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TLE - Threats to biodiversity (1)

A Level Environmental Science revision / Make connections to the physical environment + pollution (you know the missing stuff)
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stwvlker
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Last updated: May 24, 2025
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First submittedMay 24, 2025
Times taken8
Average score93.5%
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Threats to biodiversity
Direct exploitation
Threats to biodiversity
Habitat destruction
Threats to biodiversity
Deliberate eradication
Threats to biodiversity
Abiotic changes
Threats to biodiversity
Biotic changes
Direct exploitation
Food
Direct exploitation
Fashion
Direct exploitation
Furniture
Direct exploitation
Entertainment
Direct exploitation
Medicine
% of haddock from the north sea
80
Levels found beneath MSY in X by X
2016, Marine Stewardship Council
Dodo bird island
Mauritious
Dodo bird known years
1598-1662
Dodo features
Ground-nesting
Dodo features
Fearless
Dodo features
No natural predators
Threats to dodo birds
Hunting
Threats to dodo birds (2)
Cats, dogs
Fashion purposes
Fur coats
Fashion purposes
Leather bags
Fashion purposes
Feathers
Python trade /year
$1 million
Number of mink farms +year
400, 1950s
American mink reduced water vole populations by...
94%
Pianos used to be made with...
Elephant ivory
Pianos used to be made with...
Tropical ebony
Jewellery made from...
Shark teeth
20th century furniture
Elephant feet
20th century furniture
Rhino horns
Tiger skin rugs can only be sold if made after...
1947
Entertainment purposes
Pets
Entertainment purposes
House plants
Entertainment purposes
Aquaria
Entertainment purposes
Zoos
Entertainment purposes
Circus
Entertainment purposes
Big game hunting
________ are removed form their _______, _______, and hit with ___ ____ to _______ _______
Elephants, mother, restrained, bull hooks, establish dominance
___ ______ are captured to ______, kept in small spaces against their _____ to ____, and cannot use ___________
Wild dolphins, perform, instinct, roam, echolocation
Dolphin health impacts
Eye irritation
Dolphin health impacts
Sunburn
Dolphin health impacts
Stress ulcers
____ bear bile farms in China producing _____kg/year to treat ______, ____, ______, and more.
7000, 10000, asthma, burns, cancer
________ is extracted from _______ _____ to reduce symptoms of the ________ and risk of ____ _____
Premarin, pregnant horses, menopause, colon cancer
Habitat destruction
Direct
Habitat destruction
Indirect
Habitat destruction
Fragmentation
Habitat destruction
Degradation
Causes of fragmentation (2)
Bisector, isolation
Deliberate eradication
Threatening animals
Deliberate eradication
Pathogen vectors
Deliberate eradication
Livestock predators
Deliberate eradication
Agricultural pests
Deliberate eradication
Forestry pests
Deliberate eradication
Wild herbivores
Eradication case study
Macquarie Island
______ _____ destroyed ___ ______, so native bird populations fell.
Grazing rabbits, bird habitats
Rabbits attempted to be eradicated in...
1960s
___ lost their main ___ _____ and began eating __ ___
Cats, food source, sea birds
Cats eradicated between
1985-2000
Rabbit population grew __________ with no ______ _______, so bird populations fell again
Exponentially, natural predators
Remedial work cost
$16.2 million
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