How Humans Threaten Wildlife

Deforestation Eutrophication Mining/ resource extraction Overfishing/ bottom trawling/blast fishing Agriculture/ food production

Steller’s sea cow - hunted to extinction Dodo - relied on by sailors - eaten by invasive species brought on boats Mammoths Bison

snake skin ivory leather tortoise shell coral jewellery bear skin leopard skin

poached for illegal trade bones are used in traditional medicine killed by farmers because they prey upon livestock captured as pets for entertainment deforestation has lead to habitat loss

seven £7,000

circuses sea world bullfighting safari parks horse racing

Mexico and Central America

Imitates human speech

population decreased by 90% half of all birds captured are thought to die in the process threatened by habitat loss

nest monitoring and protection illegal to trade them

Convention on International Trade in Endangered Species of Wild Fauna and Flora

all of the species that cannot be traded internationally

trade of these species is closely monitored and restricted - varies depending on the population in the area

Taxidermy Leather - seating Mahogany - wooden furniture Animal skin - rugs

Pangolins - keratin - scales and bones Tigers - whiskers/eyes/teeth - treats malaria and insomnia Sharks - fins - prevent heart disease/lower cholesterol

herbivores = damage crops diseases vectors (badgers - TB, mosquitoes - malaria) protected livestock protecting plants from damage via pesticides to protect human life/self-defense - e.g. from wolves/sharks/crocodiles

trampling roadkill by-catch ghost fishing combustion of fossil fuels - climate change eutrophication

boats - intentional/unintentional (ballast water) ornamental plants accidental transport with food escaped/abandoned pets species that have been used for food production (fish farms)

used in UK for furr farms escaped in 1960s affected water voles and seabirds destroyed nests/eaten eggs increased competition

introduced in Australia in 1935 as a biological control of beetles moved over 200km from introduced site affected northern quolls and large goannas produce a poison lay up to 50,000 eggs at a time - 15x the amount of the native toad

1870s - introduced to a park in Cheshire predated upon red squirrels brought squirrel pox damage trees increased competition for resources impacts were reduced by monitoring red squirrel populations and by re-introducing pine martin (eat grey squirrels)

1970s - brought from North America farmed for food escaped from farms into fresh water carried crayfish plague grow faster than indigenous crayfish - grow larger tolerant of changing conditions

1890s - added to gardens affected oak trees/beech trees out compete plants for nutrients and light poisonous leaves - damage herbivores fast growing

1960s - brought over in plants accidentally affect earthworms, birds, badges, voles disrupt food chain - slow decomposition - lower soil quality - lower crop yield - increase food risk