L8 - The Biotic Enviroment

Question 1

What 3 areas within a species are effected by biotic factors?

Answer 1

Reproduction, Co-operation, competition

Question 2

What effects does a) low population density b) high population density, have on reproduction?

Answer 2

a) LPD - may not find a mate

b) HPD - increased chance of competition

Question 3

Define intraspecific competition

Answer 3

Competition between members of the same species

Question 4

What causes intraspecific competition

Answer 4

Members of the same species have similar requirements for survival, growth and reproduction

Question 5

In the context of intraspecific competition, what is a) exploitation b) interference

Answer 5

a) members don’t interact directly, they instead respond to a level of a resource
b) members interact directly - one physical prevents another from exploiting a resource (space, mating partner). This may occur even if the resource is plentiful

Question 6

What is the carrying capacity of a population?

Answer 6

Carrying capacity:

Birth Rate = Death Rate

Question 7

What is territoriality a consequence of?

Answer 7

Intraspecific competition