The squirrels of greenfield park Populations The squirrels of greenfield park

population Populations are all of one kind of species that live in the same place at the same time. For example all the squirrels in Greenfield Park.

competition When a bunch of organism live in the same place they compete with each other for: Space

Nests They have leaf nests in trees to keep them warm when they hibernate and have their babies

Food Squirrels will eat just about anything Food Squirrels will eat just about anything. But there still has to be enough to go around

Mates They have a courtship before they choose the right mate to have babies

water

Places to hide So you can get away from predators stash you food for the winter so you can sleep safely

Habitat There are several things that affect the size of the population of squirrels in Greenfield Park. All the things on the previous page provide a habitat or a place to live for the squirrels.

Two events increase the population: The number of squirrels that move in from Brossard Immigration The number of squirrels that are born Birth rate

Two events decrease the population: The number of squirrels that leave and go to St. Hubert. Emigration The number of squirrels that die Death Rate

= 10 squirrels Year 1: How many squirrels are their in the original population? _________ Year 2. If ten babies are born and five die, How many squirrels are left? ________________ Year 3 Start with the number in box 2. 10 more squirrels die. Five squirrels move out to St. Hubert. Five squirrels are born.   How many squirrels at the end of year 3? ______________ Year 4 Start with the number in box 3 20 squirrels move in from Brossard 20 babies are born 5 squirrels die 10 move to St. Hubert. How many squirrels in year 4? ________________________

After 4 years does the squirrel population increase decrease or stay the same?