6.6.1 What Determinds Population Size

Question 1

What is carrying capacity?

Maximum pop

Answer 1

The maximum population size maintained over a period in a particular habitat

Question 2

When drawing a graph of population size and carrying capacity overtime, what does A, B and C represent?

Reproduction, growth,
resources, population size
Mortality.

Answer 2

A: lag phase (are reproduction is slow growth is slow)
B: log phase. (resources are plentiful. Population size increases, rates of reproduction increases.)
C: stationary phase (population size reaches current capacity rates of reproduction and mortality are equal)

Question 3

What are limiting factors? 4

Answer 3

•Change of temperatures
•Resources: food, water, light, oxygen, nesting sites
•Predator
•Parasites/diseases

Question 4

What are the types of strategies?

Answer 4

R-strategies
K-strategies

Question 5

And which strategy are used by larger mammals, such as humans, elephants and larger plants?

Answer 5

K-strategies

Kk- human text

Question 6

What strategy is used by infects, spiders and weed?
What do they have in common?

Answer 6

R-strategies

They reproduce rapidly

Question 7

What are the characteristics of K-strategies? 5

Answer 7

Low reproduction rate
Slow development
Late reproduction rate
Long lifespan
Large body mass

Question 8

Characteristics of R-strategies? 5

Answer 8

High reproduction rate
Quick development
Young reproduction rate
Short life span
Small body mass

Question 9

What is the ‘boom’ and ‘burst’ referring to?

Reproduction
Cc
Resources

Answer 9

‘Boom’ - when the population size increase (reproductive rate)
‘Burst’ - once pop exceeds carrying capacity no enough resources to allow individuals to reproduce so they decline