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Biogeochemical Cycles How do nutrients cycle through the environment?

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Presentation on theme: "Biogeochemical Cycles How do nutrients cycle through the environment?"— Presentation transcript:

1 Biogeochemical Cycles How do nutrients cycle through the environment?

2 MATTER

3 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.

4 NUTRIENT CYCLING Nutrients cycle through the environment endlessly

5 Nutrient Cycling Question: What do you know about nutrition and nutrients?

6 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.

7 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.

8 NITROGEN CYCLE The nitrogen cycle relies on bacteria that make nitrogen useful to organisms and bacteria that can return it to the atmosphere.

9 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.

10 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.

11 Nitrogen Cycle Nitrogen fixation converts nitrogen gas into ammonia – 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 (NO 3 - ) that plants can use.

12 Nitrogen Cycle Denitrification bacteria complete the nitrogen cycle by converting nitrates in soil or water back to nitrogen gas.


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