How humans threaten wildlife Flashcards

1
Q

How do humans deliberately exploit wildlife

A
  • deforestation
  • combustion
  • take for medicine
  • hunting
    -pollution
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2
Q

What example is used for the unsustainable exploitation for food

A
  • the dodo became extinct because of deforestation and hunting
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3
Q

Examples of unsustainable exploitation for fashion

A
  • elephants
  • rhino
  • snake skin
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4
Q

How and why have humans exploited snow leopards

A
  • killed by farmers if their livestock is endangered
  • hunt and kill their prey
  • habitat loss
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5
Q

Examples of unsustainable exploitation for pets and entertainment

A
  • force bears, elephants and tigers in circuses to perform confusing and physically demanding tricks
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6
Q

How and why have humans exploited the yellow headed parrot

A
  • they are sold and captured in pet trade
  • it has undergone a 90% population decline since the mid 1970’s to 7000 birds in 1994
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7
Q

How have yellow headed parrots been protected

A
  • TIDE’s terrestrial team have set up an artificial nest box program to offer greater protection and increase in survival
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8
Q

What is CITES

A
  • the convention on international trade in endangered species of wild fauna and flora
  • appendix 1: all species where international trade is banned
  • appendix 2: trade is closely monitored and restricted
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9
Q

Examples of unsustainable exploitation for furniture and ornaments

A
  • leather
  • taxidermy
  • animal skins
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10
Q

Examples of unsustainable exploitation for traditional medicines

A
  • bears - bile - used in fevers, heart diseases
  • tigers - bones, teeth etc - malaria, insomnia
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11
Q

Examples of eradication of predators and pests

A
  • eradicate a vector disease
  • protect livestock
  • mosquitoes and malaria
  • animals that threaten humans
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12
Q

What are the unintentional harm by other activities

A
  • trampling
  • roadkill
  • littering
  • urbanisation
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13
Q

How have species been introduced to non-native areas

A
  • been transported by boats
  • by ballast water
  • climate change causing migration pattern change
  • escaped or abandoned pets
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14
Q

2 examples of introduced species

A
  • american mink - were brought to the uk to be used in fur farms and were released by activists - they were very territorial and aggressive
  • grey squirrel - introduced in 1876 as they looked very exotic - they outcompeted red squirrels and damaged trees
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15
Q

What’s the definition of biotic

A
  • relating to or resulting from living organism
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16
Q

What’s the definition of abiotic

A
  • physical rather than biological ; not derived from living organisms
17
Q

What are the 6 abiotic factors that humans change

A
  • water availability
  • dissolved oxygen
  • temperature
  • ph
  • water turbidity
  • physical damage
18
Q

How do humans change water availability

A
  • agriculture = ^ irrigation
  • climate change = melting ice caps
19
Q

How do humans change dissolved oxygen

A
  • ^ eutrification - fertilizers get into water
  • temperature -colder water dissolves more oxygen
20
Q

How do humans change temperature

A
  • climate change - increase in CO2
  • releasing hot fluids from power stations
21
Q

How do humans change ph

A
  • combustion of ff - ocean acidification - more CO2 dissolved in water
  • burn coal, sulphur, sulphur dioxide - acid rain
22
Q

How do humans change water turbidity

A
  • pollution - releases pollutants into water ways - ^ turbidity
  • decreases turbidity - building dams - slows flow of water
23
Q

How do humans change physical damage

A
  • clearance for development
  • dropping litter
24
Q

Activities that destroy habitats on a large scale

A
  • dredging
  • destructive fishing
  • urbanisation
  • deforestation
  • combustion of ff