How humans threaten wildlife?
- Created by: yaycharlie
- Created on: 23-01-14 20:42
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- How humans threaten Wildlife?
- Unsustainable exploitation for human gain
- Food - hunted & overexploited for food
- dodo, passenger pigeon, cod, tuna
- Fashion - collected/hunted
- Crocodiles/ Alligators - Leather for bags/shoes Turtles - Shells for ornaments/ glasses frames Rhino - Horn for dagger handles Elephants - Ivory Wildcats - Fur coats
- Snow leopard - threatened by habitat loss & loss of prey species. Main threat - hunting for their skins. A snow leopard coat would require 6-10 skins and worth £30,000 on the black market
- Crocodiles/ Alligators - Leather for bags/shoes Turtles - Shells for ornaments/ glasses frames Rhino - Horn for dagger handles Elephants - Ivory Wildcats - Fur coats
- Pets & entertainment
- Tortoises, tropical fish, parrots, lizards, snakes
- Traditional medicines
- Tigers - claws as sedative, tail for skin diseases, dung for alcoholism. Snakes - arthritis & skin disease. Bear bile - fever & life disease.
- Food - hunted & overexploited for food
- Eradication of predators & competitors
- Species that threaten humans - sharks, poisonous snakes
- Predators that threaten livestock - wolves, lions, birds of prey
- Agricultural pests - insects, fungi
- Disease risks - malaria mosquito's, tsetse flies
- pests in forestry plantations - deer, beavers
- The Inability to survive habitat alteration
- Unintentional deaths caused by human activities
- Dolphins - by-catch of tuna fish. Animals in fields during crop harvesting, road kill
- Introduced species
- Predators - UK rivers: water voles killed by American Mink that escaped from fur farms. Australia: many species threatened by cane toad that were introduced to control insects in cane sugar
- Competitors - UK: grey squirrel introduced from North America, out competes the indigenous red squirrel as it's better at using food & carries squirrel pox that affects red squirrels
- Disease - Europe & N America: Elm trees been killed by a fungus from Asia. UK: signal crayfish introduced from N America carried a disease that kills indigenous white-clawed crayfish
- Changes in abiotic factors
- Species of river plants - farming / mining may increase turbidity of a river = reduced light penetration so no photosynthesis
- Crayfish & sensitive fish species: acid rain increases acidity of rivers & lakes. This can denature cell proteins & dissolve exoskeletons
- Habitat Destruction
- Deforestation - create farmland / exploit timber
- Flooding caused by reservoir construction
- Mining
- Urbanisation
- Unintentional deaths caused by human activities
- Unsustainable exploitation for human gain
- Furniture & Ornaments
- Unsustainable exploitation for human gain
- Food - hunted & overexploited for food
- dodo, passenger pigeon, cod, tuna
- Fashion - collected/hunted
- Crocodiles/ Alligators - Leather for bags/shoes Turtles - Shells for ornaments/ glasses frames Rhino - Horn for dagger handles Elephants - Ivory Wildcats - Fur coats
- Snow leopard - threatened by habitat loss & loss of prey species. Main threat - hunting for their skins. A snow leopard coat would require 6-10 skins and worth £30,000 on the black market
- Crocodiles/ Alligators - Leather for bags/shoes Turtles - Shells for ornaments/ glasses frames Rhino - Horn for dagger handles Elephants - Ivory Wildcats - Fur coats
- Pets & entertainment
- Tortoises, tropical fish, parrots, lizards, snakes
- Traditional medicines
- Tigers - claws as sedative, tail for skin diseases, dung for alcoholism. Snakes - arthritis & skin disease. Bear bile - fever & life disease.
- Food - hunted & overexploited for food
- Mahogany & teak - furniture Ivory - White piano keys Ebony wood - Black piano keys Coral & turtle / tortoise shells - jewellery
- Unsustainable exploitation for human gain
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