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Investigating the growth of pleurococcus on tree trunks Factors to consider/have an effect * Type of tree * Height * Light intensity * Temperature Observations Preliminary method * On your tree, use a compass to find out which side of the tree is north. * Then place your grind against the tree trunk and count how many squares have growth on them. * Write your results down in a table and repeat for east, south and west. Preliminary results Tree number Site 1 North Site 1 East Site 1 South Site 1 West Site 2 North Site 2 East Site 2 South Site 2 West 1 25 24 4 25 9 1 12 4 7 20 11 25 13 25 13 16 18 5 22 25 22 23 5 3 0 1 4 25 20 11 13 25 13 18 16 Total 87 71 76 74 60 27 53 39 Preliminary information Pleurococcus is the most common green algae and grows on the tree trunks, poles and stonewalls. It is mostly found on the north side of the trunk at the bottom. To grow it needs a lot of, moisture and shade although it still needs sunlight and water like most trees and plants. However green algae do not have any roots. They do not have any leaves or stomata therefore...

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