Biodiversity

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 C
ommercial 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
Knowledge on
Density
Geogr. Distr.
Taxa categories
Information for site evaluation conservation
measures (RAP approach)
4
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