Lab 13: Demography Flashcards
A population grows when birth rate __________ death rate.
Exceeds
A population grows when __________ rate exceeds __________ rate.
Birth, death
__________ __________ study the factors that determine demography, including resources, predators, diseases, and competitors.
Population biologists
__________ __________ are equations designed to represent real-world processes in simple ways, so that we can better understand the forces that affect real populations.
Population models
In this lab, you will use the program __________, which is free software for understanding population models.
Populus
“__________-__________” means that a population grows without regards to its density.
“Density-independent”
Two model types exist:
Continuous and Discrete
The __________ model uses calculus to figure population size at instantaneously small time steps.
Continuous
The __________ model uses simple algebra and waits one time step to figure population size.
Discrete
What symbol represents discrete models?
Lambda
What symbol represents continuous models?
R
Lambda and r both represent:
Growth rate
Difference between birth rate and death rate.
Intrinsic rate of increase (r)
The ratio of population size at the end of one time interval to the population size at the end of the previous time interval.
The rate of growth (lambda)
The population size that can be maintained by given resources.
Carrying capacity
