6.3B Specific Exam Focus
- Created by: MaggieNaylor
- Created on: 28-02-22 14:22
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- Specific Exam Focus: 6.3B: Balanced Carbon Cycle
- Photosynthesis regulating the atmosphere
- Phytoplankton
- Sequests CO2 in ocean through photoynthesis
- This puts it out of the atmosphere and into ocean store
- This transfers 5-15 Gt of carbon from atmosphere to ocean each year
- This puts it out of the atmosphere and into ocean store
- Sequests CO2 in ocean through photoynthesis
- Terrestrial photosynthesis
- Plants sequester 100-120Gt of CO2 a year
- It is returned to the atmosphere via respiration/decomposition
- Different ecosystems absorbing CO2 from photosynthesis
- Tropical rainforests and coral reefs absorb the most from photosynthesis.
- Any impact on amount of phytoplankton, or land covered by forest will impact level of carbon sequestration
- This will impact composition of the atmosphere
- Phytoplankton
- Soil and carbon
- Carbon is vital in soils
- 1. Gives it its water retention capacity, structure, and fertility 2. Supports micro-organisms which maintain nutrient cycle, breakdown of organic matter 3. Provides pore spaces for infiltration/water storage
- W/O carbon in soil, the nutrient and water cycle cannot function
- 1. Gives it its water retention capacity, structure, and fertility 2. Supports micro-organisms which maintain nutrient cycle, breakdown of organic matter 3. Provides pore spaces for infiltration/water storage
- What does healthy soil look like?
- Dark, crumbly, porous
- Contains worms and other organisms
- Provides air, water, and nutrients for micro-organisms + plants to thrive
- Contain more carbon + organic matter. They also sequester carbon
- Ecosystem productivity
- Definition: the rate of generation of biomass in an ecosystem
- More carbon in soils=healthier soils=more biomass (plants) produced
- Carbon is vital in soils
- Photosynthesis regulating the atmosphere
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