Dynamics of Population Growth Flashcards
define a population
a group of individuals belonging to one species and living in the same geographical area
What are the 2 types of possible growth for a population?
- unlimited environment
2. actual environment
describe an unlimited environment
one which the inherent power of increase would be realized
describe an actual environment
on which the limited resources prevent the inherent power to be realized
define models
the basic working tools for population ecologists
define population growth models
mathematical models that describe the growth of populations according to certain questions
What are the two types of population growth models?
- exponential growth model
2. logistic growth model
describe exponential growth
the population size increases by a multiplicative factor
the exponential growth model consists of what 2 phases?
lag and acceleration phase
lag phase occurs during
early growth
lag phase results from
the fact that organisms need to adjust to their new environment
What is unlimited and limited in the acceleration phase?
unlimited: environmental resources
limited: organisms physiological capacity to survive and reproduce
the logistic growth model is a modification of
the exponential growth model
K is the
carrying capacity
What are the 4 phases to the logistic growth curve?
- lag phase
- acceleration phase
- deceleration phase
- equilibrium phase
