week 9 Flashcards

1
Q

What is the Intrusive element in Australian flora?

A

Species that arrived after the separation of Gondwana

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the Gondwanan element in Australian flora?

A

derived from the flora of Gondwana relict(unchanged); and autochthonous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When do Land plants first appear?

A

470 Mya

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Quaternary phenomena which shaped the composition and distribution of today’s vegetation?

A

Dramatic climate changes (glacial/inter glacial)
Migration of people from Asia: Fire
Transplantation of European technology and exploitation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Many unique features of Australian environments?

A
  • Very high proportion of species (but not families) endemic to the continent
  • Two large tree and shrub groups (eucalypts and acacias) dominate almost all the plant associations of the continent (but limited occurrence elsewhere in the world)
  • Vegetation types that do not fit into other global classifications (sclerophyll forest, mallee woodland and hummock grassland)
  • Deciduous habit is very rare
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is Mallee?

A
  • Dominant vegetation in semi-arid regions (with winter rainfall)
  • Multiple stem Eucalypts
  • Flat to undulating landscapes on sandy soils, old sand dunes, heavy clay or rocky calcareous soils
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Sclerophyll Forest?

A

Dominated by trees that have thick and leathery leaves (Eucalyptus, Acacia, Banksia)
Typical ‘bush’ habitat
Undulating to hilly well-drained country, generally within the 450–650 millimetre rainfall area, with cool winters and warm to hot summers. Soils are usually grey-brown and brown podzolic with an acid reaction and are free of lime and strongly leached.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Hummock Grassland?

A

Dominated by Triodia
Arid lands, characteristic of the Australian outback
Hummock-forming, evergreen perennials appear as mounds up to 1m in height. In between the mounds or hummocks the ground is usually bare or exposed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a Population?

A

(All the individuals of a species in

a specific area; metapopulation – at all areas)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a Community?

A

This includes all the populations
of different species in a specific area at a
given time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is an Ecosystem?

A

The community + interactions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a Biome?

A

Major communities of the world –classified by predominant vegetation and adaptations to abiotic conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the National Vegetation Information System (NVIS)?

A

a repository for spatial data and associated thematic information on Australian native vegetation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what does thermal imaging measure?

A

Measuring energy fluxes to and from canopies and land surfaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly