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- Lättman, Håkan, 1958-
(författare)
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Studies on spatial and temporal distributions of epiphytic lichens
- 2012
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Lichens are an important group of organisms in terms of environmental issues, conservation biology and biodiversity, principally due to their sensitivity to changes in their environment. Therefore it is important that we develop our understanding of the factors that affect lichen distribution. In this thesis, both spatial and temporal distributions of epiphytic lichens at different scales have been studied in southern Sweden.Generation time of the red-listed lichen Cliostomum corrugatum was examined using Bjärka-Säby as the study site. The results showed that the average age of an individual of C. corrugatum is 25–30 years at the onset of spore production.The rarity of C. corrugatum was also examined. DNA analysis of an intron from 85 samples, collected at five sites in Östergötland, yielded 11 haplotypes. Results from coalescent analysis, mantel test and AMOVA indicated that C. corrugatum have a high ability to disperse. The study concluded that its rarity is most likely connected with the low amount of available habitat, old Quercus robur.The changes in the distribution of epiphytic lichens in southern Sweden, between 1986 and 2003, were also compared. For each year a centroid was calculated on all combinations of tree and lichen species. The three significant cases showed that the centroid movement pointed toward a north-east or north-north-east direction.Finally differences in species richness and cover of lichens on large Q. robur were examined between urban and rural environment. The results demonstrated that species number and percent cover was significantly higher on oaks standing rural compared to oaks standing urban. Effects of urban sprawl showed a decline in species richness and cover with increasing age of the surrounding buildings.
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| 2. |
- Lättman, Håkan, 1958-
(författare)
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Studies on spatial and temporal distributions of epiphytic lichens
- 2010
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Lichens are an important group of organisms in terms of environmental issues, conservation biology and biodiversity, since lichens are sensitive to changes in their environment. Therefore it is important that we develop our understanding of the factors that affect lichen distribution. In this thesis both spatial and temporal distributions of epiphytic lichens at different scales have been studied in southern Sweden.Brokind was chosen as the study site to investigate the succession of epiphytic lichens on Quercus robur using a chronosequencial approach. Fourteen of the investigated taxa out of 50 proved to be significant. The taxa were divided into three groups according to whether they occurred on young, middle-aged or old trees.Generation length of the red-listed lichen Cliostomum corrugatum was examined using Bjärka-Säby as the study site. The results showed that the average age of an individual of C. corrugatum is 25–30 years at the onset of spore production.Generation length of the red-listed lichen Cliostomum corrugatum was examined using Bjärka-Säby as the study site. The results showed that the average age of an individual of C. corrugatum is 25–30 years at the onset of spore production.The rarity of C. corrugatum was also examined. DNA of an intron from 85 samples, collected at five sites in Östergötland, yielded 11 haplotypes. Results from the coalescent analysis, mantel test and AMOVA indicated that C. corrugatum have a high ability to disperse. The study concluded that its rarity is most likely connected with the low amount of available habitat, old Q. robur.The changes in the distribution of epiphytic lichens in southern Sweden between 1986 and 2003 were compared. For each year a centroid was calculated on all combinations of tree and lichen species. The three significant cases showed that the centroid movement pointed toward a north-east or north-north-east direction.Regional gradients of abundance and size of Hypogymnia physodes at 66 sites in southern Sweden were examined. The coordinate system rotating the reference system of investigated sites around the origin was used to search for the best explanatory power for the angle of the explanatory variables. The results showed a gradient of increase in the probability of occurrence in a north-north-east direction and an increase in diameter on thallus size in a west-north-west direction.
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| 3. |
- Rindzeviciute, Egle, 1978-
(författare)
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Constructing Soviet Cultural Policy : Cybernetics and Governance in Lithuania after World War II
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Efter första världskriget var Sovjetunionen en av de första moderna stater som uttryckligen ägnade sig åt att övervaka och styra kulturen, vilket tog sig formen av en formaliserad och institutionaliserad statlig kulturpolitik. I denna övervakningsoch styrningsprocess försåg vetenskap och teknologi staten med konceptuella och materiella resurser vilka användes för att definiera såväl själva processen som föremålet för den. Efter andra världskriget gav utvecklingen inom naturvetenskap och teknik upphov till en ny vetenskap som behandlade frågor kring kontroll och kommunikation, Norbert Wieners cybernetik, vilken fick en bred tillämpning inte enbart inom ingenjörsvetenskapen utan även i frågor som rörde förståelsen av människor, maskiner och samhällen. Denna avhandling undersöker hur cybernetiken påverkade utformningen av den sovjetiska kulturpolitiken. Fokus ligger särskilt på sovjetiska Litauen. Det huvudsakliga argumentet är att en särskilt inflytelserik diskurs rörande cybernetisk styrning och övervakning utformades i Sovjetunionen från 50-talet och framåt. Som ett resultat av en överföring från tekniska och vetenskapliga diskurser var denna diskurs användbar inte bara som ett verktyg för att tjäna staten utan kunde även användas av kulturella aktörer för att kritisera själva sovjetsystemet. Genom att analysera organisatoriska praktiker och officiella och samhälleliga diskurser avslöjar denna studie komplexiteten i förhållandet mellan styrning och övervakning, kultur och vetenskap och teknologi.
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| 4. |
- Osanami Törngren, Sayaka
(författare)
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Love ain't got no color? : Attitude toward interracial marriage in Sweden
- 2011
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This dissertation focuses on the geographical area of Malmö, the third largest city in Sweden, and examines the majority society’s opinions and attitudes toward interracial dating, marriage and childbearing. The dissertation is driven by two theoretical frames: the theory of race as ideas constructed through the perception of visible differences and the theory of prejudice and stereotypes. Mixed methods have been chosen as a means of exploring people’s attitudes toward interracial relationships. Quantitative data was collected by means of an attitude survey and the qualitative data was collected by means of follow-up interviews with some of the respondents who participated in the survey. The study shows that although their attitudes vary depending on the different groups in question, the majority of the respondents and interviewees could imagine getting involved in interrelationships and would not react negatively if a family member got involved in such a relationship. The quantitative results address the importance of intimate contacts, in other words having friends of diverse racial and ethnic backgrounds in having more positive attitudes toward interracial dating, marriage and childbearing. Age, gender, education and the place of upbringing also affects people’s attitudes. The qualitative inquiry probes the reasoning behind the survey results and points to the complicated relations between individual attitudes and the sense of group position. The interviewees’ words depict color-blind ways of talking about attitudes toward interracial marriage and different groups. Ideas of race emerge in this color-blind reasoning and the role of visible difference is highlighted both through the quantitative and qualitative inquiries.
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