eco FINALLLL pt 4

• direct anthropoenic effect: hunting

  indirect: habitat destruction, climate change

  small fragmented pop either inbreedinf depression, extinction extirpation, demographic instability.
• island biota: vulnerable

  often had disease

  flightless

  not adapted to predator

  went extinct after new zealand colonization
• tropical deforestation

  chanhged land into agriculture land

  slash and burn method
• alien species: compete with native species

  usually dominate

  vascular plants most at risk and most secure
• COSEWIC

  extinct: gone forever

  extirpated: only gone in 1 location not entire world

  endangered: risk of the first two

  threatened: likely to become endangered

  species of special concern: can be threatened

  data insufficient: dk enough
• minimal viable po. mvp: least abundance for survival

  minimal viable area mva: least suitable for habitat

  
  

  theory of island: species on small patch of land most likely to become extinct
• keystone species: a species that is essential to the functioning of an ecosystem (otters eat urchins, helps kelp forest stay alive)

  flagship species: animal chosen for marketing to get help and support

  umbrella species: protection of species in its habitat protects other species (polar bear)