Chapter 5 Biology
What are density dependent factors?
competition, predation, parasitism, disease
what is the difference between population density and distribution?
density is how many in a given space, distribution is how they are spaced out
what is a limiting factor?
factor that controls that growth of a population
what are the four characteristics that define a population?
geographic range, density and distribution, growth rate, and age structure
what is carrying capacity?
the maximum number of individuals of a particular species that a particular environment can support
what is the relationship between competition and population size?
the more competition the greater the population size
what is density and distribution?
-population density is the number of individuals per unit area -distribution is how individuals in a population are spaced out
When do populations grow exponentially?
Under ideal conditions with unlimited resources
what is growth rate?
a populations growth rate determines whether the size of the population increase, decreases, or stays the same
what's he difference between immigration and emigration?
immigration is coming in to population, emigration is exiting
what is an example of uniform distribution?
king penguin, dots represent individual members in a population
what are density independent factors?
natural disasters (wildfires) and unusual weather (hurricanes, droughts, floods)
what is age structure?
number of males and females of each age in the population
More dandelion seedlings develop in a lawn than dandelion plants are removed. What is likely to happen to the lawn's dandelion population?
population will go up
what is an example of clumped distribution?
striped catfish, these fish organize in tight groups
what is geographic range?
the area inhabited by a population
When does logistic growth occur?
when a population's growth slows or stops following a period of exponential growth
what is an example of random distribution?
wild flowers that grow randomly in a field (dandelion)
