problem solving workshop 1 (lecture 12) Flashcards Preview

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Flashcards in problem solving workshop 1 (lecture 12) Deck (3)
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1
Q
  • Australian outback
  • road-side corpse of a small mammal
  • considered extinct for 100 years
  • last recorded 500km away in similar habitat

What information is need to determine its status & threats, and how do you collect this?

  • what is known/can be inferred?
A

What is known or can be inferred?

  • recorded at 2 locations (may be extinct in one)
  • probably a habitat specialist (found previously in a similar habitat)
  • probably localised/small population (people didn’t know they were there)
  • probably killed by vehicle collision (road side)
  • in Australia – massive habitat loss &
    fragmentation, lots of introduced predators &
    competing grazers
2
Q
  • Australian outback
  • road-side corpse of a small mammal
  • considered extinct for 100 years
  • last recorded 500km away in similar habitat

What information is need to determine its status & threats, and how do you collect this?

  • what needs to be known?
A
  • distribution & population size & habitat selection
  • is it suffering from habitat loss or fragmentation?
  • is it suffering from competition with non-natives?
  • is it predated by non-natives?
  • are roads a major problem?
  • is it suffering from small population size?
3
Q
  • Australian outback
  • road-side corpse of a small mammal
  • considered extinct for 100 years
  • last recorded 500km away in similar habitat

What information is need to determine its status & threats, and how do you collect this?

  • how can this information be collected?
A

distribution, population size & habitat selection
- can be worked out via random stratified survey

habitat loss or fragmentation
- compare population densities and young:adult ratios in patches of different sizes

competition with non-natives/predation by non-natives

  • compare areas with & without non-natives
  • may have to be artificially created

are roads a major problem
- compare close to roads with those further from roads

small population size
- measure genetic diversity in found corpse, compare with similar species or museum specimen