Summary
Summary - Biodiversity
- Module
- Biodiversity
- Institution
- OCR
In-depth notes on Biodiversity and Sampling in Biodiversity great for theory.
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Biodiversity SamplingWhat is biodiversity?
Biodiversity – a measure of the variation found in the living world.
Species – a group of organisms that can freely interbreed to produce fertile
offspring.
Habitat – where an organism lives.
Biotic factor – a living organism that shapes its environment.
Abiotic factor – a non-living part of an ecosystem that shapes its environment.
What are the levels of biodiversity?
Habitat biodiversity – the number of different habitats found within an area.
Species diversity – the number of species + abundance of each species that live
in a particular location
Species richness – a measure of how many different species are present.
Species abundance – the number of individuals of each species.
Species evenness – a measure of how evenly represented the species are.
Genetic diversity – variety of genes that make up a species.
Allele – different versions of genes.
How do you measure biodiversity?
Why do scientists not simply count every individual organism in a habitat?
- That would take a lot of time, so sampling is easier to be representative
of the population.
What is an estimate?
- an approximate calculation or judgement of the value, number, quantity,
or extent of something
What are the 4 main steps of all sampling techniques?
1. Identify the population.
2. Specify a sampling frame.
3. Specify a sampling method.
4. Determine the sample size.
Why do we repeat?
- To check if our results are similar or the same to make sure our results
are correct and reliable and to point out any errors or anomalies.
How do we ensure validity when sampling a habitat?
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