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	30
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

Hint	Answer
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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