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Ecosystem Energy Flows
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Ecosystems
Note series for Environmental Science
“Are dynamic complexes of biotic communities and their associated abiotic environments interacting as functional units.”
-U.S. Fish and Wildlife Service
Composition of Ecosystems
• Individuals (species) live together in groups called populations
Ecosystem Energy Flows
http://www.globalchange.umich.edu
Earth as a support system
Composition of the troposphere
http://liftoff.msfc.nasa.gov/academy/space/atmosphere.html
http://otn.uoregon.edu/skmiller
marine.rutgers.edu
Biogeochemical Cycles
• Cycles on earth including gases…- Oxygen- Carbon- Nitrogen
• Cycles involving solids…- Phosphorus- Sulfur
Ecosystem Interactions
• There are many types of ecosystems in the world with many levels of interactions called “trophic interactions”
http://www.globalchange.umich.edu
Lake Trophic Interactions
Carbon Cycle
NYU Image www.cotf.edu/ete/modules/carbon/earthfire.html
Nitrogen Cycle
http://muextension.missouri.edu/xplor/waterq/wq0252.htm
Phosphorus Cycle
http://www.bsi.vt.edu/chagedor/biol_4684/Cycles/Pcycle.html
Sulfur Cycle
www.agnr.umd.edu/users/agron/nutrient/Factshee/sulfur/Sulfur.html
Taken from Garfield.com