2.3 Biochemical cycles

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Characteristics of biochemical cycles

• Closed systems

• Nutrients are recycled

  • Environment > organisms > environment

  • Flows via transfers or transformations

• To ensure that the chemical elements are available to living organisms

What is carbon store? List examples

• Where elements are held or stored for varying lengths of time in biochemical cycles

• Example of stores:

  • Ocean

  • Soil

  • Atmosphere

What is carbon sequestration

• Carbon store or storage is an area where carbon accumulates over time through carbon sequestration

• It is the process of capturing gaseous and atmospheric co2 and storing it in a solid or liquid form.

  • Reducing the amount of co2 in the atmosphere

True or false does carbon in atmosphere stays shorter than in fossil fuels, where it takes over millions of years

true

What is carbon flow

Transfer, transformation between stores in ecosystems by photosynthesis, cellular respiration, death, decomposition Transfer

However, not all consumed carbon is assimilated some is just waste

This returns carbon to the soil where it can be used by decomposers or contribute to soil organic matter

When animals eat other shit the carbon gets transferred into their own bodies.

Also when organisms die and their dead body gets broken down by decomposers such as fungi, the process converts carbon back to inorganic form so it releases co2 back to the soil and atmosphere