EE34

Question 1

What is the LPI?

Answer 1

living planet index

Question 2

What are the catagories of the red list

Answer 2

extinct (EX)
extinct in the wild (EW)
Critically endagered (CR) >90% in 10 yrs/ 3 generations
Endangered (E) >70% in 10 years/3 generations
Vulnerable (VU) >50% in 10 years/ 3 generations eg. hippo
Near threatened (NT)
Least Concern (LC)
Data deficient (DD)
Not evaluated (EE)

Question 3

What are 2 ways of measuring range of size?

Answer 3

extent occurance - join dots of habitat so encircle general area
area of occupancy - like a grid with dots
subset of eoo and acknowledges that there are holes in distance of species with ee

Question 4

What is PVA?

Answer 4

population viability analysis
CR >50% risk of extinction in 10years/3 generations
EN > 20% risk of extinction in 20 years/ 5 generations
VU > 10% risk in 100 years

Question 5

what percentage of organism types are threatened with extinction?

Answer 5

11% birds
25% mammals
33% amphibians

Question 6

how many species are critically endagered?

so how many species will be extinct in a year

Answer 6

3879
20 species per year
assuming half will die out in 10 years

Question 7

What are the pros of the red list?

Answer 7

1. less data required
2. easy to understand
3. quick - practical
4. overprotective rather than under
5. could convert to probabilities

Question 8

What are the cons of the red list?

Answer 8

1. makes assumptions
2. inaccurate
3. still requires some data
4. species definition
   - could be larger variation between species
5. thresholds- just below or above, put in distinct categories.