4.3

objective 4.3- descibe the use of quadrats as a technique for sampling the
distribution of organisms in their habitats.



sample has to be random
so it is not bias.
a sample also needs to be representative
so the samples need to cover a wide area

number the strings in a quadrat 1-10 (if ten strings)

select 2 random numbers.

then use these to selsct a square to count the organisms.

repeat this 10 times and divide the number of all the organisms together by 10 if repeating this 10 times. preferably cover 10% of the area you are surveying