lecture 9 the ecosystem
TRANSCRIPT
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
12/10/09 Lecture 9: THE ECOSYSTEM 4
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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
12/10/09 Lecture 9: THE ECOSYSTEM 6
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Ecosystems :
http://en.wikipedia.org/wiki/Ecosystem
12/10/09 Lecture 9: THE ECOSYSTEM 7
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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…
12/10/09 Lecture 9: THE ECOSYSTEM 9
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Food webs:
http://en.wikipedia.org/wiki/Food_web
12/10/09 Lecture 9: THE ECOSYSTEM 10
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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
12/10/09 Lecture 9: THE ECOSYSTEM 12
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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
12/10/09 Lecture 9: THE ECOSYSTEM 13
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Biomes:
http://en.wikipedia.org/wiki/Biome
12/10/09 Lecture 9: THE ECOSYSTEM 14
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Biomes video:
http://www.youtube.com/watch?v=ag5ATGEplbU
12/10/09 Lecture 9: THE ECOSYSTEM 15
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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
12/10/09 Lecture 9: THE ECOSYSTEM 16
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Niche:
http://en.wikipedia.org/wiki/Ecological_niche
12/10/09 Lecture 9: THE ECOSYSTEM 17
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Ecological Niche of Brine Shrimp:
http://www.youtube.com/watch?v=cjylhrA6AmA
12/10/09 Lecture 9: THE ECOSYSTEM 18
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Take Home IV
A niche is how an organism makes a living.
Niches
12/10/09 Lecture 9: THE ECOSYSTEM 19
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Biosphere:
http://en.wikipedia.org/wiki/Biosphere
12/10/09 Lecture 9: THE ECOSYSTEM 20
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DISH TV channel 212:
12/10/09 Lecture 9: THE ECOSYSTEM 21
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Biosphere video:
http://www.youtube.com/watch?v=_iRhSrwWcKQ
12/10/09 Lecture 9: THE ECOSYSTEM 22
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Chlorophyll monitoring from space:
http://earthobservatory.nasa.gov/GlobalMaps/view.php?d1=MY1DMM_CHLORA
12/10/09 Lecture 9: THE ECOSYSTEM 23
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Take Home V
The biosphere is the global sum of all ecosystems on Earth.
The biosphere
12/10/09 Lecture 9: THE ECOSYSTEM 24
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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