changes in the enviroment

• What should you be able to evaluate by the end of this video?

  The impact of environmental change on species distribution
• Who is the target audience for this video?

  Triple biology higher-tier students
• Are specific organisms required to be learned in the specification?

  No, specific organisms are not required
• What are the three abiotic factors mentioned?

  Temperature, availability of water, gas composition
• How can changes in abiotic factors affect species distribution?

  They can alter where species can survive
• Where does the desert fox live and what is it adapted to?

  North Africa; hot desert conditions
• Why does the desert fox have large ears?

  To increase surface area for heat loss
• Why is the red fox found in Europe instead of the desert fox?

  It is adapted to cooler conditions
• What adaptation does the arctic fox have for cold conditions?

  Very small ears to reduce heat loss
• How does temperature show geographic variation?

  Different species adapt to different temperatures
• What type of plants are found in deserts where water is scarce?

  Cacti adapted to dry conditions
• What happens to plant distribution as water availability changes?

  Different plants adapt to varying water levels
• What do wildebeest in Africa follow during migration?

  Rainfall patterns for better grazing
• Where do swallows migrate during winter?

  Africa from the UK
• How does human activity influence atmospheric gases?

  By producing pollutants like sulfur dioxide
• What are lichens sensitive to?

  Sulfur dioxide in the air
• Where are the largest numbers of lichens found?

  In unpolluted air
• What happens to dissolved oxygen levels when sewage enters streams?

  They can decrease, harming organisms
• Which organism cannot live in low oxygen conditions?

  Mayfly larvae
• What can happen to populations of species due to low oxygen levels?

  Populations can fall significantly
• What are the key ideas illustrated in the video regarding species distribution?

  • Impact of abiotic factors
  • Geographic variation in species
  • Seasonal variation in populations
  • Human influence on abiotic factors
• What are the effects of abiotic factors on species distribution?

  • Changes in temperature affect habitat suitability
  • Water availability influences plant types
  • Seasonal changes lead to migration patterns
  • Human activities alter gas compositions