Paper 1 Flashcards
Explain the importance of sampling in measuring the biodiversity of a habitat
Sample provides and estimate as it is impossible to count every individual.
Outline the significance of a low value of Simpson’s index of diversity
The habitat is dominated by few species, as such the ecosystem is less able to cope with change
Describe the term phylogeny
The evolutionary relationship between organisms and species
Explain how phylogeny is related to classification. Use the two lynx examples.
Common ancesto, phylogeny is the basis of classification, l.lynx and l.pardinus are similar enough for same genus but not same species.
Suggest why it is only in the last 10 years that the Iberian lynx has been classified as a separate species.
New technology allows the analysis of DNA, showing their differences.
Outline 3 reasons why it is important to conserve the Iberian lynx
They are part of the food chain as top predator, all organisms have a right to exist and as humans we should persevere other organisms as a duty, the tourism generated supports the local community.
Why is in sometimes necessary to conserve a plant species outside its natural habitat?
Protects from possible predation, preserves biodiversity, death of the plant may be the result of human activity.
Give one advantage of conserving a plant species as seeds and not an adult plant
Lower maintanence costs.
Suggest 3 reasons why estimates of the number of species on earth is not likely to be accurate
- Species may have become extinct since recording
- Evolution is ongoing, new species being formed.
- Human error would make it inaccurate
Outline the implications for a habitat if the simpsons index of diversity is low.
- One major species of organism dominating the ecosystem
2. Ecosystem susceptible to damage and change
Define the term biodiversity
The variety of species in one area, the variety of habitats and ecosystems.
