Measuring Diversity

Assessment to test for the monitoring environmental change, damage or the success of conservation effects

Extreme Environments

Species Diversity is low in extreme environments which are dominated by abiotic factors (non-living factors such as temperature, pH etc) where there is a population that may fluctuate drastically

Species Diversity

Species diversity is the number of different species and the number of individuals of each species within any one community

It is more useful to measure the species diversity compared to the species richness due to it focusing more on the amount of induvial in a species rather than just how many species there are.

Diversity and the Ecosystem

Ecosystems that undergo abiotic factors may cause a low-level organism in the food change to be unable to produce food for the next trophic level.

In a diverse ecosystem, the higher trophic level can change to another food course which is available, however in a low diversity ecosystem, another food source may not be available

Index of Biodiversity

 

Structure

 

N = total number of all organisms

n = Population size of the particular species

e.g.

Species

Number of individuals seen

Standard Deviation

n x (n-1)

Magpie

11

11 x 10 = 110

Black Headed Gull

4

4 x 3 = 12

Crow

4

4 x 3 = 12

Blackbird

1

1 x 0 = 0

Starling

37

37 x 36 = 1332

Sparrow

7

7 x 6 = 42

Total

64

1508

d = 1508

64 (64-1)

d = 0.374

The closer the value is to 0, that means there is infinite diversity, whereas closer to 1 means there is no diversity.