OCR AS Biology-Biodiversity
- Created by: LegendofZelda
- Created on: 09-05-18 14:47
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- Biodiversity
- Definitions
- Species
- A group of indiviudual organisms who are able to produce viable offspring
- Habitat
- The type of environment where organisms live
- Ecosystem
- All biotic and abiotic factors which make up an area
- Biodiversity
- The variety of living organisms present within an area
- Species richness and eveness
- Richness
- Number of different species in a particular habitat
- Eveness
- The comparison of the number of individuals of a species in a community
- Richness
- Species
- Types of biodiversity
- Genetic
- Genetic variation between individuals belonging to the same species
- What causes them to look alike due to alleles
- Genetic variation between individuals belonging to the same species
- Species
- The diferences between species
- Habitat
- The range of different habitats in which different species live
- Genetic
- Measuring biodiversity
- Sampling
- Taking measurments of a limited number of individal organisms present in a particular area
- Random and non-random
- Random-selecting individuals by chance
- Gives each individual an equal likelihood of selection
- Non-random-sample is not selected at random
- Sytematic
- Different areas within habitat are identified and sampled separately
- Stratified
- Populations divided into strata based on characteristics
- Random samples taken from each strata
- Opportunistic
- Uses organisms that are conveniently available
- Not very representative of the population
- Sytematic
- Random-selecting individuals by chance
- Sampling
- Species richness and eveness
- Richness
- Number of different species in a particular habitat
- Eveness
- The comparison of the number of individuals of a species in a community
- Richness
- Simpson's Index of Diversity
- D = 1-[?(n/N)2]
- D=diversity score
- n=number of individuals of a particular species
- N=total number of individuals
- Definitions
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