10.1 5 The effect of interactions betweem biotic and abiotic factors

Question 1

Density-independent factors impact

Answer 1

Same regardless of population size e.g extreme temperatures

Tend to limit distribution of individuals

Question 2

Density-dependent factor

Answer 2

Impact will depend on how many organisms in a specific area e.g disease limit abundance of species

Question 3

Competition

Answer 3

Individual organisms must compete for density-dependent factors

Question 4

When does competition occur

Answer 4

When two organisms compete for a resource that is in limited supply

Question 5

Intraspecific competition

Answer 5

Competition between members of the same species for a limited resource
As a result some individuals may not survive or reproduce

Question 6

If resources are plentiful

Answer 6

Little or no competition

Number of individuals will increase until there is competition

Question 7

Interspecific competition

Answer 7

When different species of the same community compete for the same resource
Reduce abundance of competing species