Do you know how to sample ecosystems?
Environmental Sampling Quiz
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#1. Which are the two kinds of sampling we normally use?
Select all that apply:
#2. What do we mean by the distribution of organisms?
#3. Complete the equation used to calculate population size: population size = .............. x total size of it habitat / total area of quadrats
#4. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?
#5. How can we increase the accuracy of abundance estimates?
#6. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?
#7. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?
#8. What does abundance measure?
#9. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.
#10. We sometimes use a transect to perform systematic sampling. This involves which of the following?
#11. Which square instrument do we use for randomly sampling population sizes?
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