an increase in the
number of
individuals of a
species over what
its ecosystem can
sustain
Overpopulation
O
O
B
B
G
G
I
I
B
B
N
N
I
I
G
G
B
B
I
I
O
O
I
I
B
B
N
N
G
G
N
N
G
G
I
I
O
O
N
N
G
G
O
O
B
B
O
O
Size:
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Start
O
O
History
Start
O
O
B
B
G
G
I
I
B
B
N
N
I
I
G
G
B
B
I
I
O
O
I
I
B
B
N
N
G
G
N
N
G
G
I
I
O
O
N
N
G
G
O
O
B
B
O
O
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