Final answer:
Bird populations on mountainsides are likely to respond to a warming climate by shifting their range uphill over generations, due to changes in habitat and resources. This can lead to range shifts and impacts on bird populations.
Step-by-step explanation:
As the climate warms, bird populations on mountainsides are likely to respond by shifting their range uphill over generations. The warming climate affects the habitat and resources that birds depend on, such as food availability and vegetation. Species adapted to higher elevations may find their habitat crowded by lower-elevation species moving uphill, and some climates may completely disappear. These changes can lead to range shifts and impacts on bird populations.