwise face starvation or the inability to maintain their metabolic needs during the winter.1425