008 – Energy Flow in Ecosystems
In this video Paul Andersen explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An explanation of gross primary productivity and net primary productivity are included. Energy and biomass in ecological pyramids show energy efficiency.
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Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/
Creative Commons Atribution License
Title: String Theory
Artist: Herman Jolly
All of the images are licensed under creative commons and public domain licensing:
“Atomic Bond – Free Education Icons.” Flaticon. Accessed September 8, 2015. www.flaticon.com/free-icon/atomic-bond_65469.
“Chemosynthesis.” Wikipedia, the Free Encyclopedia, August 22, 2015. https://en.wikipedia.org/w/index.php?title=Chemosynthesis&oldid=677338446.
Ebyabe. Silver Springs, Florida: Silver River, July 26, 2009. Own work. https://commons.wikimedia.org/wiki/File:Ocala_Silver_River01.jpg.
“Hydrothermal Vent.” Wikipedia, the Free Encyclopedia, September 1, 2015. https://en.wikipedia.org/w/index.php?title=Hydrothermal_vent&oldid=678920124.
Lab”, This image has been created during “DensityDesign Integrated Course Final Synthesis Studio” at Polytechnic University of Milan, organized by DensityDesign Research Lab Image is released under CC-BY-SA licence Attribution goes to “Roberta Rosina, DensityDesign Research. English: “A Food Web Consists of All the Food Chains in a Single Ecosystem” [Cit. National Geographic Education], December 1, 2014. Own work. https://commons.wikimedia.org/wiki/File:Food_Web.svg.
NASA. English: The Maps above Show One Way to Monitor the Carbon “metabolism” of Earth’s Vegetation., January 28, 2014. Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. https://commons.wikimedia.org/wiki/File:MOD17A2_M_PSN.ogv.
Thompsma. English: Three Different Kinds of Trophic Pyramids Are Illustrated, Including a Pyramid of Numbers (top), Pyramid of Biomass (middle), and Pyramid of Energy)., July 5, 2011. Own work. https://commons.wikimedia.org/wiki/File:EcologicalPyramids.jpg.