Exam 6 Intraspecific Interactions Flashcards
The study of geographic ranges
Areography
Geographic range size increases with increasing latitude.
Rapaport’s Rule
Marine invertebrates have more direct development with increasing latitude.
Thorson’s Rule
Marine fish have more vertebrate at higher latitudes. Explanation = bigger fish
Jordan’s Rule
Endotherms tend to be more darkly colored in more humid environments.
Gloger’s Rule
Limbs and extremities tend to decrease in size in higher latitude endothermic vertebrates.
Allen’s Rule
Average body size tends to increase in higher latitudes populations of endothermic vertebrates. Ex. Moose
Bergmann’s Rule
Species diversity is usually highest at intermediate levels.
Elevational Gradient
Species diversity increases at mid latitudes and decrease into higher or lower latitudes.
Latitudinal Patterns
The dissimilarity in species composition between large geographic areas.
Delta Diversity
Gamma ➗ alpha diversity
Beta diversity
Species richness in a very large geographic area.
Gamma Diversity
Species composition changes along an environmental gradient.
Beta Diversity
Number of species in a single community.
Alpha Diversity
No place to emigrate to. Thus, usual emigrants must stay.
Fence Effect