Bio resources - Forests

A Level Environmental Science revision

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Last updated: May 31, 2025

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First submitted	May 31, 2025
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Hint

Answer

% earth cover

Timber features

High strength:weight ratio

Timber features

Flexible

Timber features

Little processing

Paper is made from...

Flattened sheets of interwoven cellulose fibres from pulped wood

Rayon is made from...

Chemical treatment of cellulose

Food resources

Livestock fodder

Food resources (2)

Fruit, nuts

Food resources

Bushmeat

Food resources

CWRs

Cellulose has a long...

Residence time

Cellulose is...

Hard to digest

Hydrosphere regulation

Precipitation downwind

Hydrosphere regulation

Interception

Hydrosphere regulation

Deep soils retain water

Microclimate features

Low wind velocity

Microclimate features

High humidity

Low albedo increases...

Sunlight absorption

Heat in ____ in ____ _______ ____ at ____

Water, wood, radiates heat, night

Floor plant adaptations

Early bloom

Floor plant adaptations

Denser chlorophyll

Floor plant adaptations

Additional photosynthetic pigments

Factors increased biodiversity

Stratification

Factors increased biodiversity

Tree species

Factors increased biodiversity

High primary productivity

Soil conservation

Formation

Soil conservation

Erosion

Vegetation contributes

Food for biota

Vegetation contributes

Humus

Vegetation contributes

Nutrients

Pollarding height

1.5-3m

UK non-indigenous species

Sitka Spruce

UK non-indigenous species

Douglas Fir

Non-indigenous species

Better adapted to abiotic conditions

Non-indigenous species

Less likely to suffer from disease or pests

Non-indigenous species

Less likely to support indigenous wildlife

Close planting increases

Light competition

Close planting results in...

Tall, straight trees

Close planting inhibits...

Growth of floor plants

Forest area lost to deforestation

1/3

Agricultural expansion:

Clearance for commercial cash crop

Transport infrastructure impacts

Wildlife barrier

Transport infrastructure impacts

Fragmentation

Transport infrastructure increases...

Clearance rates

Types of unsustainable exploitation

Timber

Types of unsustainable exploitation

Fuel

Types of unsustainable exploitation

Livestock fodder

______ __________ reduces _____ ____, increasing ________ to satisfy ______

Partial combustion, energy value, clearance, demand

Forest resources are ________ but can be _______

Renewable, depleted

_______ _____ has the _______ _____ over ______ ______

Selective logging, maximum benefit, longer periods

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