Population Ecology

CHAPTER 9

BIOLOGY F5 KSSM

Quadrat Sampling Technique for estimating population size

• Parameters of Sampling Quadrat;

• frequeancy . density. coverage

Multiple Choice

The following information shows a type of epiphyte in a habitat.

Habitat: Tree trunk

Type of epiphyte on tree trunk: Unicellular algae, Pleurococcus sp.

Which of the following is most suitable to estimate the coverage percentage of Pleurococcus sp.?

• A transparent quadrat of 1 cm x 1 cm

• A transparent quadrat of 10 cm x 10 cm

• A iron frame quadrat of 10 cm x 10 cm

• A wooden frame quadrat of 10 cm x 10 cm

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Calculate the frequency of the following data.

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Calculate the density of the following data.

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The above five quadrats show the coverage of palnt X on a school field. What are the coverage percentage of plant X?

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10 quadrats with the measurement 1m x 1m are randomly placed to study the distribution of Mimosa pudica in a school field.
Calculate the density by using the data given.

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10 quadrats with the measurement 1m x 1m are randomly placed to study the distribution of Mimosa pudica in a school field.

Calculate frequency percentage by using the data given.

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10 quadrats with the measurement 1m x 1m are randomly placed to study the distribution of Mimosa pudica in a school field.

Calculate the coverage percentage by using the data given.

capture-mark-release-recapture

to estimate population size

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A woodlice habitat is identified as the study area. Ali used the method capture-mark-release-recapture to estimate the population size. The following is the data obtained by Ali.

Number of woodlice in the first catch : 38

Number of woodlice in the second catch : 56

Number of marked woodlice in the second catch : 28

Calculate the population size of the woodlice.