The Varying Success Of Invaders (Williamson)

Question 1

What is the tens rule?

Answer 1

1 in 10 of those imported will appear in the wild

Question 2

In Britain what is the exception to the tens rule?

Answer 2

Non native crops, 71 out of 75 non native are now naturalised

Question 3

Where does the tens rules not apply?

Answer 3

Where there has been selection to counter it

Question 4

In islands how many of the native birds are established?

Answer 4

50%

Question 5

Why are Island mammals an exception?

Answer 5

Some islands lack key animals in the food chain meaning the introduction of a species that fits well into the food chain is almost certain to become established