B1.4.2 - Environmental Change

Question 1

What affects the distribution of living organisms?

Answer 1

Changes in the environment

Question 2

What can environmental changes be caused by?

Answer 2

Living or non - living factors

Question 3

Who do environmental changes affect?

Answer 3

Animals and plants

Question 4

What are the living factors?

Answer 4

• food source
• predators
• nesting sites

Question 5

What are the non living factors?

Answer 5

• amount of rainfall
• amount of sunlight
• temperature
• pH of water/soil
• oxygen concentration
• water salinity

Question 6

What can distribution changes be measured by?

Answer 6

• non living indicators such as oxygen levels, temp + rainfall
• indicator species!

Question 7

How do indicator species help?

Answer 7

They’re organisms that only live in certain conditions so their presence or absence show how the environment has altered

Question 8

What do lichens indicate?

Answer 8

air pollution (because they grow in clean air, so a reduction indicates a rise in pollution)

Question 9

What can invertebrate animals be used as indicators for and why?

Answer 9

water pollution indicators and indicators of the concentration of oxygen dissolved in water as they live in water so a decrease indicates a rise in pollution

Question 10

What equipment can be used to measure oxygen levels, temp and rainfall?

Answer 10

Devices such as humidity sensors, pH meters, light meters, oxygen sensors