A09_207_5A_BiogeochemicalCycles

A09_207_5A_BiogeochemicalCycles - Biogeochemical Cycles...

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Unformatted text preview: Biogeochemical Cycles what does the name suggest ? 3 Fundamental Laws of Nature Conservation of Matter Matter is converted from one form to another 1st Law of Thermodynamics (Conservation of Energy) 2nd Law of Thermodynamics (Entropy) Energy Pyramid 3 Most energy in most ecosystems is stored in the bodies of primary producers . Only about 10 percent of the energy at one energy level passes to the next highest trophic level. Earth: Matter does not come and go Earth is a closed System to Matter but open to energy Biogeochemical cycles Matter moves from one form to the next via several processes nonbiological geologic, chemical and physical Biological Matter can be in the form of a gas, liquid or solid They can change from a biotic to a abiotic form and back to biotic Biogeochemical Cycles: Reservoirs & Pathways Atmosphere Hydrosphere Lithosphere Biosphere Nutrients Cycle in the Biosphere Biogeochemical cycles, nutrient cycles Hydrologic Carbon Nitrogen Phosphorus Sulfur Connect past, present , and future forms of life N availability Immobilization is when plants or other organisms take up N form the soil Mineralization is the process by which N is released back into the soil after an organism dies Nitrifying bacteria help to transform N Nitrification NH 3 NO 3- used by plants Denitrification NO 3- - NH 3 N fixation Nitrogen Cycles through the...
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A09_207_5A_BiogeochemicalCycles - Biogeochemical Cycles...

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