POPULATION GENETICS
BANDED DOTTEREL Photographer Ailsa Howard
LESSON GUIDE
Objectives
1.Understand the effect and causes of Bottle necks on New Zealand Species
2. Discuss Conservation measures, used in New Zealand, to maintain Genetic Biodiversity
STUDENT INSTRUCTIONS:
1. Read article on the Banded Dotterel - As vulnerable as the Great Spotted Kiwi.
2. Look at NCEA Population Genetic exam questions. Try some past exam questions from 'No Brain to Small'
3. Look at Founder and Bottleneck Species Cards. Use Birds online and give the Status for each species card and complete 'Status of nz bird activity.
4. From 'Birds Online' choose a species you think may come up in this years exam. I have chosen the Banded Dotterel.
5. Read about conservation of birds nesting along NZ's Braided Rivers
6. Click Kakapo picture which is linked to You Tube clip
7. Complete 4 readings with questions
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- Genetic biodiversity is an expression of the range of all the alleles present in the gene pool - the greater the number of different alleles present, the greater the genetic biodiversity.
- This is important in the survival of the species, as the greater the range of alleles, the greater the variation present, which provides more material for evolution to act on.
- When the environment changes, the chance that favourable alleles are present in the population is high and these favourable alleles to cope with the change. Therefore through their favourable alleles, some individuals will have the adaptations necessary for new environmental conditions. individuals without favourable alleles will tend to be eliminated - the frequency of their alleles in the gene pool will be reduced, maybe to zero.
- As a of the awareness of the importance of biodiversity increases, steps are being taken to preserve the genetic basis of species.
- Conservation strategies have been developed e.g captive breeding, translocation, predator management programmes.
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