biodiversity Flashcards
1
Q
biodiversiy
A
variety and complexity of life, measure of species richness, evenness, genes and their ecosystem
2
Q
ecosystem/habitat biodiversity
A
number and range of different ecosystems and habitats
3
Q
species biodiversity
A
number of species and their relative abundance
4
Q
genetic biodiversity
A
genetic variation within each species
5
Q
ecosystem
A
relatively self-contained unit of living organisms interacting with each other and their abiotic environment
6
Q
niche
A
role of an organism within an ecosystem
7
Q
spearman’s rank correlation
A
- data + null hypothesis
- scatter graph
- rank
- difference in rank (D)
- compare to critical value
- determines whether there is correlation between variables that don’t show a normal distribution
8
Q
pearson’s correlation coefficient
A
- data + null hypothesis
- sum of x, sum of y, sum of x2, sum of y2, sum of xy
- r
- compare to critical value
- statistical test that determines whether there is linear correlation between two variables
- The data must: Be quantitative and Show normal distribution
9
Q
sampling methods
A
- samples ca be used to estimate number of organisms in a habitat or measure their characteristics, abundance and distribution
10
Q
random sampling
A
- to avoid bias
- frame quadrats: % cover/ACFOR
11
Q
systematic sampling
A
- distribution of organisms in relation to an abiotic factor
- line transects: stretch a string or tape across a habitat and record the plants touching it at regular intervals
- belt transects: two parallel lines are marked and samples are taken of the area between or a quadrat can be placed at intervals
12
Q
sampling animals
A
- sweep netting, pooter, longworth trap, pitfall, tullgren funnel, tree beating, kick sampling, light trap
13
Q
Lincoln index
A
- mark, release, recapture
14
Q
Simpson’s index (D)
A
- 0-1 (1 being high biodiversity)
- low: stressful, few species dominate
- high: complex interactions, many niches
