12/10/09 Lecture 9: THE ECOSYSTEM 1

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Online bioscience course for grades 6-12

Fall 2009

12/10/09 Lecture 9: THE ECOSYSTEM 2

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Class mechanics…

• Attend the online Office Hour on Tuesdays at 3 PM via tokbox-Discuss previous week’s video lecture• Online video lecture e-mailed every Wednesday-view lecture and prepare to discuss the following Tuesday• Comment on video lecture using website discussion board• Online Final Exam given 12/16/2009

12/10/09 Lecture 9: THE ECOSYSTEM 3

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Lecture 9: The ecosystem

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Communities and Ecosystems:

http://www.youtube.com/watch?v=GYrZEid_BeM

12/10/09 Lecture 9: THE ECOSYSTEM 5

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Take Homes:

I. EcosystemsII. Food websIII. BiomesIV. NichesV. The biosphere

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Ecosystems :

http://en.wikipedia.org/wiki/Ecosystem

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Central concept of ecosystems:

Central to the ecosystem concept is the idea that living organisms interact with every other element in their local environment.

http://en.wikipedia.org/wiki/Ecosystem

12/10/09 Lecture 9: THE ECOSYSTEM 8

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Take Home IEcosystems

Ecosystems describe the networks of interactions between all organisms and their environments…

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Food webs:

http://en.wikipedia.org/wiki/Food_web

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Bill Nye the Science Guy-Food Web:

http://www.youtube.com/watch?v=7lmvBWEqusk

http://www.youtube.com/watch?v=rnIOTMpydpg

http://www.youtube.com/watch?v=T_vyDFW0TVU

12/10/09 Lecture 9: THE ECOSYSTEM 11

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Photosynthesis:

http://www.youtube.com/watch?v=03TM6vp9HPk

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Take Home II

Starting with energy from the Sun being converted to sugar viaphotosynthesis food webs describe the energy flow from microbes to humans in the planetary ecosystem…

Food webs

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Biomes:

http://en.wikipedia.org/wiki/Biome

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Biomes video:

http://www.youtube.com/watch?v=ag5ATGEplbU

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Take Home III

Biomes are climatically and geographically defined areas of ecologically similar climatic conditions such as communities of plants, animals, and soil organisms, and are often referred to as ecosystems. Biomes are defined by factors such as plant structures (such as trees, shrubs, and grasses), leaf types (such as broadleaf and needleleaf), plant spacing (forest, woodland, savanna), and climate.

Biomes

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Niche:

http://en.wikipedia.org/wiki/Ecological_niche

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Ecological Niche of Brine Shrimp:

http://www.youtube.com/watch?v=cjylhrA6AmA

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Take Home IV

A niche is how an organism makes a living.

Niches

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Biosphere:

http://en.wikipedia.org/wiki/Biosphere

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DISH TV channel 212:

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Biosphere video:

http://www.youtube.com/watch?v=_iRhSrwWcKQ

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Chlorophyll monitoring from space:

http://earthobservatory.nasa.gov/GlobalMaps/view.php?d1=MY1DMM_CHLORA

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Take Home V

The biosphere is the global sum of all ecosystems on Earth.

The biosphere

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Next Week:

Computers in biology

An overview of the use of computers in biology and the revolution they have caused…

12/10/09 Lecture 9: THE ECOSYSTEM 25

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instructorMark E Minie PhD

mark@meminie.com