1. The squirrels of greenfield park
Populations
The squirrels of greenfield park

2. 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.

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

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

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

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

7. water

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

9. 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.

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

11. 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

12. = 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 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 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?
________________________

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