Blar i Master i natur-, helse- og miljøvern på tittel
Viser treff 158-177 av 207
-
Sand temperatures at sea turtle nesting beaches at the Pacific coast of Guatemala
(Master thesis, 2020)The climate is changing, bringing extremities such as increased periods of rainfall, but also draughts and warming temperatures. There are several species with presumed little capacity to adapt to climate changes, such as ... -
Seasonal and spatial variation in the macroparasite fauna of Arctic charr (Salvelinus alpinus L.) in Lake Norsjø, South-Eastern Norway
(Master thesis, 2019)Within freshwater systems, several factors contribute to aggregated distributions of parasites in fish. Niche segregation, individual feeding preferences, sex of the host, and water temperature are all examples of such ... -
Seasonal variations in the use of profundal habitat among freshwater fishes in Lake Norsjø, southern Norway, and subsequent effects on fish mercury concentrations.
(Master thesis, 2016-01-18)This study is based on monthly sampling of fish from an industrial water intake, located at the bottom of Lake Norsjø, at a depth of 50 m, during one year (2014). By this sampling strategy, we have obtained unique information ... -
Selection of aquatic vegetation in river habitats by Eurasian beaver (Castor fiber) in South-Eastern Norway
(Master thesis, 2020)Habitat selection in animals is evident when the choosing of habitat is disproportionate to its availability, usually when habitat characteristics differ in quantity and quality. A very important factor of their use is the ... -
Selection of rubbing trees by brown bears in Slovakia
(Master thesis, 2018)Chemical communication in bears is not fully understood, despite the importance of this topic for the behavioral ecology as well as for the conservation and management of Ursids. Brown bears often mark trees by rubbing on ... -
Short-term effects of bio-logging on body mass and growth of a semi-aquatic mammal, the Eurasian beaver (Castor fiber)
(Master thesis, 2020)Bio-logging is a popular method to collect scientific data in the field of animal ecology. The presumption is that bio-logging should allow the study of animals with only minor disturbance to their natural behaviour and ... -
Skred og erosjon i marine avsetninger - eksempler fra Byneset og Overhalla i Trøndelag
(Master thesis, 2016-04-21)Kvikkleireskred er en av de hyppigste naturkatastrofene som forekommer i Norge. Før i tiden trodde folk at det lå lommer med helt flytende leire i undergrunnen, som plutselig kunne renne ut. I dag vet vi at kvikkleire ... -
Subsurface mapping of Revdalen
(Master thesis, 2016-01-18)In Revdalen in Bø county there has been a lot of research of the possible contamination of the ground water, and the ground water wells which are used by the households in the area. The contamination is connected to the ... -
Subsurface mapping of Øverbømoen and locating optimal aquifers for drinking water supply. A hydrogeological survey using geophysical methods
(Master thesis, 2017)Denne masteroppgaven undersøkte potensielle akviferer i forhold til drikkevannforsyning ved Øverbømoen i Bø kommune. Øverbømoen er del av en glasifluvial delta-avsetning, hvilket anses å være en god kilde til grunnvann. ... -
Summer season soil temperature conditions, and soil moisture properties on the extensive green roofs in Oslo, Norway
(Master thesis, 2017)Nowadays, green roofs have been investigated more and more in order to improve the quality of municipal environment particularly to reduce the urban heat island effect and storm water runoff. Soil temperature and soil ... -
The surface albedo of three lichen species (Flavocetraria nivalis, Cladonia stellaris, Cetraria islandica) and crowberry (Empetrum nigrum), and the influence of zenith angle, clouds and aspect
(Master thesis, 2020)The surface albedo of vegetated surfaces can influence the climate through the fraction of the solar radiation that is reflected back to the atmosphere. In this study, I have measured the surface albedo of three lichen ... -
Termotolerante campylobacter i vann, fjørfe og gris : forekomst, identifisering, genetisk diversitet
(Master thesis, 2008)SAMMENDRAG: Termotolerante Campylobacter er en viktig næringsmiddelbåren patogen bakterie og regnes i dag blant de viktigste årsakene til bakterielt betinget diaré hos mennesker verden over. Bakterien er vanlig i tarmen ... -
The effect of human disturbance on nest predation rate of ground-nesting birds
(Master thesis, 2016-01-18)A number of studies have shown that human disturbance can have a strong negative impact on the successful reproduction in birds. Ground-nesting birds are especially vulnerable to nest mortality due to trampling of nests, ... -
The Effects of Human Influence on the Polypore Communities of Four Separate Spruce Forests in Telemark, Norway
(Master thesis, 2023)Polypores are wood-decaying fungi which are important for forest ecosystems in the nutrient cycling of dead wood and microhabitat creation. Continuity and quality in deadwood have been found to be important aspects for ... -
The impact of moisture on the albedo of lichens
(Master thesis, 2021)Lichens cover about 8% of the Earth’s land surface. They are an important forage for reindeer, but they also have an impact on the microclimate of their surroundings. Lichens have a relatively high albedo, giving them a ... -
The importance of microhabitat for the benthic algae of a Norwegian oligotrophic river : implications for diversity, biomass and ecological indices
(Master thesis, 2017)Relationships between soft-bodied benthic algae and their habitat have traditionally been studied among different waterbodies, but less attention has been paid to the effects of combined microenvironmental conditions within ... -
The importance of vegetation availability in three scales on body condition, reproduction and territory size of the Eurasian beaver
(Master thesis, 2019)Availability of food resources can affect body condition and reproduction in animal populations as low food availability can lead to decreasing body condition and constrain reproduction. At the same time, spatial distribution ... -
The relationship between enhanced Phormidium growth and fine sediment deposition in New Zealand Rivers : An experiment executed in collaboration with the Cawthron Institute in Nelson, New Zealand
(Master thesis, 2017)The proliferation of cyanobacteria dominated mats have been reported to be increasing in New Zealand rivers over the last decade. Phormidium is one of the genera dominating benthic mats in New Zealand rivers and have the ... -
The reliability of Citizen-science data collection - analysis of Natur i Endring project
(Master thesis, 2019)In this study we evaluate Natur i Endring citizen science project after the first season of running (2018). Natur i Endring is a project focused on crowd-sourcing data collection of naturally occurring treeline and forest ... -
Toxicity of the dental monomer BisGMA using cultured THP-1 cells as a model system.
(Master thesis, 2015)Bisophenol A-diglycidylmethacrylate (BisGMA) is the most frequently used monomer in polymer-based dental composites. Studies have shown that leaching from these materials can occur, and both dental personnel and patients ...