carbon cycle. nutrient cycles in ecosystems— biogeochemical cycles organisms are composed of...

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Carbon Cycle

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Page 1: Carbon Cycle. Nutrient Cycles in Ecosystems— Biogeochemical Cycles Organisms are composed of molecules and atoms that are cycled between living and non-

Carbon Cycle

Page 2: Carbon Cycle. Nutrient Cycles in Ecosystems— Biogeochemical Cycles Organisms are composed of molecules and atoms that are cycled between living and non-

Nutrient Cycles in Ecosystems—Biogeochemical Cycles

Organisms are composed of molecules and atoms that are cycled between living and non-living portions of an ecosystem.

These nutrient cycles are called biogeochemical cycles.

Page 3: Carbon Cycle. Nutrient Cycles in Ecosystems— Biogeochemical Cycles Organisms are composed of molecules and atoms that are cycled between living and non-

Carbon Cycle

1. Carbon and oxygen combine to form carbon dioxide.2. Plants use carbon dioxide during photosynthesis to produce

sugars.3. Plants use sugars for plant growth.4. Herbivores eat plants, break down the complex organic

molecules into simpler molecular building blocks, and incorporate those molecules into their structure.

5. Respiration breaks down organic molecules into CO2 and water and releases those compounds back into the atmosphere.

Page 4: Carbon Cycle. Nutrient Cycles in Ecosystems— Biogeochemical Cycles Organisms are composed of molecules and atoms that are cycled between living and non-

Carbon Cycle

6. The decay process of decomposers involves respiration and therefore recycles naturally occurring organic molecules.

7. Burning fossil fuels takes carbon atoms that were removed temporarily from the active, short-term carbon cycle and reintroduces them into the active cycle.

Page 5: Carbon Cycle. Nutrient Cycles in Ecosystems— Biogeochemical Cycles Organisms are composed of molecules and atoms that are cycled between living and non-

Carbon Cycle

Carbon cycle