According to Rydzak hypothesizedthat in

According to Rydzak hypothesizedthat in contrast to rural areas, the lichen flora in cities is more influencedby the lower humidity, higher temperature and higher aridity of the urbanenvironment than by higher levels of pollution. From this informationthe random data collected can be explained as there are other uncontrolledvariables to observe.

Crustose Lichens are, as I mentioned in the introduction,one of the most tolerant lichens thus they can be found in the most regions in thecity. In the city center there weren’t many lichens to observe, one of thereasons for that is because most of the parks in Ankara are basically made upof grass and a big “desert” of rocks are not very easy to find. In the secondpark. The population difference and different species are very easilyrecognizable. Maybe the reason for that can be the bigger surface area of thepark and more humidity.

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As the distance from the city center increases thevariety of species of the lichens increase. In the last park, a totallydifferent type of lichen, Caloplaca is observed for the first time. This typeof specie is not as tolerant as other species, and it was near a river.Therefore, it can also have an affect on the population. 

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