Adaptations for Survival: Environmental Change Flashcards
What are environmental changes caused by?
- living factors
- non-living factors
Living factors
- predators
- infectious diseases
- prey/food supply
- competitors
Non-living factors
- temperature
- rainfall
- oxygen levels
- light
- air/water pollution
How do environmental changes affect population?
- increase
- decrease
- distribution
What would happen to the population if the number of prey increases?
- population increase
- more food - more predators survive and reproduce
What could affect the population of bees?
- pesticides
- changing flowering patterns: less food
- disease from parasites
- mobile phones - affect navigation systems
What could affect the population of birds?
- temperature
What is the problem of a population decrease in bees?
- honey more expensive
- flowers not pollinated
What will happen if the cause of environmental change for the bees is not discovered?
- honeybees continue to decline
- species of plants
Where do the birds fly if the temperature rises?
- fly further north
- problem: more competition for other birds
What name is given to species which are used to show the effect of human activities due to environmental changes?
indicator species
What type of pollutin do lichen indicate?
air pollution - concentration of sulfur dioxide
How does the number of lichen reflect the air pollution?
more lichen, cleaner the air
What do invertebrate animals indicate?
water pollution - concentration of dissolved oxygen
How do invertebrate animals show changes in water pollution?
- wider range of invertebrates show clean water
- certain invertebrates only live in polluted water
