QCAA Biology - Unit 3, Topic 1

What does Species Richness mean?

• The abundance of organisms

• The number of different species

• The distribution of species

• The distribution of organisms

Species Evenness is a measure of the ________ _______ _________

What is the easiest way to measure percentage cover?

• You count the number of organisms and divide it by the space

• You estimate based on coverage in a quadrat

• You calculate percentage cover by measuring every organism

• You capture then recapture organisms

Percentage frequency is the probability that a species will be found within a single quadrat. Write the formula that is used to determine percentage frequency.

Biodiversity is recognised as the total variety of ...

• regions of surface and atmosphere occupied by organisms

• communities of organisms occupying major habitats

• species interrelationships, biotic and abiotic factors

• organisms, habitats, communities and ecological processes

• Sum of

• each organism

• the total number of species

• the total number of organisms

Environmental factors limit the distribution and _________ of species.

Biotic factors are the living components of an ecosystem, and the abiotic factors are the non-living components

• True

• False

Name an example of an abiotic factor:

Spatial differentiation is the measurement of species diversity, species interactions and abiotic factors over time

• True

• False