Browsing Doctoral Theses / Doktorsavhandlingar Institutionen för biologi och miljövetenskap by Issue Date
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Assessment of dietary patterns and prey consumption of marine mammals: Grey seals (Halichoerus grypus) in the Baltic Sea
(2012-02-09)The Baltic Sea has been severely affected by pollution and resource overexploitation during the last centuries. The grey seal (Halichoerus grypus) is a good example of how a species can be affected by such changes. In the ... -
The Effects of Temperature on Gut Blood Flow and Gut Motility in Fish
(2012-03-09)In order for a fish to grow and thrive, the gut must function efficiently. This is achieved through a range of processes, including controlled patterns of gut motility and modifications in gut blood flow. How these processes ... -
Carbon Dioxide and Water Vapour Exchange within a Norway Spruce Canopy
(2012-05-04)Terrestrial ecosystems can act both as sinks and sources in the global carbon cycle. Forests are an important part of this system and a good understanding of their carbon balance is essential for assessments of the future ... -
Phylogenetic Inference and Allopolyploid Speciation - A Study of Silene section Physolychnis
(2012-08-31)The major theme of this thesis is allopolyploidization, with focus on Silene section Physolychnis. The evolutionary history of an allopolyploid species can be established by inferring the sister relationships of the ... -
Plant Species Composition and Diversity in Cliff and Mountain Ecosystems
(2012-09-12)Ecosystems today are under increasing pressure from a rapidly changing climate, changes in land-use, habitat fragmentation and degradation and increasing anthropogenic disturbance. Studying drivers of biodiversity patterns ... -
Grazer-induced responses in marine phytoplankton
(2012-09-27)Phytoplankton are the most important primary producers in the world’s oceans, yet little is known of how they avoid the constant threats from the pelagic grazers. From land it is well known that plants defend themselves ... -
Detoxification Mechanisms in Fish - Regulation and function of biotransformation and efflux in fish exposed to pharmaceuticals and other pollutants
(2012-10-26)It is likely that fish in their natural environment are exposed to mixtures of several pharmaceuticals as well as other pollutants. This may result in adverse effects which are augmented due to the chemical interactions. ... -
Paternal care and brood reduction in a pipefish
(2012-11-01)From an evolutionary and adaptive perspective, the occurrence and extent of parental care in animals (investment in offspring beyond the genetic contribution) is expected to depend on an optimal (fitness-maximizing) balance ... -
Gene expression and regeneration in ophiuroids: A study of transcriptional activity and regeneration in the temperate Amphiura filiformis and Antarctic Ophionotus victoriae
(2012-11-01)Regeneration, in which lost or damaged tissues are re-grown, is a common phenomenon amongst animals and especially so within the ophiuroids (brittle stars) of the phylum echinodermata. The process of regeneration begins ... -
Seaweed Invasions and Novel Chemical Defences
(2012-11-08)Biological invasions pose a risk to the biodiversity and the functioning of ecosystems in invaded areas. The reasons why some introduced species become dominant and widespread in their new environments is still largely an ... -
Ecological aspects of marine Vibrio bacteria - Exploring relationships to other organisms and a changing environment
(2013-02-04)Heterotrophic bacteria of the genus Vibrio are indigenous in the marine environment although environmental cues regulate their growth and distribution. The attention brought to this genus is due to its many species/strains ... -
Scale-worm Systematics (Annelida, Polychaeta)
(2013-02-07)Paper I. Scale-worms are segmented worms. They can be found in all marine benthic habitats, including about 1200 species and over 200 genera. There has been little known about the phylogeny of this group and this study is ... -
Vesicle Transport with Emphasis on Chloroplasts
(2013-02-14)The plants on which we depend for food and oxygen need photosynthesis to prepare their own food. Photosynthesis takes place in the chloroplast. Inside chloroplasts is a specialized membrane called the thylakoids in which ... -
Responses of shallow sediment ecosystems to environmental alterations
(2013-02-14)Shallow-water sediment systems are continuously exposed to a range of anthropogenic stressors, including increased nutrient loading, physical disturbance and toxicants. Superimposed on these local stressors are stressors ... -
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia)
(2013-02-21)The cold-water coral Lophelia pertusa is the most important reef-building coral species in the NE Atlantic Ocean. The reef framework creates a complex structural habitat that sustains high species diversity in the deep-sea. ... -
Herbivory and biodiversity conservation of the savannah habitats in Akagera National Park, Rwanda
(2013-04-05)Savannahs make up about 20% of the world’s land surface, whereas African savannahs constitute 50% of the land area and have been used as parks to conserve nature and for outdoor recreation. However, conserving biodiversity ... -
Evolution of the brown algae Fucus radicans and F. vesiculosus in the Baltic Sea
(2013-04-25)The aim of my thesis was to investigate neutral and adaptive evolution of a lineage of macroalga (Fucus vesiculosus) that entered the Baltic Sea about 6000 years ago, and later gave rise to a new endemic species, F. radicans. ... -
Mutagenesis and transcriptome mapping in oat and characterization of high β-glucan lines
(2013-04-25)Oat (Avena sativa) is a hexaploid crop that is cultivated in Europe, North America, Russia, Australia and northern China. During recent years, oat has seen increased interest due to its potential as a functional food crop. ... -
Confusions in Fungal Systematics
(2013-05-03)The focus of this thesis has been on fungi with corticioid, polyporoid or stipitate stereoid sporocarps in the Agaricomycetes, but included are also two papers which are methodologically oriented. The family Podoscyphaceae, ... -
Mate choice and its evolutionary consequences in intertidal snails (Littorina spp.)
(2013-05-06)The ability to recognise potential mates and choose the best possible partner for reproduction is of fundamental importance for most animal species. This thesis presents studies of mate choice in marine snails of the genus ...