A measure of how many organisms are found in a given area. Measure of diversity between similar ecosystems that takes species richness and abundance into accoun

A graph of the number of species observed in relation to the number of individuals sampled. The more samples you take, the less new species you see.

The number of different alleles possessed by a species

The number of different species present in a particular ecosystem

Living parts of an ecosystem

The number of species in a given area. It becomes more accurate as more samples are taken as shown by species accumulation curve.

A measure of the number of individuals of a particular species in relation to the total number of individuals of all species in that area.

A square frame used for sampling in field work.

Assemblage of different populations that live together in a defined area

A measure of how many organisms are found in a given area

The variety of ecosystems within a given region or biome.

A group of ecosystems with similar climates and organisms and which extend over a large area. Can be terrestrial, marine or freshwater

Non-living components of an ecosystem e.g. climate, substrate, temperature, salinity, light intensity, nitrogen content in soil, pH, oxygen, wind speed