DRY AREAS

Distinguish between xerophytes and hydrophytes

• Xerophytes: adapt to conditions of drought

  Hydrophytes: have the ability to grow in water

• Xerophytes: adapt to dry areas

  Hydrophytes: have the ability to survive low rainfall

• Xerophytes: adapt to conditions of cold areas

  Hydrophytes: die in water

How do Larger animals cool they bodies ?

• They go for a swim

• They roll in mud

• They sweat and exhale warm moist air

• They sweat and exhale warm dry air

How do smaller animals keep thier body temperature constant ?

• Avoid the heat

• Lose about 20% of thier body mass

State 3 reasons why lichens play a significant role in the survival of animals ?

• Main food source for gazelle

  Provide moisture to antelopes

  Food for insects

• Main food source for cats

  Provide shelter for insects

  Food for insects

• Serve as a staple diet for the karoo

  Food for insects

  Main food source for rats

Both the Succulent karoo as well as the Fynbos have a large number of species. There are similarities in the climate of the two regions. State them

• Summer rainfall

  Good soil

• Winter rainfall good sand

• Winter rainfall winter soil

• Winter rainfall poor soil

Why are there no trees found in Etosha?

• Lots of winter rainfall and drying out

• The dry climate

• The brackish substrate formed by alternating flooding and drying out

Name 3 strategies that have been developed by plants to survive dry conditions?

• Succulents: store water

  Non-succulents: decrease evaporation surface

  Drought-escaping plants: have a very short and brief lifespan for a short period after a good rainfall

• Succulents: store rain

  Non-succulents: increase surface area

  Drought:-escaping plants: have a very long and brief lifespan for a long period after a bad rainfall

Explain the term dune straits

• "Chutes" between dunes

• "Chaunts" between dunes

• "Chats"

  between dunes

The word Karoo means ..

• Karusa

• dry barren, thirstland

• karusa, dry barren thirstland

Briefly describe the climate circumstances of this area ?

• Low/ No rainfall

• Low/ Rainfall

• High / some rainfall