AP Bio Chapter 52 Part 2 Flashcards
Logistic growth
Much more common. Typically populations oscillate around the carrying capacity
Where does exponential growth occur
Occurs typically in small populations, well beyond the carrying capacity of the environment
Life history traits
Any trait that effects an organism’s life table
costs and benefits of all adaptations
What are the 2 reproductive strategies
Semelparity and iteroparity
Semelparity
Produce a lot of offspring once. Less parenting
Iteroparity
Reproduce few offspring repeatedly, more parenting
Parental care
The number of babies varies inversely with amount of parental care
R-selected
Selection for traits that maximize reproductive success at low population densities
K selective
Selection for traits that maximize reproductive success at high population densities
Examples of density dependent population regulation
Competition, predation, waste accumulation, territoriality, intrinsic factors, disease
What would cause these density dependent regulators to be at a higher percentage
Bigger population
Density independent
Takes same percentage if populations are large OR small
Natural disaster
What’s an example of an intrinsic factor and what does it do
Stress hormones, they cause animals to become more aggressive because of the competition
Disease spreads more easily in ________ populations
Large
Human population growth is the underlying root of what
All anthropogenic ecological problems
Historical human growth rate
The human population has been in a period of accelerated exponential growth since the Industrial revolution…that growth rate is slowing down
Various changes in demographics occur when what happens, and what this called
As countries industrialize
The demographic transition
What do age structure pyramids show
Population growth
The higher the percentage of population in the younger ages, the more it will grow
