1. Biodiversity – probability (a chance) of meeting individuals
belonging to the different species
The higher probability – the higher diversity

2. Factors influencing the probability
Number of individuals
(density)
Number of taxa
Threatened
Endemics
Relicts
Rare
Bioindicators
Commercial
Predators
Herbivores
List of taxa:
Sp. 1
Sp. 2
Sp. 3
Sp. 4
Sp. 5
Sp. 6
Sp. 7
Sp. 8
Sp. 9
Natural geogr. distr.
Historical reasons

3. Information for site evaluation & conservation measures
Knowledge on:
Density
Geogr. Distr.
Taxa categories
Information for site evaluation & conservation measures
(RAP approach)

4. Information management, protection & conservation measures
Knowledge on:
Density
Geogr. Distr.
Taxa categories
Monitoring system
Information management, protection & conservation measures

5. How to identify (measure) biodiv.
(COP/3/13, p. 10 – should be transparent, pragmatic, scintific principals)
Need to know:
taxa numbers
- taxa density
Biodiv. Index (p. 3 CBD/SBSTTA/3/7
Nor possible to identify all
Not possible to give density of all taxa
(p. 6 & 10 BBD/COP/3/13
Not possible to estimate biodiv. Of the whole ecosystem

6. What possible? To measure biodiv. of certain taxocenosis, eg.
Chironomids of sandy lake sediments, or:
Diversity of particular
groups, like:
Molluscs
Hirudinea
Turbellaria
Gastrotricha, etc
Other groups depending on:
-access to the id. keys
-specialists available
-time
-money
Best known – indicatory
Groups – RBA approach
p. 36, 37, 39, 42 CBD/COP/3/13
With time better and better biodiv.
evaluation