[item#D8] (refer to the photo below) Are predator-prey relationships density-dependent or density-independent limiting factors? Explain.

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[item#D8] (refer to the photo belowAre predator-prey relationships density-dependent or density-independent limiting factors? Explain.

 

Isle Royale National Park on a remote island was established in 1940, and designated a
wilderness area in 1976. The only mode of transportation available is by boat or seaplane.
Moose first arrived at Isle Royale around 1900. The moose population tends to increase in
years with mild winters, early spring green-up, abundant winter forage, low wolf numbers
and low levels of tick infestation. Wolves first arrived at the island on an ice bridge from
Canada in a940. Disease has also influenced the wolf population. Between 1980 and 1982,
the wolf population declined from 50 to 14, due to canine parvovirus.
Predator Prey on Isle Royale
3000
60
2500-
- 50
2000
40
Number of
1500
30
Moose
1000
20
+ Number of
Wolves
500
10
1950
1960
1970
1980
1990
2000
2010
Years
Moose
SOAJOM
Transcribed Image Text:Isle Royale National Park on a remote island was established in 1940, and designated a wilderness area in 1976. The only mode of transportation available is by boat or seaplane. Moose first arrived at Isle Royale around 1900. The moose population tends to increase in years with mild winters, early spring green-up, abundant winter forage, low wolf numbers and low levels of tick infestation. Wolves first arrived at the island on an ice bridge from Canada in a940. Disease has also influenced the wolf population. Between 1980 and 1982, the wolf population declined from 50 to 14, due to canine parvovirus. Predator Prey on Isle Royale 3000 60 2500- - 50 2000 40 Number of 1500 30 Moose 1000 20 + Number of Wolves 500 10 1950 1960 1970 1980 1990 2000 2010 Years Moose SOAJOM
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