2. Human Activities can Alter Ecosystems Aaron Gaecke Cory Hahlbeck

3. How human activities can impact chemical cycles Chemical cycles keep the amount of chemicals on Earth perfectly in balance. o There are several major cycles, including the:  Oxygen Cycle  Nitrogen Cycle  Carbon Cycle

4. Examples of Human Activities that impact Chemical Cycles Human activities that cause Greenhouse-Gases can disturb the cycle by increasing the amount of CO2 in the atmosphere Oil spills o Large oil spills can impact o the environment on a large scale

5. How human activities and pollution can affect food chains Every living being depends on one another for survival whether it be for food, or protection, or something else. o Humans have upset this balance by:  Polluting, taking large amounts of food from the oceans, and many other reasons.

6. Examples of Human Activities that affect Food Chains Breaking one link on the chain means all of the organaisms above that link are in threat of extinction (like the domino effect) Human involvement in the form of habitat destruction, pollution, and overfishing can affect food webs and food chains.

7. Ecosystem. (2010). [Web]. Retrieved from http://www.ace.mmu.ac.uk/esd/Images/ecosystem.gif Utah Education Network, Initials. (1999). Chemical cycles. Retrieved from http://www.uen.org/themepark/cycles/chemical.shtml Impact of man's activities. (2010). Retrieved from http://www.tutorvista.com/content/science/science- ii/environment/activities-environment.php Eco-green. (2010). [Web]. Retrieved from http://dryicons.com/files/graphics_previews/eco_green.jpg Lime-green. (2010). [Web]. Retrieved from http://backgrounds.mysitemyway.com/wp- content/Userfiles/Galleries/foliage-swirls/foliage-swirls-000121-lime-green.jpg Recycle. (2010). [Web]. Retrieved from http://thefreemarketeers.files.wordpress.com/2009/05/recycle.jpg Stream pollution. (2010). [Web]. Retrieved from http://clipart.coolclips.com/150/wjm/tf05152/CoolClips_vc006278.jpg Fish chain. (2010). [Web]. Retrieved from http://www.cotf.edu/ete/images/modules/k4/biomes/Bhandson3P1 Wetland food map. (2010). [Web]. Retrieved from http://waterwatchadelaide.net.au/uploads/images/wetlands/food_web_arrow.gif United Nations Environment Programme, Initials. (1997). What Human activities contribute to climate change?. Retrieved from http://www.gcrio.org/ipcc/qa/04.html Sources ~ APA