Ecologists study the distribution of living organisms in habitats to find out how healthy it is. They use many different sampling methods to provide quantitative data which is then analysed.
Which of these would be sampled using a pooter?
Which equipment would be the best to use to sample the organisms living in long grass?
What is the mean, to one significant figure, of these numbers? 2,3,4,4,5,5,6,7,8,9,10
What is an ecologist?
A scientist that studies habitats
A scientist that studies genes
A scientists that prescribes medicines
What is the mode?
The middle number of an ordered sequence
The most common value in a data set
The largest minus the smallest value of a dataset
Why do ecologists estimate the number of organisms in a habitat by sampling?
It takes too long or is not possible to count every single organism in the habitat
Estimates are the least accurate way of knowing which organisms are in a habitat
The method introduces bias which improves their data
A student used a quadrat to estimate the number of daffodils in a field. The mean number of daffodils per quadrat was 6, the quadrat area was 0.5m2 and the whole field was 50m2. Calculate the estimate.
Which of these is an abiotic factor?
Number of predators
Number of bacteria
Which of these is an assumption you make when using capture-recapture?
There is no death of the organisms
There is death of the organisms
The organisms have moved to another habitat
How could you make sure you randomly place a quadrat on a field?
Divide the field up into a grid and generate coordinates
Throw the quadrat
Choose where to place the quadrat