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Question 4: The Living World Unit 1
Ecosystem The relationship between living things (biotic) and their non
living environment (abiotic/physical world).

Living = Vegetation / wildlife / bacteria
Non-Living =

Biome A world-scale ecosystem. It is found worldwide at similar
latitudes. The rainforests are one biome, Hot deserts are

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form low pressure belts that have all year
round rainfall. E.G. The equator and in the Geology (rock type), soils. relief, drainage of a water

High-pressure belts, air descends creating dry
conditions. e.g North and South Poles

Seasons affect pressure belts.

Climate in the key ecosystems

Rainforests Hot Deserts…

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Wide leaves to absorb sunlight

Deciduous Canopy trees grow very tall to Deep roots to reach different
Forest compete for sunlight layers in the soil. They access
minerals by breaking apart rocks
Herb layer flowers earlier to and leaching them.
maximise growth before leaves
block out sunlight

Characteristics of vegetation

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Soils in the ecosystems

Hot Desert :
Soils are rocky, sandy and grey in colour. They are thin and
can have a crust caused by impact of infrequent rainfall. Evaporation leaves
salt crystals in the soil.

Tropical Rainforest : Soils are red in colour and rich in iron. They are…

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Climate Vegetation

UK is maritime (on the coast) / Soils benefit from decomposition of organic
temperate. This allows certain material such as leaves which returns
plants to grow, e.g. deciduous. nutrients to the soil.

Varied vegetation provides habitats for
Rich vegetation due to fertile soils wildlife, food, shelter…

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Producer Eats the stage below it in thefood

chain. Can be herbivores, carnivores
or omnivores.

Uses sunlight, water and CO² to
produce chemical energy through
photosynthesis. All plant life.

What is it?

Hot Desert A hot desert is a barren area of land where little
precipitation occurs and consequently living…

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These tribes create a small and managed space so that they have room to farm and build their homes.
First by removing trees and then burning buttresses to fertilise the soil.

Because of the poor soil they have to migrate to a new location every 5 years.

This is called…

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Valuable raw materials are obtained.

The country becomes more economically developed.

While deforestation is economically beneficial, estimates show that conserving
rainforest land is more economically viable.

Brazil can use the taxes and exports to repay its $1.3 trillion debt


People may be opposed to deforestation, but governments won't want…

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Eco-tourism aims to turn a rainforest into an economic resource without the need for
deforestation. This provides locals with employment, educates visitors and ensures the
government becomes invested in preserving the rainforest. One destination is Una

Restoration is carried out byREGUA (Reserva Ecologica de Guapiacu),an NGO made

up of…

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· The National Forest was created in 1990, it is located between Leicestershire
and Derbyshire.
· It is a new forest and over7 million trees have been planted there. All trees
removed for timber are replanted to maintain the forests ecosystem.
· The forest supplies wood to meet Britain's needs.…


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