For the past two weeks i have been studying Lichens. Initially i didn't know what they were neither did i know their importance. Here is the basics you should know about Lichens.
Lichens are a formation of fungus and algae that are tightly bound together. They share a symbiotic relationship where both of them may benefit from one another. The fungus provides nutrients for the alga of which some of it aids the alga to carry out photosynthesis and in the process manufacture carbohydrates for the fungus.
Areas exposed to a greater extent of sunlight have fewer lichens growing.
Dampness is a factor contributing to increased lichen growth.
Factors that may affect lichen growth:
Is there a shade cover over the area investigated?
Was one of the fence railings exposed to the rain?
Were some fences treated to inhibit fungi or algae growth?
Were any of the fences chemically treated to inhibit fungi or algae growth?
What time of the year (in terms of season) is it?
Type of wood used in the fence does it vary?
Amount of sulfur dioxide present in the air at different points of the area covered.
Below are images from my investigation.
mage A-This was under a shaded damp area which provided a suitable environment for lichen growth
Image B-This was under direct sunlight. Direct sunlight may hinder lichen growth because it may cause them to dry up faster.
Image C- On the lower side of the fence (Right Side) there was more lichen growth. This is probably because its closer to the ground hence it retains more moisture and tends to be more damp.
Also the upper fence casts a shadow on the lower fence hence it doesn't have much direct contact with sunlight.
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