Blar i Faculty of Environmental Sciences and Natural Resource Management (MINA) på utgivelsesdato
Viser treff 61-80 av 1600
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Mulige indirekte effekter av klimavariasjoner for smågnagere og hønsefugler : bestandsfluktuasjoner 1920–2010 vurdert i forhold til frøsetting og sommertemperatur
(MINA fagrapport;16, Report, 2011)Smågnagernes viktige økologiske rolle og hønsefuglenes betydning som jaktobjekt gjør at det er knyttet stor interesse til mulige klimaeffekter på de velkjente 3–4 års bestandssvingningene for disse dyregruppene. Det er ... -
Variability and uncertainty in soil physical properties : effects of data source on functional criteria
(PhD Thesis;2011:40, Doctoral thesis, 2011)Modeller har blitt uunngåelige verktøy for en lang rekke problemstillinger knyttet til landbruk og miljø. Samtidig er modellering forbundet med usikkerhet, noe som kan ha konsekvenser når beslutninger skal fattes. En av ... -
Angling tourism and landowner based management of Atlantic salmon stocks in the Trondheim fjord region of Norway
(PhD Thesis;2011:26, Doctoral thesis, 2011)Angling for Atlantic salmon (Salmo salar L.) is a popular recreational activity and provides income for Norwegian landowners holding fishing rights. Abundance and distribution of salmon have however declined markedly during ... -
Modeling organic matter decomposition and nitrogen dynamics in agricultural soils : Environmental impacts of plant production systems
(PhD Thesis;2011:69, Doctoral thesis, 2011)Agricultural plant production has negative environmental impacts such as nitrate leaching and emissions of greenhouse gasses (N2O and CO2). Both phenomena are affected by the decomposition of soil organic matter and plant ... -
Analyses of the use of the Norwegian forest sector in climate change mitigation
(PhD Thesis;2011:28, Doctoral thesis, 2011)The forest sector plays important roles in the global carbon cycle. Firstly, the global carbon cycle. Firstly, the global carbon storage in forest biomass and soil is of a considerable size, and the total carbon sequestration ... -
River restoration and habitat improvements in the sub-arctic river Bognelva – effects on anadromous fish
(Master thesis, 2011-02-17)Alterations of watercourses in the form of channelization, dam building and digging of dikes has been ongoing for centuries. This has eliminated much of the vital natural variation found in rivers that is necessary for ... -
Effects of the introduction of Lake Trout (Salvelinus Namaycush) on the Osprey (Pandion Haliaetus) population in Yellowstone National Park
(Master thesis, 2011-03-03)In recent years the number and reproduction of ospreys (Pandion haliaetus) nesting on Yellowstone Lake in Yellowstone National Park (YNP), USA, has been declining. The main hypothesis is that the decline in nesting ospreys ... -
Registrering av diameter i brysthøyde ved hjelp av data fra bakkemontert laserskanner
(Master thesis, 2011-04-14)Målet med denne oppgaven er å teste hvor godt en bakkemontert laserskanner (TLS) registrerer diameter i brysthøyde (dbh) i produksjonsskog. Seks sirkulære prøveflater i Aurskog-Høland kommune, hver på 1000 m2, ble totalklavet ... -
Do nitrogen-fixing legumes affect soil nutrient levels, plant growth or community properties of an alpine ecosystem?
(Master thesis, 2011-04-27)In this master thesis I examine how two N-fixing legume species, Astragalus alpinus L. and Oxytropis lapponica (Wahlenb.) Gay, affect different aspects of an alpine ecosystem in two sites situated along a gradient in ... -
Individually characteristic corncrake Crex crex song reveals long-distance movements within the breeding season
(Master thesis, 2011-04-28)Due to modern agricultural practices, the corncrake is a species of global conservation concern. Mowing of meadows may cause corncrakes to make movements within one breeding season, but such movements are in general poorly ... -
Ecolocical effects of acute oil spills
(Master thesis, 2011-04-28)The coastal ecosystems are under constant pressure from natural and anthropogenic sources. The interactions between organisms and their environment is a complex myriad of changes and responses making impacts from acute ... -
Partitioning of prey for nestlings by female Eurasian kestrels (Falco tinnunculus). Effect of prey type, prey size and brood size.
(Master thesis, 2011-04-28)I used the video recordings from 19 nests of the Eurasian kestrel (Falco tinnunculus) located in south-eastern Norway to investigate allocation of food from parents to nestlings. Prey was both avian and mammalian. The mass ... -
Ørret- (Salmo trutta) og laksunger (Salmo salar) i tre Vestlandselver før og etter bygging av små kraftverk
(Master thesis, 2011-05-02)Utbygging av små kraftverk som kilde til fornybar energi er et politisk satsingsområde i Norge. Miljøeffekter av store vannkraftutbygginger er relativt godt dokumentert, men kunnskap om miljøeffekter av små kraftverk er ... -
Annual variation in the diet of the European shag (Phalacrocorax aristotelis) at Sklinna, central Norway, and a possible relationship between reproduction and abundance of year class 1-saithe in the diet
(Master thesis, 2011-05-09)Monitoring of seabirds is an important task due to large current environmental and ecosystem changes which have affected many species of seabirds severely through affecting their food supplies. Declines in food supplies ... -
Rødrevens (Vulpes vulpes) vinterdiett: en sammenlikning mellom skog- og landbruksdominert landskap i sørøst Norge
(Master thesis, 2011-07-22)Rødreven (Vulpes vulpes) er en generalist, der dietten varierer med det som er tilgjengelig i de ulike leveområdene og med årstidene. Vinteren er en periode da reven er under hardt press på grunn av økt energibehov og ... -
The influence of reindeer grazing and trampling on newly seeded fields in Finnmark, Norway
(Master thesis, 2011-09-09)In recent years, conflicts between reindeer herdsmen and resident farmers have increased in Finnmark, northern Norway. The causes of these conflicts vary, but one of the major causes is reindeer grazing and trampling on ... -
Effects of fire history on species richness and carbon stocks in a Peruvian puna grassland, and development of allometric equations for biomass estimation of common puna species
(Master thesis, 2011-09-09)High-elevation ecosystems have recently received increasing attention from the carbon financing sector. This has sparked the need for reliable and non-destructive methods to estimate carbon stocks in these ecosystems. The ... -
The relationships between forest structure and red squirrel midden density in Mud Lake study area, Cooke City Basin, Montana.
(Master thesis, 2011-09-09)Whitebark pine (Pinus albicaulis) seeds are a very important food source for grizzly bears (Ursus arctos horribilis) and other species in the Greater Yellowstone Ecosystem. Whitebark pine is a long-lived stone pine of ... -
Scale- and growth analysis of Atlantic salmon (salmo salar) caught with a bag net near the River Mandalselva, on the Skagerrak coast
(Master thesis, 2011-10-03)The abundance of wild Atlantic salmon (Salmo salar) has declined since the 1970s. The major reason for the recent decline appears to be increased marine mortality. Before 1970s, the native populations of Atlantic salmon ... -
Intraspecific sperm length variation and two secondary sexual characters in the pied flycatcher (Ficedula hypoleuca)
(Master thesis, 2011-10-03)Spermatozoa are amongst the most variable of all animal cells, varying enormously in size and shape both between and within different species. While interspecific variation in sperm traits over the last decades has been ...