Ecosystems

Question 1

What is a community?

Answer 1

-made up of populations of different species living in the same habitat

Question 2

What are populations made up of?

Answer 2

-individual organisms from a single species

Question 3

What is a habitat?

Answer 3

-the environment where a population or community lives

Question 4

Which factors may affect population growth?

Answer 4

-disease, food supply, predation

Question 5

What are quadrats used for?

Answer 5

-estimate the biodiversity of a habitat

Question 6

Define biodiversity.

Answer 6

-the variety of different species and the numbers of individuals within those species in a habitat

Question 7

What are transacts and what are they used for?

Answer 7

• a line across a habitat, usually placed using a tape measure
• used when there is a change, or gradient, in abiotic conditions across the habitat

Question 8

What is biomass?

Answer 8

-the total dry mass of living material in an organism multiplied by the number of organisms

Question 9

How much energy is transferred from the trophic levels?

Answer 9

-10%

Question 10

Steps of the carbon cycle.

Answer 10

-Carbon is removed from the atmosphere by producers who use it in photosynthesis.
By consuming plant matter, animals obtain carbon compounds.
Carbon is returned into the atmosphere because of the respiration that happens in plant and animal cells.
When animals and plants die, decomposers return the carbon locked in their bodies back to the atmosphere via decay