Agricultural ecologists investigated the biodiversity of soil microarthropods under two different management systems: conventional tillage and no-till conservation agriculture.

Table 1 shows the abundance of five microarthropod species obtained from a soil core sample in the conventionally tilled field.

Table 1

Microarthropod species	Number of individuals ( $n$ )
Springtail	32
Oribatid mite	16
Predatory mite	8
Symphylan	16
Pauropod	8

State one advantage of using an index of diversity rather than species richness (the number of different species) to compare the biodiversity of these two agricultural soils.

The ecologists calculated the index of diversity ( $d$ ) using the following equation:

\sum \left(\frac{n}{N}\right)^2

where $n$ is the number of individuals of each species and $N$ is the total number of individuals of all species.

Use this equation and the data in Table 1 to calculate the index of diversity for this soil sample.

Agricultural ecologists investigated the biodiversity of soil microarthropods under two different management systems: conventional tillage and no-till conservation agriculture.

Table 1 shows the abundance of five microarthropod species obtained from a soil core sample in the conventionally tilled field.

Table 1

Microarthropod species	Number of individuals ( $n$ )
Springtail	32
Oribatid mite	16
Predatory mite	8
Symphylan	16
Pauropod	8

State one advantage of using an index of diversity rather than species richness (the number of different species) to compare the biodiversity of these two agricultural soils.

The ecologists calculated the index of diversity ( $d$ ) using the following equation:

\sum \left(\frac{n}{N}\right)^2

where $n$ is the number of individuals of each species and $N$ is the total number of individuals of all species.

Use this equation and the data in Table 1 to calculate the index of diversity for this soil sample.

Genetic information, variation and relationships between organisms

Question 1

Table 1

Markscheme

Genetic information, variation and relationships between organisms

Question 1

Table 1

Markscheme

Genetic information, variation and relationships between organisms

Question 1

Table 1

Genetic information, variation and relationships between organisms Questions

Genetic information, variation and relationships between organisms

Question 1

Table 1

Genetic information, variation and relationships between organisms Questions