2 - Species diversity

Question 1

Species diversity formula

Answer 1

Species richness – the number of species in a community

Question 2

Species diversity

Answer 2

Relative abundance of species in the community
Combining species richness and evenness

Question 3

True diversity – effective number of species

Answer 3

The number of equally abundant species that would give the
observed diversity metric

Question 4

β diversity

Answer 4

Species compositional turnover
between communities

Question 5

Jaccard coefficient

Answer 5

a / (a + b + c)
a = shared species
b = species only in C1
c = species only in C2

Question 6

Sorenson coefficient

Answer 6

2a / (SC1+SC2)
a = shared species
SC1 = species richness of C1
SC2 = species richness of C2

Question 7

CqN

Answer 7

general overlap measure
(best relative compositional
similarity index)

Question 8

Morisita-Horn indices

Answer 8

Measure the probability that individuals drawn one from each vector will belong to different species, relative to drawing from each vector separately.

Question 9

β diversity

Answer 9

= γ diversity / α diversity
- Effective number of unique communities in the region