Reading...
Play button
Play button
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;
16 Cards in this Set
- Front
- Back
|
Diversity
|
a combination of the number of species and their relative abundance defines species diversity
|
|
|
Richness
|
total number of species (variety)
|
|
|
Evenness
|
distribtuion of dominance (equality)
|
|
|
Alpha diversity
|
diversity of a particular community (local diversity)
|
|
|
Gamma diversity
|
diversity of all the communities within an area (regional diversity)
|
|
|
Beta diversity
|
species turnover between communities
|
|
|
Intermediate disturbance hypothesis
|
intermediate levels of disturbance promote higher diversity
|
|
|
Simpons's Index
|
C = 1 - sum[Pi]2
|
|
|
Inverted Simpson's Index
|
D = 1/ sum[Pi]2
|
|
|
Shannon-Wiener index
|
H = -sum[Pi ln(Pi)]
|
|
|
MacArthur-Wilson model
|
Number of species on islands balances regional process governing immigration (I) against local processes governing extinction (E).
|
|
|
Area effect
|
increased A -> increased population size -> decreased E
|
|
|
Habitat effect
|
increased A -> increased habitat diversity -> decreased E
|
|
|
Distance effect
|
increased D -> decreased I
|
|
|
Equilibrium theory of continental areas
|
equilibrium number of species in a large area in a mainland region, is determined by the balance between the speciation and extinction
|
|
|
Species-area curve
|
increased A =
increasing habitat diversity increasing probability of including rare species decreasing extinction rate |
