habitat destruction, introduction of invasive species, pollution, overharvesting, hunting and climate change
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Factors for Red List
population size, degree of specialisation, distribution, reproductive potential and behaviour, geographic range and degree of fragmentation, quality of habitat, trophic level, probability of extinction
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extinct
no longer survives on Earth
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extinct in the wild
only survives in zoos or botanic gardens
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Threatened
umbrella term for Critically Endangered, Endangered and Vulnerable species
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Causes of Tropical Deforestation
Over-intensive shifting cultivation; Timber extraction; Over-collection of fuelwood for cooking and heating, and for making charcoal; Encroachment and clearance by landless peasant farmers; Clearance for pasture or crops, promoted by cheap land and government tax and financial incentives to encourage international investment - this includes Biofuels like Palm Oil and Sugar Cane
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