2.5 The Function of Ecosystems – Energy Flows

Who is Howard T. Odum and what has he contributed to Energy Flows in Ecosystems? (There is no need to learn Odum’s complex diagram.)

 

 

 

 

 

Student Personal note-taking during lesson: ESS-Notes

TASK: Brainstorm the meaning of the word ‘productivity‘

• e.g. pyramids of ‘productivity’ –> the graphical, quantitative representation of the energy flow

What do you think the term ‘primary’ productivity means? [think trophic level 1…]

Check your understanding:

TASK: Brainstorm the meaning of the concept “efficiency.” What does ecological efficiency mean?

• “Is this a waste of time and energy?” What does it mean to be inefficient – perhaps this is an easier concept to grasp…
• An energy flow (i.e. transfer) is inefficient if high amounts of energy is “wasted” or “lost.”

 

TASK: List any inaccuracies in the video and suggest any improvements (content-wise).

1.1.4 Describe how the 1st and 2nd laws of thermodynamics are relevant to natural/environmental systems. 

Class presentation and notes 1.1.4 Thermodynamics

TASK: The hourglass analogy – Thermodyn Hourglass