biogeochemical cycles how do nutrients cycle through the environment?
TRANSCRIPT
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Biogeochemical CyclesHow do nutrients cycle through the environment?
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MATTER
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Matter
• Is any material that has mass and occupies space.
• Is never used up and never goes away.– It cycles round and round.
• The Law of Conservation of Matter is a principle that states that matter may be transformed from one type of matter to another, but it can’t be created or destroyed.
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NUTRIENT CYCLING Nutrients cycle through the environment endlessly
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Nutrient Cycling
• Question: What do you know about nutrition and nutrients?
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Nutrient Cycling
• Nutrients are matter that organisms require for their life processes.
• Two types– Macronutrients which are
required in large amounts and include nitrogen, carbon, and phosphorus.
– Micronutrients which are required in small amounts.
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Nutrient Cycling
• Endlessly circulate through the environment in biogeochemical cycles.
• Carbon, oxygen, phosphorus, nitrogen are nutrients that cycle through all of Earth’s spheres and organisms.
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NITROGEN CYCLE
The nitrogen cycle relies on bacteria that make nitrogen useful to organisms and bacteria that can return it to the atmosphere.
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Nitrogen Cycle• Nitrogen– Makes up 78% of the
atmosphere and is the sixth most abundant element.
– Is an essential • Ingredient of DNA & RNA
(proteins) that build organisms.
• Nutrient for plant growth– This means that the
nitrogen cycle is vital to all organisms.
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Nitrogen Cycle
• Nitrogen gas cannot cycle out of the atmosphere and into organisms.– The nitrogen cycle
chemically changes nitrogen gas to make nitrogen available to organisms that need it.
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Nitrogen Cycle
• Nitrogen fixation converts nitrogen gas intoammonia– This accomplished by
• Intense energy of lightning.• Nitrogen-fixing bacteria
– Live in soil or associated with soybean, clover, and legumes.
– Use the process of nitrification to produce nitrate ions (NO3
-) that plants can use.
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Nitrogen Cycle
• Denitrification bacteria complete the nitrogen cycle by converting nitrates in soil or water back to nitrogen gas.