Blar i Institutt for natur, helse og miljø på tittel
Viser treff 264-283 av 312
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Soft resilience: moisture-dependent lichen elasticity buffer herbivore trampling in cold alpine-tundra ecosystems
(Peer reviewed; Journal article, 2020)Herbivores may have extensive top-down effects in open grazing ecosystems, generating vegetation changes by grazing and trampling. Trampling effects are understudied, but may be a major ecological factor. In cold alpine-Arctic ... -
Soil temperature variation in calciphile mountain plant communities in Southern Norway
(Journal article; Peer reviewed, 2012)Soil temperature dynamics are considered to be of great importance for alpine plant life. The aim of this study was to analyse differences in soil temperature parameters between and within exposed ridges, leesides, and ... -
Spatial and temporal trends of mercury in freshwater fish in Fennoscandia (1965-2015)
(NIVA-rapport;, Research report, 2017)Mercury (Hg) emissions to the atmosphere cause elevated Hg levels in fish, even in many remote regions of the world. Here we present an extensive database of more than 50 000 measurements of Hg in fish, including 2 775 ... -
Spatial and temporal variability in summer diet of gray wolves (Canis lupus) in the Greater Yellowstone Ecosystem
(Peer reviewed; Journal article, 2021)The role of predation by large carnivores in suppressing prey populations and structuring ecosystems is highly debated, calling for a detailed understanding of carnivore diets. Wolves (Canis lupus) roam across three ... -
Spatiotemporal and seasonal dynamics in the microbial communities of a landfill-leachate contaminated aquifer
(Peer reviewed; Journal article, 2021)The microbiome of an aquifer contaminated by landfill leachate and undergoing intrinsic remediation was characterised using 16S rRNA metabarcoding. The archaeal/bacterial V3–V4 hypervariable region of the 16S rRNA gene was ... -
A stochastic event-based approach for flood estimation in catchments with mixed rainfall and snowmelt flood regimes
(Peer reviewed; Journal article, 2019)The estimation of extreme floods is associated with high uncertainty, in part due to the limited length of streamflow records. Traditionally, statistical flood frequency analysis and an event-based model (PQRUT) using a ... -
Strutseving (Matteúccia struthiópteris (L.) Tod.) - en vanlig bregneart som kan bli en gourmetgrønnsak også i Norge. Litteraturoversikt
(Bioforsk TEMA;, Research report, 2007)Det finnes et landbruksprodukt som er sterkt etterspurt i deler av USA og Canada, men som synes å være nesten ukjent i Europa. Produktet har blitt beskrevet som ”en smakfull og næringsrik grønnsak”. Råvaretilgangen og ... -
Subspecies discrimination in the Scandinavian beaver (Castor fiber): combining behavioral and chemical evidence
(Journal article; Peer reviewed, 2004)Geographic isolation is one of several models that has been proposed to explain the evolutionary course of speciation. In this study, we examined how geographical isolation may affect subspecies discrimination in the ... -
Superoxide dismutase polymorphisms in wild populations of herb Paris (Paris quadrifolia L., Trilliaceae)
(Journal article, 2003)Polymorphism of superoxide dismutase (SOD) was investigated in leaves of herb Paris (Paris quadrifolia L., Trilliaceae). The plants were collected during the summer and autumn of 2001 from different natural locations in ... -
Survival Trends of Right- and Left-Sided Colon Cancer across Four Decades: A Norwegian Population-Based Study
(Peer reviewed; Journal article, 2021)Background: Patients with right-sided colon cancer (RCC) and left-sided colon cancer (LCC) differ clinically and molecularly. The main objective was to investigate stage-stratified survival and recurrence of RCC and LCC ... -
Temperature and Precipitation Development at Svalbard 1900-2100
(Journal article; Peer reviewed, 2011-12-06)Substantial variations in temperature and precipitation have been observed since the first permanent weather station was established in the Svalbard region in 1911. Temperature and precipitation development are analysed ... -
Temporal effects of hunting on foraging behavior of an apex predator: Do bears forego foraging when risk is high?
(Journal article; Peer reviewed, 2016)Avoiding predators most often entails a food cost. For the Scandinavian brown bear (Ursus arctos), the hunting season coincides with the period of hyperphagia. Hunting mortality risk is not uniformly distributed throughout ... -
Territoriality and group sizes in Eurasian beavers (Castor fiber): echoes of settlement and reproduction?
(Journal article; Peer reviewed, 2005)According to current theories of territoriality, an animal is expected to defend the smallest area that can provide resources for maximisation of reproduction, known as the lsquoeconomically defendablersquo area. In group ... -
Territoriality and time budgets in beavers during sequential settlement
(Journal article; Peer reviewed, 1994)Beavers (Castor fiber) were sequentially released into a previously unoccupied area. The settlement of the animals approximated an ideal despotic distribution: they successively settled in rich habitat and then in poor ... -
Territory ownership and familiarity status affect how much male root voles (Microtus oeconomus) invest in territory defence
(Journal article; Peer reviewed, 2008)Neighbour–stranger discrimination occurs when individuals respond with more aggression to strangers than to territorial neighbours—a phenomenon termed the “dear enemy phenomenon” (DEP). We investigated the DEP with male ... -
The beaver's reconquest of Eurasia: status, population development, and management of a conservation success
(Journal article; Peer reviewed, 2002)Overhunting reduced Eurasian Beaver (Castor fiber) populations to c. 1200 animals, in eight isolated populations, around the end of the 19th century. Protection, natural spread and reintroductions led to a powerful recovery ... -
The effects of wildfire on the water chemistry of dilute, acidic lakes in southern Norway
(Journal article; Peer reviewed, 2014-01-22)Changes in lake water chemistry were studied for >4 years following a large wildfire in a boreal forest area in Mykland, southern Norway, an area characterized by thin and patchy, base-poor and slow-weathering soils and ... -
The function of scent marking in beaver (Castor fiber) territorial defence
(Doctoral thesis; Peer reviewed, 2001)This thesis examines how scent marking in Eurasian beaver (Castor fiber) functions in territorial defence. Beavers usually deposit scent (castoreum and/or anal gland secretion (AGS)) onto small piles of mud and debris, and ... -
The growth and phenology patterns of herb Paris (Paris quadrifolia L., Trilliaceae): relation to soil and air temperatures
(Journal article; Peer reviewed, 2003)The phenology and development of Paris quadrifolia L. has been related to variations in soil and air temperatures during four seasons (1997-2000). Its emergence appeared to be strongly dependant on soil temperature. Plants ... -
The Hardangervidda wild reindeer herd: a problematic management history
(Journal article; Peer reviewed, 2014)The unique and internationally important wild reindeer Rangifer tarandus herd on the Hardangervidda plateau of southern Norway has shown frequent and extreme fluctuations in harvest numbers for the past 60 years, despite ...