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Effekterna av urbanisering, barksprickedjup och solexponering på lavfloran i sydöstra Sverige
Linköping University, Department of Physics, Chemistry and Biology.
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
The effects of urbanization, bark fissure depth and sun exposure on lichens in south eastern Sweden (English)
Abstract [en]

Studies have shown that air pollution, as well as bark fissure depth and sun exposure of a tree can have an effect on lichen growth as well as abundance of lichen species. The aim of this study was to find out the relative importance of these factors. 211 oaks in south eastern Sweden were surveyed for presence of 17 lichen species, as well as the total number of lichen species. Half of the trees were situated in urban areas and half in the countryside. For each tree the bark fissure depth was measured and the sun exposure of the trunk was estimated. The results showed a significant negative effect on a majority of lichens growing in an urban environment and a significant positive effect on a majority of lichens growing on trees with deep bark fissures. The sun exposure was a less important factor but could not be excluded as a factor affecting lichen occurrence. These results show the negative effect urbanization can have on rare lichen species, as well as be used in the development and maintenance for the nature reserves containing them

Place, publisher, year, edition, pages
2011. , 12 p.
Keyword [en]
Lichen, oak, air pollution, bark fissure depth, sun exposure
Keyword [sv]
Lavar, ek, luftföroreningar, barksprickedjup, solexponering
National Category
URN: urn:nbn:se:liu:diva-69665ISRN: LiTH-IFM- EX—11/2521—SEOAI: diva2:430780
Subject / course
Life Earth Science
Available from: 2011-08-10 Created: 2011-07-12 Last updated: 2011-08-10Bibliographically approved

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