The range and variety of genes, species and habitats within a particular ecosystem
Biodiversity
Conditions in the environment that limit population size - these can be biotic or abiotic factors.
Limiting factors
The population size of a species that can be supported by the ecosystem
Carrying capacity
a sampling area used for measuring the frequency or percentage cover of organisms (plants or slow moving organisms)
Quadrat
When using a quadrat to estimate population size, we use a random number generator to avoid what?
Bias
When using a quadrat to estimate population size, we take many samples to ensure that our data is what?
Representative of the population
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.
Belt transect
A method of estimating population size of motile organisms by marking a number of them, releasing them & then counting the number of marked organisms in a second sample
Mark, release & recapture
Give two assumptions made when using the mark, release, recapture technique to estimate population size
No immigration / migration (Ignore ref to emigration);
No reproduction (Ignore ref to death);
Idea of mixing;
Marking does not influence behaviour
