MODULE 6 B Flashcards

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1
Q

weed

A

a plant growing in the wrong place
- many grow rapidly & provide cover for foxes, rabbits, or other introduced species
- may degrade native animal habitats
- ornamental (garden) species can become weeds if they spread into native bush

can displace native fungal species

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2
Q

cane toads

A
  • the poster child of introduction failure
  • introduced into Australia in 1935 to control the cane beetle population
  • but they do not eat cane beetles at the to p of the sugar cane because they cannot climb well
  • animals would eat the cane toads & became a significant challenge to native Australian animals today
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3
Q

some introductions are unintentional

A

e.g. Ballast water from ships = at least 70 varieties of fish, worms, molluscs, seaweed, and toxic algae

microbes as well - through industrial shipped good

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4
Q

Indigenous land management practices

A
  • shaped the Australian environment
  • e.g. fire-based land management
  • fish traps at Lake Condah
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5
Q

As a consequence of natural and long-term Indigenous fire use, many Australian plants are

A

specifically adapted for fire

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6
Q

Controlled, cool, patchy burns

A
  • patchwork burning in early fire seasons thins out young shrubs and trees while preserving the canopy and encouraging growth of new grass
  • contrast to the effect of intense late season fires, or even prescribed burns
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7
Q

When did changes start?

A

with the birth of agriculture and the associated urban populations
domestication of plants and animals occurs in multiple sites worldwide beginning 10,000 years ago

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8
Q

what is domestication?

A

involves one species controlling the reproduction and breeding of a 2nd species, generally to its own benefit
e.g. 6 closely related species of great economic importance worldwide (cauliflower, broccoli)

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9
Q

In plants, domestication is often associated with. . .

A

hybridization and / or increased numbers of chromosomes (tetraploid vs hexaploid for example)

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10
Q

domestication causes. . .

A

morphological + behavioural changes

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