The Soils of the Tropical Equatorial Rainforest
Refers to AQA A2 Geography
Ecosystems: Change and Challenge Option
- Created by: Bethany
- Created on: 19-04-14 13:27
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- Tropical Equatorial Rainforests - Soils
- ZONAL SOIL
- In an undisturbed biome soil develops naturally over time, in balance with its environment.
- The soil is mature and strongly reflects the climate and vegetation.
- In a tropical rainforest, the soil is known as LATOSOL
- Can be more than 40m deep
- The hot-wet climate provides perfect conditions for the chemical weathering of bedrock so there is a constant supply of minerals from the parent rock to the soil.
- FERRAL - LISATION is the process by which the bedrock is broken down by chemical weathering into clay minerals and sesquiosides.
- In a tropical rainforest, the soil is known as LATOSOL
- Can be more than 40m deep
- The hot-wet climate provides perfect conditions for the chemical weathering of bedrock so there is a constant supply of minerals from the parent rock to the soil.
- FERRAL - LISATION is the process by which the bedrock is broken down by chemical weathering into clay minerals and sesquiosides.
- WEATHERING OF BEDROCK
- COLOUR
- Red in colour, partly due to the presence of iron and aluminium minerals
- NUTRIENTS
- As rainfall exceeds evapo - transpiration, there is a downward motion of water through the soil.
- Silica minerals are washed out by a process known as LEACHING
- The less soluble iron and aluminium compounds are left behind in the leaching process, hence why the red colour is so dominent.
- Red in colour, partly due to the presence of iron and aluminium minerals
- The latosoil is NUTRIENT POOR.
- Uptake of nutrients is roughly equal to the input from decomposed litter.
- As soon as fallen organic matter/ litter layer is absorbed into humus, it is absorbed by growing vegetation.
- As rainfall exceeds evapo - transpiration, there is a downward motion of water through the soil.
- ZONAL SOIL
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