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14 Cards in this Set
- Front
- Back
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What data needs to be collected to calculate Simpsons Index of Diversity? |
- Identify all species - Estimate number of individuals within each species |
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Describe how you would investigate whether leaving strips of land around fields encourages plant diversity |
- Establish study area with strips and no strips - Do random sampling - Use quadrats at regular intervals - Identify plant species - Use Simpsons Index of Diversity
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Species Richness |
Number of species in an area |
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Species Evenness |
How many individuals there are of every species in a habitat |
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Outline the implications for a habitat if the Simpsons Index of Diversity is low |
- Habitat dominated by few species - And is therefore unable to withstand change - And is more likely to lose species - Change in one species likely to affect whole habitat |
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Ensuring accuracy for Simpsons Index of Biodiversity |
- Random sampling - Sweep nets for animals - Take repeats for each habitat - Ensure standardisation of technique for each habitat |
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Explain importance of species evenness in determining biodiversity in a habitat |
- It's the number of individuals in each species - Lower species evenness = few species dominate in abundance - Higher species evenness = higher biodiversity - It is used to calculate Simpsons Index of Biodiversity - More quantitative than species richness |
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What makes communities diverse |
- Moderate abiotic environments promote diversity - High plant diversity increases consumer diversity
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Measuring Biodiversity |
- Quadrat= plants - Sweepnet= flying insects - Pitfall trap= ground insects - Net= aquatic - Transects= put tape measure across habitat and record all species touching the line at intervals
- Place randomly - Indentify species - Measure their abundance - Do repeats - Always use same sampling techniques |
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How many species on Earth? |
5 - 100 million |
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EIA |
- Estimate biodiversity on project site and evaluate how it may affect biodiversity - Identify ways to conserve biodiversity - Identify endangered species on project site - Implement measures e.g. Re-locate species |
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Rio Convention of Biodiversity |
- International strategies to conserve biodiversity - Provide guidance to governments on how to conserve biodiversity - How to use animals/plants sustainably |
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CITES Agreement |
- Illegal to kill endangered species - Limits trade through licensing - Raises awareness through education of threats to biodiversity |
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Biodiversity |
The variety of living organisms in an area |
