Quantative features of populations
- Created by: hannah kingham
- Created on: 04-04-16 22:32
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- Quantitative features of populations
- Species density: measure of the number of species per unit area
- Species Density
- Measure of how often a certain species is recorded in a sample (%)
- if a species occurs 4 out of 10, than its 40%
- Percentage plant cover
- measure of the proportion of ground that is covered by vegatation
- divided by different species
- method used depends on size of plants
- Grid quadrats
- Number of squares that is covered will be the percentage
- Point quadrats
- row of 10 metal rods
- every time a rod touches a species, its 10%
- Location
- should be placed using random or systematic sampling
- Bias if chosen by observation alone
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