Population Dynamics

A population is :

  1. a group of individuals,
  2. usually all of one species,
  3. living in the same place at the same time.

Population structure includes these factors :

  1. density
  2. spacing or dispersal (random, clumped, uniform)
  3. distribution over time
  4. age distribution

Organism life stages :

  1. growth period
  2. energy gathering stage
  3. dispersal
  4. resting stage
  5. reproductive stage

Tools to see patterns in populations :

  1. life tables
  2. survivorship curves
  3. age structure diagrams

Population Growth Models

  1. exponential growth - when resources are "unlimited".
  2. logistic growth - when limited by environmental constraints.
    • The population stabilizes at the carrying capacity of the system.
    • If there are time lags in the system, oscillations can develop.

Community :

All of the organisms inhabiting a common environment and interacting with one another.