The state of biodiversity

Question 1

Why was the Red List updated in 1990?

Answer 1

It was informal, easy to challenge; subjective, varied between groups

Question 2

What are the categories of the Red List?

Answer 2

1. Data defficient

2. Scale of exinction risk

Question 3

What are the criteria within scale of extinction risk?

Answer 3

A. Population reduction
B. Small distribution and fragmentation
C. Small population and decline
D. Very small or restricted population
E. Quantitative analysis

Question 4

What are the pros of the Red List?

Answer 4

• Combination of lots of criteria to allocate categories

- Easy to use and understand

Question 5

What are the cons of the Red List?

Answer 5

• Inaccurate data
• Single species focus
• Threshold values - where do you draw the line?
• Would it be better to think on a habitat/population scale?

Question 6

What is the Red List Index?

Answer 6

For species that have been assessed multiple times

Question 7

What are the threatened extinction values for birds, mammals and amphibians?

Answer 7

Birds = 11%
Mammals = 25%
Amphibians = 33%