Biochemical Cycles

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  • Topic: Water, Oxygen, Water cycle
  • Pages : 2 (496 words )
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  • Published : April 22, 2013
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INTRODUCING WITH BIOCHEMICAL CYCLES

Biochemical cycles
Nutrients are important for organisms to function. Each nutrient has a role in global biogeochemical cycles. A nutrient is a chemical that organisms need to live and grow and are substances an organism's uses for metabolism which must be taken in from its environment that enrich the organism. Two types of nutrients are macronutrients and micronutrients. Macronutrients are needed in large quantities while micronutrients are needed in smaller quantities. A biogeochemical cycle moves chemical element between living, and nonliving parts in the environment. I will describe the water cycle, explaining the major processed involved and the relationship of micronutrients. There are five major global biogeochemical cycles, each with a different function and relationship to micronutrients. They can be classified as either gaseous, sedimentary, or hydrololic. The water cycle is a hydrologic cycle that moves water in the biosphere through evaporation, condensation and precipitation. Two sedimentary cycles are the sulfur and phosphorous cycle. Their main reservoirs are in soil and rock sediments. Sulfur enters the cycle as hydrogen sulfide and is oxidized to sulfur dioxide. Sulfur dioxide and water vapor makes sulfuic acid in the rainfall. It is then absorbed by plant roots and turned into amino acids traveling through the food chain and released by decomposition. In the phosporous cycle, phosporours is released through erosion or mining. It is then absorbed by roots and then travels through the food chains and returned to sediment. When the main reservoir of the nutrient is the atmosphere it is considered a gaseous cycle. The carbon and nitrogen cycles are gaseous cycles. Carbon enters the environment during photosynthesis and is returned through cellular respiration. Nitrogen enters the cycle by nitrogen fixation and results in ammonia and nitrates that are carried to the Earth by precipitation. Once they entered...
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