Chapter 11: Intraspecific Population Regulation Flashcards
Why is the exponential curve no accurate?
b and d fluctuate based on population density
What are the assumptions associated with exponential growth?
Resources are unlimited
Environment is constant with no annual fluctuations of b and d
The maximum sustainable population size for the prevailing environment
The carrying capacity, K
Give an example of a density independent/ limiting factor.
Natural processes such as weather
Give an example of a density dependent/ regulating factor.
Decreased resources due to increased population density
Increased risk of starvation
Occurs when individuals use a common resources that is in short supply relative to the number seeking it.
Competition
Competition among individuals of the same species
Intraspecific competition
When growth and reproduction are equally depressed across individuals in a population as the intensity of population increases
Scramble competition
When some individuals claim enough resources while denying others a share
Contest competition
Individuals respond to the level of resource availability that is depressed by the presence and consumption of other I individuals in the population
Tree takes up water but leaves less for other trees
Exploitation
Progressive decline in density and increase in biomass of remaining individuals caused by the combined effects of density dependent mortality and growth within a population
Self thinning
How does self thinning affect agriculture?
High number of plants, low flowering field
Name three results of increased crowding.
Increase in hormone changes to reduce growth and delay sexual maturity
Suppress immune function
Increase young mortality from inadequate lactation
An area that an animal usually uses throughout a year
Home range
What can cause home range size to vary?
Food source availability Mode of food gathering Metabolic needs Body size Diet: carnivore herbivore Gender and age
