23.5 Flashcards
1
Q
Why should the measurement of distribution be systematic?
A
- different areas within an ecosystem are identified
- these areas vary in their abiotic conditions
- random sampling might miss some areas
2
Q
How is distribution measured?
A
- using a transect
3
Q
How is abundance measured?
A
- using quadrats
4
Q
When should a one or belt transect be used?
A
- line: involves taking samples at regular intervals along a linear tape. Gives distribution but not abundance
- belt: involved recording species within two parallel lines. Gives distribution and abundance
5
Q
What is the equation for population size?
A
Number of individuals in sample/area of sample
6
Q
What is the equation for population size? (Capture-recapture) (Lincoln’s index)
A
(First sampled x second sample) / recaptured individuals
