Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
What data needs to be collected to calculate Simpsons Index of Diversity? |
- Identify all species - Estimate number of individuals within each species |
|
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
|
|
Species Richness |
Number of species in an area |
|
Species Evenness |
How many individuals there are of every species in a habitat |
|
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 |
|
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 |
|
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 |
|
What makes communities diverse |
- Moderate abiotic environments promote diversity - High plant diversity increases consumer diversity
|
|
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 |
|
How many species on Earth? |
5 - 100 million |
|
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 |
|
Rio Convention of Biodiversity |
- International strategies to conserve biodiversity - Provide guidance to governments on how to conserve biodiversity - How to use animals/plants sustainably |
|
CITES Agreement |
- Illegal to kill endangered species - Limits trade through licensing - Raises awareness through education of threats to biodiversity |
|
Biodiversity |
The variety of living organisms in an area |