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

- 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?

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

- 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?

- 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

- 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?

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