Blar i Institutt for biologi på tittel
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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 ... -
Linking variation in personality and behavioural syndromes to social foraging and producer-scrounger effects in house sparrows (Passer domesticus)
(Master thesis, 2016)Consistent behavioural differences between individuals across time and situations are referred to as animal personality. Associated with this are behavioural syndromes , which are suites of correlated behaviours across ... -
Lion and spotted hyena distributions within a buffer area of the Serengeti-Mara ecosystem
(Peer reviewed; Journal article, 2021)Most large carnivore populations are declining due to anthropogenic activities including direct persecution, prey depletion, habitat loss and degradation. protected areas (PAs) can help maintain viable large carnivore ... -
Lipid and Astaxanthin Contents and Biochemical Post-Harvest Stability in Calanus finmarchicus
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:148, Doctoral thesis, 2012) -
Lipid Composition in Antarctic krill, Euphausia superba
(Master thesis, 2011)Small variations in the lipid composition was found in Antarctic krill ranging from 3.0-5.5 cm. No differences were founf in lipid composition between malea and female Antarctic krill. There were some differences in lipid ... -
Lipid metabolism and diapause timing in Calanus copepods: The impact of predation risk, food availability and oil exposure
(Doctoral theses at NTNU;2021:355, Doctoral thesis, 2021)Calanoid copepods of the Calanus genus have an important ecological role as energetic links between primary producers and higher trophic level species in the North Atlantic and Arctic Oceans. Most individuals spend a large ... -
Lipid metabolism in Calanus finmarchicus is sensitive to variations in predation risk and food availability
(Peer reviewed; Journal article, 2020)Late developmental stages of the marine copepods in the genus Calanus can spend extended periods in a dormant stage (diapause) that is preceded by the accumulation of large lipid stores. We assessed how lipid metabolism ...