The range and variety of genes, species and habitats within a particular ecosystem

All organisms of all populations in an ecosystem

The population size of a species that can be supported by the ecosystem

A group of similar organisms that can reproduce to produce FERTILE offspring

Conditions in the environment that limit population size - these can be biotic or abiotic factors.

This describes how an organism fits into the environment. It describes what a species is like, where it occurs, how it behaves, its interactions with other species and how it responds to its environment.

A self contained area including the biotic (living) community and abiotic (non-living) components interacting with one another

Give two examples of abiotic factors

competition between organisms of DIFFERENT species e.g. for food

the category of living factors in the environment of an organism that affect population size

the non-living / physical part of an ecosystem that can affect population size

Two examples of biotic factors that affect the population size of an organism

a sampling area used for measuring the frequency or percentage cover of organisms (plants or slow moving organisms)