Chapter 4 Flashcards
Population density
How crowded an area is
Dispersion
Pattern of spacing of a population within an area
Uniform
Same throughout an area
Uniform examples
Black bear, tiger, territorial animals
Clumped
Bunched together
Clumped examples
Herd animals, herbivore, bison
Random
No specific pattern
Random examples
White-tailed deer, squirrel
Density-independent factor
Abiotic, limiting factors that do not depend on population density
Density-independent factors examples
Weather events, fire
Density-dependent factors
Biotic, limiting factors that depend on population density
Density-dependent factor examples
Disease, competition
Population growth rate PGR
How fast a given population grows or shrinks
Natality
Birth rate
Mortality
Death rate