Endangered species, Animals that are close to extinction because of their low numbers., Habitat, A place where plants, animals and microorganisms live., Quadrat, A square frame of known area used for sampling the abundance and distribution of slow or non-moving organisms., Species abundance, The total number of individuals of one species (eg daisies) is recorded., Species richness, The number of different plant or animal species is recorded but not the number of individuals within a species., Species distribution, Where the organisms are found within an area, Random sampling, The placing of quadrats at random coordinates., Transect, A line created, for instance, with a tape measure, along which sampling occurs., Bias, Prejudice or favour shown for one person, group, thing or opinion over another.

Sampling an ecosystem

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