Chapter 12: Pop. Dynamics, Time and Space Flashcards
(16 cards)
Population Dynamics
variation in a population over space o time
Overshoot
when a population grows beyond its carrying capacity
Die-off
a substantial decline in density that typically goes well below the carrying capacity
Population Cycles
regular oscillation of population size over a long period of time
Delayed density dependence
when density dependence occurs based on a population density at some time in the past
Damped Oscillations
a pattern of population growth in which the population size initially oscillates, but the magnitude of the oscillations declines over time
Stabe limit cycle
A pattern of population growth in which the population size continues to exhibit large oscillation over time
Deterministic Model
A model that is designed to predict a result without accounting for random variation in population growth rate
Stochastic Model
a model that incorporates random variation in the population growth rate
Demographic Stochasticity
variation in birth rates and death rates due to random differences among individuals
Environmental Stochasticity
variation in birth rates and death rates due to random changes in environmental conditions
Habitat Fragmentation
the process of breaking up large habitats into a number of smaller habitats
basic metapopulation model
a model that describe a scenario in which there are patches of suitable habitat embedded within a matrix of unsuitable habitat
Source-sink Metapopulation model
a population model that builds on the basic metapopulation model and accounts for the fact that not all patches of suitable habitat are of equal quality
Source Subpopulations
in high-quality habitats, subpopulations that serve as a source of dispersers within a metapopulation
Rescue effect
the phenomenon of dispersers supplementing a declining subpopulation that is headed toward extinction
