Spread of a Pest Population — Population Invasion

Length of habitat (km) 100

Number of habitat cells along the line.

Number of years 50

Establishment threshold 10

Front = first cell below this density.

Initial pest density 50

Dispersal rate (d) 0.2

Fraction dispersing each year.

Population growth rate 4

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Spread of the pest front over time

Cursor: X = –, Y = – Final front: – km Mean speed: – km/yr