Abiotic and Biotic factors

Question 1

Examples of abiotic factors

Answer 1

• moisture level - wind intensity and direction
• light intensity - Oxygen level-aquatic animals
• Temp - Soil pH and mineral content
• co2 levels ( plants )

Question 2

What can changes in environment lead to ?

Answer 2

increase or decrease in abiotic factors = affect population size in community = effect population size of other organisms that depend on them

Question 3

Example

Answer 3

decrease in mineral content of soil -> nutrient deficiencies -> affect plant growth -> decrease in population size

Question 4

What are the biotic factors ?

Answer 4

1) new predators arriving 3) New pathogens
2) competition - one species outcompete other = numbers too low to breed
4) Availability of food

Question 5

What can changes in environment also lead to ?

Answer 5

introduction of new biotic factors = affect population size in community = which can have knock-on effects because of interdependence

Question 6

Example

Answer 6

new predator cause decrease in prey population,