http://web.pdx.edu/~rueterj/courses/esr101-200904/lecture5.html

Lecture 5

October 13, 2009

Brief outline of the day:

  • Introduction to "systems" viewer
  • principles of systems
  • flow of energy and material through organisms, communities, ecosystems
  • Announcments: mini-quiz #1 due Friday at mid-night

 

 

Lecture Notes:

 

Introduction to systems viewer

  • viewers
  • purpose of their use
  • patterns-likelihood
  • systems - salient features
    • measurable quantities flowing between different compartments

 

 

Study of ecological material and energy flow

  • metabolism of an individual organism
  • population - group of same species
  • community - flow of energy and material through multiple different types of organisms working together
  • ecosystem - biological and physical environment

 

metabolism

ecological hierarchy and trophic diagram

Principles of the systems view

  • principles with examples
  • key relationships
    • open or closed system
    • mass and energy balance
    • flow limitation and control
    • steady state
    • positive or negative feedback

 

systems - principles

chapter 5

systems - feedback