19 - Population in ecosystems

Question 1

Define a community.

Answer 1

Populations of different species.

Question 2

Define a climax community?

Answer 2

A stable community of populations of different species.

Question 3

Define a species.

Answer 3

Can breed together and produce fertile offspring.

Question 4

A species is uniformly distributed. What is meant by uniformly distributed?

Answer 4

Same number of organism in each region equally spread.

Question 5

Define an ecosystem.

Answer 5

A community and the non-living components of its environment.

Question 6

A niche occupied by a species is defined by what?

Answer 6

Adaptation to abiotic and biotic conditions.

Question 7

Give three types of adaptation.

Answer 7

Anatomical
Behavioural
Physiological

Question 8

Define carrying capacity.

Answer 8

The maximum stable population size of a species an ecosystem can support.

Question 9

What are the three methods for sampling?

Answer 9

Quadrats
Belt transects
Mark-release-capture

Question 10

Describe and explain how succession occurs. (4)

Answer 10

Colonisation by pioneer species
Pioneers change conditions
More suitable for new species
Change in biodiversity
Climax community

Question 11

Why does conservation affect succession.

Answer 11

To preserve species that would other be made extinct by the climax community being established.