cold environments + rainforests

• a disadvantage of commercial fishing in Alaska...

  • overfishing of species such as king crab - disrupts the food chains
• Adaptations of bearberries are...

  • bright red to attract pollinators
  • hairy stems which act as insulation and retain heat
• what percentage of alaska is accesible by road?

  20
• why can't oil be exported from the North in Alaska? How is this overcome?

  • thick sea ice in the winter
  • overcame by building the Trans-Alaskan pipe line
• what percentage of Brazil's CO2 emission comes from deforestation?

  75
• give an example of a hardwood tree

  mahogany
• what do rainforests act as?

  a carbon sink
• what's the mean annual temperature in Alaska? What can this lead to?

  -9

  • leads to frostbite
• why is Alaska's frozen sea a challenge?

  it makes it difficult to export
• how many people were employed for commercial fishing in Alaska?

  79,000
• how much money does the Tintina Gold Belt contribute to Alaska's GDP?

  $2.2 billion
• How many tourists visited Alaska? Why?

  2 million

  • glaciers, northern lights - boosts tertiary sector
• give adaptations of buttress roots

  • large and wide
  • allows the tree to maintain stability and grow high to reach the canopy layer for photosynthesis - high competition
  • nutrients from top soil --> rapid nutrient cycle
• give adaptations of drip tips

  • pointed leaves with a waxy surface so precipitation can run off. This prevents bacteria from growing
• how much precipitation falls per month in the rainforest?

  500-600mm
• give adaptations of Lianas

  • woody vines that grow around trees in the upper canopy
  • can reach sunlight for photosynthesis
• give adaptations of large leaves

  • plants in the shrub layer have a large surface area to absorb more sunlight for photosynthesis
• what percentage of sunlight does the shrub layer recieve?

  2