00:04
All right, so hopefully you've heard of the term invasive species, but maybe you're not super familiar with it.
00:10
An invasive species is any type of species that moves into an ecosystem that it is not native to.
00:18
It ends up in an ecosystem that it is not from, and usually is due to some type of human activity.
00:25
So i want to look at real invasive species and see how it could affect the organisms within an ecosystem.
00:35
Back in the day, the south american cane toad, which was from south america, was taken to australia to eat pests off of plants.
00:44
And what happened was the toads actually couldn't reach the top of the plants to eat the pests, and they began reproducing, and then they began to move out into the rest of the open country within australia, and basically they have begun to take over.
01:00
And so let's say this cane toad moves into these ecosystems.
01:03
Well, it begins to eat food that the other toads and frogs might eat.
01:08
But since it might be quicker or might outnumber them because they don't have any natural predators, they begin to eat all the food.
01:16
And so these other toads, their population begins to go down.
01:20
Well, let's say that these other toads are food for lizards.
01:24
And the south american cane toad produces a poison that makes them non -edible to these lizards.
01:30
And so because these other toads population is going down, the populations of these lizards would go down as well...