Chapter 44 Population Ecology Flashcards
What kind of experiments don’t require the manipulation of variables?
Natural Experiments.
What is a geographic range?
Overall spatial boundaries within which a population lives.
What is a habitat?
Specific region in a geographic range within which a population lives.
What information can be inferred from knowing the population size and density?
Resources.
What is 1 way to estimate a population size?
Capture-Recapture.
How is density related to body mass?
Inversely.
What is population dispersion?
Dispersion of population within a geographic range.
What is the most common pattern of dispersion?
Clumped
What is the most uncommon pattern of distribution?
Uniform.
What are the 3 categories in age structure?
Prereproductive, reproductive, and postreproductive.
What is generation time?
Avg time between individual born and its’ offspring.
How is body size related to generation time?
Positively.
What is demography?
Study of the factors that change population size and density.
What are population growth factors?
Immigration and birth.
What are population decline factors?
Emigration and death.
What is the purpose of demography?
Predicts populations future growth.
What is used to summarize information about demographics of a population?
Life tables.
What is the term that referes to life time patterns of growth, maturation, and reproduction (Basic life)?
Life History.
What kind of models are logistic and exponential?
Mathmatical.
What is the per-capita exponential growth model equation?
dN/dt= rN
What is the logistic growth equation?
dN/dt = rN(K-N)/K
What happens to r when NK, and N=K?
r>0, r
How can some populations exceed K?
Use stored energy.
How does crowding affect a population?
Decreases adult size, survivorship, fecundity, and individual growth rates.
