Invasive Species Spread Photo Credit: Simon Stump.

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Invasive Species Spread Photo Credit: Simon Stump

Bell Ringer Find the slope of a line that goes through the points (4, -3) and (8, -1).

Bell-Ringer #2 What is an invasive species?

The Cane Toad, Bufo marinus Native to South and Central America, and as far north as Texas. Large (up to 2 kg). Very poisonous. Nocturnal. Voracious predators. Lay between 8,000-30,000 eggs at a time. Photo Credit: Simon Stump

Cane Toads in Australia Introduced in the 1930s to control pests, in Gordonvale (North East Australia). Have spread around Australia. Predators cannot survive their toxins. They are outcompeting native species. Photo Credit: Simon Stump

Images by Froggydarb at the English language WikipediaFroggydarb at the English language Wikipedia The Spread Across Australia

For today’s activity… You will use survey data to try to understand the spread of Bufo marinus in Australia. Photo Credit: Simon Stump