Betydelsen av bebyggelse, barksprickedjup och solexponering för eklavfloran i Linköpings stad med omnejd
Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesisAlternative title
The significance of habitation, bark crack and sun exposure on oak lichen flora in Linköping and its surroundings (English)
Lichens have long been used as indicators for monitoring air pollution, due to the fact that they are sensitive for changes in air quality. Other factors that influence the lichens growth is sun exposure and substrate age. Several studies in other countries show that the lichen diversity is larger in the outline region of larger cities than in the city center.
The purpose of this study was to study the effect of urban areas, sun exposure, tree age and tree perimeter on lichen flora. The fieldwork was done on 211 oaks, half of which where located in an urban environment and the other half in a rural environment. In total, 19 species of lichens where studied and half of them where red-listed species or rare, like Chaenotheca phaeocephala, Cliostomum corrugatum and Calicium adspersum. The total number of species and the presence of the specific species were noted. The analysis showed that the majority of the species were negatively affected by the urban environment. The results also show that the occurrence of rare lichen species was higher on older oaks.
Place, publisher, year, edition, pages
2011. , 12 p.
Oak, lichen, bark crack, sun exposure, urban environment
IdentifiersURN: urn:nbn:se:liu:diva-71710ISRN: LITH-IFM-A-EX--—11/2514—SEOAI: oai:DiVA.org:liu-71710DiVA: diva2:453266
UppsokLife Earth Science
Bergman, Karl-Olof, Doktor