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Nutrient Cycles

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by

Kimberlie Cassady

on 28 September 2012

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Transcript of Nutrient Cycles

Recycling in the Biosphere Water, Carbon, & Nitrogen Cycles Unlike the one-way flow of energy, nutrients are cycled between the living and nonliving things through biogeochemical cycles. Water Cycle Water moves between the ocean, atmosphere, and land. Precipition - Water returns from the atmosphere in the form of precipitation
EX - Rain, snow, sleet, hail. Evaportion - water changes from a liquid form to an atmospheric gas Transpiration - evaporation from the leaves of plants Carbon is the key ingredient in all living organisms and is also found in the oceans, in the air, and in certain types of rocks. Carbon Cycle Biological - Photosynthesis, respiration, decompostion Geochemical - Volcanic eruptions Biogeochemical - buriel of organisms and their conversion into fossil fuels Human Activities - mining, burning of fossil fuels, cutting and burning forests All organisms require nitrogen to make amino acids, which in turn are used to build proteins. Nitrogen Cycle Interesting facts about the nitrogen cycle
Nitrogen makes up 78% of the Earth's atmosphere
Nitrogen is found in waste from organisms and dead and decaying matter
Nitrogen is also in oceans and other large bodies of water. Bacteria play a big role in the nitrogen cycle
Nitrogen Fixation - bacteria on the roots of plants convert nitrogen gas into ammonia
Dentrification - Bacteria in the soil convert nitrates into nitrogen gas that goes back into the atmosphere
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