That's not countable, but A LOT.
both will experience population drops. if there is no grass, there will be less insects, less mice to eat the insects, and less owls to eat the mice.
175 mice in the world
Yes, If there are 2 or more mice. In order to make a population there has to be 2 or more of the same type of an organism.
The human population helped the mice population in several ways. The first would be eliminating the wolf population, since the primary diet of wolves are mice. We've also helped them by the sheer waste of food in the U.S. since mice feed off the garbage we throw away.
the population of owls decreases
the population of owls decreases. (Apex)
a disease that kills a large portion of wolf population affects the mice population because if a lot of the wolf died from the disease, they wouldnt eat deer so then there are more deer. if there are more deer, they need to eat more mice. so mice population would go down a lot.
death
Stabilizing selection
A Genetic bottleneck
Population
The population of white mice may be growing due to factors such as better adaptation to their environment, reduced predation, or availability of resources that favor their survival. In contrast, the population of brown mice could be declining due to increased predation, competition for food, or environmental changes that disadvantage them. Additionally, genetic factors or diseases affecting the brown mice could also contribute to their decline. Overall, these dynamics reflect the complex interactions between species and their habitats.