Sökning: "Lichen"
Visar resultat 11 - 15 av 69 avhandlingar innehållade ordet Lichen.
11. Distribution Patterns and Metapopulation Dynamics of Epiphytic Mosses and Lichens
Sammanfattning : This thesis examines the relative importance of local conditions, dispersal and dynamics of the trees on epiphyte distribution patterns and colonization-extinction dynamics. Study species are the mosses Orthotrichum speciosum and O. obtusifolium, and the red-listed Neckera pennata. LÄS MER
12. Plants go with the flow : predicting spatial distribution of plant species in the boreal forest
Sammanfattning : The main objectives of this thesis are to study if a topographic wetness index (TWI) could be used as a tool for predicting the spatial distribution of vascular plant species richness in the boreal forest as well as to study congruence in species richness between vascular plants, liverworts, mosses and lichens. A wetness index ln(a/tanβ) based on topography was used to assign a specific TWI-value to every 20 x 20m grid in two 25 km2 boreal forest landscapes (differing in average soil pH) in northern Sweden. LÄS MER
13. Diagnostic aspects of skin cancer and lichen sclerosus studied with laser scanning microscopy
Sammanfattning : Histopathologic examination of tissue biopsies is the current gold standard for the diagnosis of dermatological problems. Similarly, in oncology, sentinel lymph node (SLN) biopsy is the state-of-the-art diagnostic method for me- tastasis screening. LÄS MER
14. Oral contact allergy to carvone : with a focus on oral lichen
Sammanfattning : Avhandlingen undersöker karvon (l-karvon), ett mintsmakandearomämne, och hur kontaktallergi mot karvon yttrar sig. Karvonfinns framför allt i grönmynta/spearmint, men aromämnet kan ävenframställas ur limonen, ett citrondoftande parfymämne. LÄS MER
15. Epiphytic lichen responses to nitrogen deposition
Sammanfattning : Nitrogen (N) deposition has increased globally over the last 150 years and further increase is predicted for the future. Nitrogen is an important nutrient for lichens, involved in many processes in both photobiont and mycobiont. However, N can be a stressor, causing many lichens and lichen communities to disappear with increased deposition. LÄS MER