Which population in this food web would mostly likely be negatively affected by an increase in the mouse population?

An increase in the mouse population would likely negatively affect the populations of their predators, such as snakes or Birds of Prey. As mice become more abundant, these predators may experience heightened competition for food resources, leading to potential overexploitation and a decrease in their own population sizes. Additionally, if the mouse population increases significantly, it could lead to habitat degradation or resource depletion, further impacting these predator populations.