Sampling - A method for estimating the number of organisms in a particular area, Opportunistic sampling - Sampling the organisms easily available, Systematic sampling - Sampling species in different areas of the same habitat, Belt transect - Two parallel lines are marked in a habitat and samples are taken between them, Chance - This factor can be minimised by taking a large number of samples, Species Evenness - How similar the numbers of individuals of each species are in a community, Random Sampling - A method for collecting data which involves selecting the individuals by chance, Stratified sampling - Splitting populations into sub groups and then taking a random sample, Line transect - A line is run through a habitat and samples are taken at certain intervals along the line, Sampling bias - This factor can be removed by taking random samples, Species Richness - The number of different species living in a particular area, Biodiversity - The variety of living organisms present in an area,

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