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Desert Period 3

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Desert

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Desert Period 3

  1. 1. DESERT   ALEX  BENVENUTI   OTHER  ALEX   ORLANDO  SENDON  
  2. 2. 0THER  Names   •  Desert   •  Temperate  Desert   •  Cold  desert   •  Wasteland   •  Coastal  Desert   •  Hot  and  Dry  desert   •  Semiarid  desert  
  3. 3. Biome  LocaBon   •  Located  around:   –   the  equator   – South  West  North  America   – Central  Asia   – Central/West  Australia   – South  East  Africa   – West  coast  of  Chile  
  4. 4. Map  of  deserts  
  5. 5. Climate   •  Hot  and  dry  desert-­‐     –  Maximum  temperature  49  degrees  Celsius   –  Can  get  as  low  as  -­‐18  degrees  Celsius   –  Soil  is  course-­‐textured  and  can  be  rocky  with  good  drainage   –  Some  years  can  be  rainless,  some  deserts  can  get  an  average  of  1.5cm   a  year,  like  the  Sahara,  others,  like  the  Mojave,  can  get  28cm   •  Semiarid-­‐   –  21-­‐27  degrees  Celsius  in  the  summer  during  the  day  Bme,  10  degrees   in  the  evening   –  2-­‐4cm  of  precipitaBon  annually   –  Sandy  soil   •  Cold  Desert-­‐   –  -­‐2  –  4  degrees  Celsius  in  the  winter,  21-­‐26  degrees  in  summer.   –  15-­‐26  cm  of  rainfall     –  Heavy  and  salty  soil  
  6. 6. Climate  Graph  
  7. 7. Nutrient  Cycle/Energy  Flow  
  8. 8. Animals/Plants   •  Animals:   –  Lizards-­‐Small  predator   –  Snakes-­‐Small  predator   –  Kangaroo  rats-­‐Primary   Consumer   –  Tarantula-­‐  Insect   –  Hawk-­‐Larger  predator   –  Kit  Fox-­‐Larger  Predator   •  Lible  Biodiversity,  small   amount  of  nutrients   supports  lible  life   •  Plants:   –  CacB-­‐  Stores  water,   Primary  Producer   –  Sage  Brush-­‐Primary   Producer   –  Thorn  Aracias-­‐Primary   Producer   –  Rabbit  brush-­‐Primary   Producer  
  9. 9. Food  Web  
  10. 10. Animals/  Plants  
  11. 11. Succession   •  Primary  succession  in  a  desert  occurs  on  sand   dunes  with  the  growth  of  a  pioneer  species,   bacteria.   •  These  bacteria,  when  sebled  into  a  sand  dune,   create  ferBle  soil  which  will  make  room  for  plants   to  grow  such  as  grass  and  cactuses.   •  Secondary  succession  in  a  desert  would  occur  if  a   flash  flood  were  to  eliminate  all  the  plant  life  in   an  area  but  leave  the  ferBle  soil  to  give  the   opportunity  for  these  plants  to  grow  back.  
  12. 12. MDC/LDC   •  MDCs  such  as  Saudi  Arabia  and  Australia  are  known  for   drilling  for  oil  and  creaBng  large  oil  reserves  which   destroys  the  environment  through  producBon  of   harmful  chemicals  and  destrucBon  of  natural  habitats   that  kill  important  desert  wildlife.   •  LDCs  such  as  Afghanistan  and  Pakistan  have,  over   many  years,  destroyed  their  natural  desert   environment  due  to  the  need  to  build  and  expand,  and   year  of  military  acBvity.  The  ferBle  regions  of  their   deserts  have  lost  much  of  their  nutrients  and  air   quality  has  become  very  poor.  
  13. 13. Human  Impact   •  Even  though  both  LDCs  and  MDCs  both   negaBvely  affect  the  environment,  the  key   difference  between  them  is  their  ability  to  fix  it.   MDCs  have  much  more  developed  economies   and  have  the  money  and  technology  to  curb  their   contribuBon  to  environmental  degradaBon.  LDCs,   on  the  other  hand,  are  not  as  developed  and  do   not  know  the  effect  they  have  on  the   environment  and  they  do  not  have  the  funds  to   stop  their  environmental  damage.  

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