Blar i Institutt for biologi på tittel
Viser treff 1346-1365 av 2516
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Levels of emerging and traditional organic Pollutants in Northern Goshawk (Accipiter gentilis) from Trøndelag. Potential Effects on oxidative Stress.
(Master thesis, 2016)Due to the implemented restrictions and bans of many persistent organic pollutants (POPs), the production and use of alternative chemicals are increasing. The lack of knowledge regarding the environmental occurrence, ... -
Levels of Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) in Feathers of Eurasian Eagle-Owls (Bubo bubo) in Norway
(Master thesis, 2017)In the current study per- and polyfluroalkyl substances (PFASs) were investigated in 72 feathers from Eurasian Eagle-Owls (Bubo bubo) collected in four geographically similar areas in Norway and in six different years. The ... -
Levels of Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) in Northern Goshawk (Accipiter gentilis) nestlings from Norway and Spain and potential effect on innate immune system signalling pathways
(Master thesis, 2018)Per- and polyfluoroalkyl substances (PFASs) are environmentally persistent and bioaccumulative chemicals, which reach high levels in apex predators like birds of prey. Immunomodulation is among the most concerning toxic ... -
Levels, patterns, and biomagnification potential of perfluoroalkyl substances in a terrestrial food chain in a Nordic Skiing Area
(Journal article; Peer reviewed, 2019)Perfluoroalkyl substances (PFASs) are used in a wide range of consumer products, including ski products, such as ski waxes. However, there is limited knowledge on the release of PFASs from such products into the environment ... -
Lichens facilitate seedling recruitment in alpine heath
(Peer reviewed; Journal article, 2019)Questions How do mat thickness, physical structure and allelopathic properties of terricolous mat‐forming lichens affect recruitment of vascular plants in dwarf‐shrub and lichen heath vegetation? Location The mountains of ... -
Life and Light at the Dead of Night
(Chapter, 2020)The Polar Nigth as a unique beauty. The aurora borealis, the moonlight, the faint glow of the sun behind white mountains, and, not the least, the mysteries of the living creatures that we have found in the Polar Night – ... -
Life history characteristics and genetic variation in an expanding species, Pogonatum dentatum.
(Doctoral thesis, 2003)The main objective of this thesis is to get a better understanding of the processes behind species range expansions and the consequences for variation in life history characters and genetic variation. The thesis focuses ... -
Life history consequences of environmental variation along ecological gradients in northern ungulates
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:15, Doctoral thesis, 2006)Temporal and spatial variation in the environment can influence the performance of individuals in wild ungulate populations. Of particular importance is an understanding of the mechanisms that shape variation in individual ... -
LIFE HISTORY DYNAMICS OF THE SCYPHOZOAN JELLYFISH AURELIA SPP.: A COMBINED META-ANALYSIS AND MODELLING APPROACH
(Master thesis, 2020)One of the most common jellyfish genera are the cnidarian scyphozoans Aurelia spp. They are spread across most of our oceans and seas, have a complex life cycle and are a bloom forming species. Jellyfish blooms are perceived ... -
Life history traits and demography of a mountain bird under climatic variation
(Doctoral theses at NTNU;2024:90, Doctoral thesis, 2024)Ongoing climate change can be expected to have major consequences for many species and ecosystems. Effects have been reported on reproduction, survival and movement ecology, with potential impacts for population dynamics ... -
Life-history Effects of Metal contamination in Arctic snow buntings (Plectrophenax nivalis) breeding in Adventdalen, Svalbard.
(Master thesis, 2016)The present study was the first to investigate element concentrations in feathers of both nestling and adult snow buntings in the Arctic environment of Adventdalen. Significant differences in concentrations between nestling- ... -
Life-history evolution under fluctuating density-dependent selection and the adaptive alignment of pace-of-life syndromes
(Journal article; Peer reviewed, 2018)We present a novel perspective on life-history evolution that combines recent theoretical advances in fluctuating density-dependent selection with the notion of pace-of-life syndromes (POLSs) in behavioural ecology. These ... -
Life-history variation and stochastic population dynamics in vertebrates
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:177, Doctoral thesis, 2014)Temporal fluctuations in populations are influenced by a large number of factors, including density effects, dispersal, interspecific interactions, and a number of environmental variables. Within populations, individuals ... -
Light and Temperature Effects on Metabolite Concentration in Selected Herbs and Microgreens
(Master thesis, 2017)Increasing evidence from epidemiological studies has shown that vegetable consumption is an important determinant of health. These health benefits are attributed to the presence of phytochemicals in these vegetables or ... -
Light in the dark – the role of irradiance in the high Arctic marine ecosystem during polar night
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:151, Doctoral thesis, 2013)In this thesis, I studied the role of light in the Arctic marine ecosystem during the polar night; a time of year when it appears completely dark to the human eye. I have studied patterns of diel vertical migration (DVM) ... -
Light in the Polar Night
(Chapter, 2020)How much light isa vailable for biological processes during Polar Night? This question appears simple enough. But the reality is that conventional light sen- sors for measuring visible light (~350 to ~700 nm) have not been ... -
Light regulation of LHCX genes in the benthic diatom Seminavis robusta
(Peer reviewed; Journal article, 2020)Intertidal benthic diatoms experience a highly variable light regime, which especially challenges these organisms to cope with excess light energy during low tide. Non-photochemical quenching of chlorophyll fluorescence ... -
Light response and acclimation of microalgae in a changing Arctic
(Doctoral theses at NTNU;2018:270, Doctoral thesis, 2018)Summary of thesis: This thesis investigates ice-associated and under-ice algal communities, and the controlling role of light in the Arctic pack ice region. Changes in the light regime are a consequence of the substantial ... -
Light responses in the marine diatom Phaeodactylum tricornutum
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:378, Doctoral thesis, 2013)Marine diatoms fix more CO2 than all rainforest and have a fundamental role for production in the oceans and global climate. Almost all life on Earth somehow depends on photosynthesis fuelled by light energy from the sun. ... -
Limited decadal growth of mountain birch saplings has minor impact on surrounding tundra vegetation
(Peer reviewed; Journal article, 2022)Temperatures over the Arctic region are increasing at three times the rate of the global average. Consequently, Arctic vegetation is changing and trees are encroaching into the tundra. In this study, we examine the ...