Term
| ecological specialization model |
|
Definition
| a propsed explanation for Hanski's Rule postulating that species that exploit a wide range of resources become both widespread and common; these species are generalists; also called Brown's model |
|
|
Term
|
Definition
| species that eat a variety of foods or live in a variety of habitats |
|
|
Term
|
Definition
| a proposed explanation for Hanski's Rule that assumes that species differ in their capacity to disperse, and if the environment is divided into patches, some species will occupy more local patches than others as a function of their dispersal powers |
|
|
Term
|
Definition
| the generalization that geographic range sizes decrease as one moves from polar to equatorial latitudes, such that range sizes are smaller in the tropics |
|
|
Term
|
Definition
| one propsed explantion for Hanski's Rule that the observed relationship between distribution and abundance is an artifact of the difficulty of sampling rare species and does not therefore require a biological explanation |
|
|
Term
|
Definition
| species that eat only a few foods or live in one or two habitats |
|
|
Term
| three explanations for Rapoport's Rule |
|
Definition
1.climatic variability is greater at high latitudes- only species with large home ranges can survive
2. a product of glaciation
3. arises from a lack of competition in polar communities |
|
|
Term
| three main explanations for Hanski's Rule |
|
Definition
sampling model
ecological specialization model
local population model |
|
|
Term
|
Definition
| positive relationship between distribution and abundance where more widespread species tend to be more abundant |
|
|
