A line along which organisms can be sampled in ecological studies. Particularly useful in ecosystems such as sea shores and sand dunes where abiotic conditions and species vary across the area being studied.

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

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

The study of inter-relationships between organisms & their environment This environment includes living (biotic) factors (e.g. competition & predation) & non-living (abiotic) factors (e.g. temperature & rainfall).

Differences between organisms of the same species

Competition between organisms of the SAME species e.g. for food or mates

When using a quadrat to estimate population size, we use a random number generator to avoid what?

Give two examples of abiotic factors

When using a quadrat to estimate population size, we take many samples to ensure that our data is what?

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

All organisms of all populations in an ecosystem

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