12 terms

Chapter 4 Population Ecology

r-strategist - small, short life-span, many offspring
k-strategist - large, long life span, few offspring
What are the characteristics of r- and k-strategists?
population density, spatial distribution, and growth rate
What are three characteristics that all populations have?
bacteria, animals, and plants
What are these three characteristics used to classify?
What is one of the primary factors in the pattern of dispersion?
abiotic factors such as weather (drought, flooding, tornadoes, hurricanes, or extreme heat/cold)
Density-independent factors usually include...
predation, disease, parasites, and competition.
Density-dependent factors usually include...
logistic: S shaped; exponential: J shaped
What shape is a logistic or an exponential population growth?
carrying capacity
Populations tend to stabilize near the _____ ____ of their environment.
limiting factors
density-independent and -dependent are _______.
randomly, uniformly, or in clumps
Populations tend to be distributed _______, _______, or in ______.
spatial distribution- the way organisms are dispersed in their environment.
population density- the number of organisms per unit area
population growth rate- explains how fast a given population grows
Compare and contrast spatial distribution, population density, and population growth rate.
carrying capacity- the maximum number of individuals in a species that an environment can support
limiting factors- keep a population from being able to increase indefinitely
Summarize the concepts of carrying capacity and limiting factors and their effects on reproductive patterns.