Artikler, rapporter og annet (arktisk og marin biologi): Recent submissions
Now showing items 201-220 of 1535
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Life-cycle analysis of an endangered migratory goose to assess the impact ofconservation actions on population recovery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-29)Evaluating the effectiveness of conservation actions is challenging for migratory species because a population can be impacted anywhere along its route. Conservation actions for the critically endangered Fennoscandian lesser white-fronted goose population include culling of red foxes in the breeding area and habitat improvements and reduction of illegal hunting in the non-breeding areas. One goal ... -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2021
(Research report; Forskningsrapport, 2023-03-08)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede økningen i klimarelaterte skogskader gir store utfordringer for forvaltningen av framtidas skogressurser. Det samme gjør invaderende skadegjørere, både allerede etablerte arter ... -
Panel-based Assessment of Ecosystem Condition of Norwegian Barents Sea Shelf Ecosystems - Appendices
(Research report; Forskningsrapport, 2023-03-16) -
Panel-based Assessment of Ecosystem Condition of Norwegian Barents Sea Shelf Ecosystems
(Research report; Forskningsrapport, 2023-03-16)The System for Assessment of Ecological Condition, coordinated by the Norwegian Environment Agency, is intended to form the foundation for evidence-based assessments of the ecological condition of Norwegian terrestrial and marine ecosystems not covered by the EU Water Framework Directive. The reference condition is defined as “intact ecosystems”, i.e., a condition that is largely unimpacted by modern ... -
Waters that matter: How human-environment relations are changing in high-Arctic Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-20)There is scientific consensus that the archipelago of Svalbard is warming up faster than other parts of the planet. People who live in or regularly visit this part of the European high Arctic observe and experience these changes in a subjective and relational manner. This article illustrates how perceptions of environmental change are enmeshed with our ways of interacting with water(s) and dwelling ... -
Modelling the spatial shifts of functional groups in the Barents Sea using a climate-driven spatial food web model
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-28)We built a dynamic, spatial food web model for the Barents Sea, developed with Ecospace by including species’ habitat requirements and ecological interactions. The model was used to test the spatial shifts of different functional groups due to warming. We compared model-predicted and field-surveyed biomass of functional groups (FGs) spatial distributions in relatively cold and warm years. The ... -
Global patterns and drivers of ecosystem functioning in rivers and riparian zones
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-09)River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to conduct a global-scale field experiment in greater ... -
Chronological changes in soil biogeochemical properties of the glacier foreland of Midtre Lovénbreen, Svalbard, attributed to soil-forming factors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-21)Glacier forelands provide an excellent opportunity to investigate vegetation succession and soil development along the chronosequence; however, there are few studies on soil biogeochemical changes from environmental factors, aside from time. This study aimed to investigate soil development and biogeochemical changes in the glacier foreland of Midtre Lov ́enbreen, Svalbard, by considering various ... -
Feasibility of active handheld NDVI sensors for monitoring of lichen ground cover
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-04)Vegetation indices are corner stones in vegetation monitoring. However, previous field studies on lichens and NDVI have been based on passive sensors. Active handheld sensors, with their own light sources, enables high- precision monitoring under variable ambient conditions. We investigated the use of handheld sensor NDVI for monitoring pale lichen cover across three study sites from boreal heathlands ... -
Sub-arctic mosses and lichens show idiosyncratic responses to combinations of winter heatwaves, freezing and nitrogen deposition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-25)Arctic ecosystems are increasingly exposed to extreme climatic events throughout the year, which can affect species performance. Cryptogams (bryophytes and lichens) provide important ecosystem services in polar ecosystems but may be physiologically affected or killed by extreme events. Through field and laboratory manipulations, we compared physiological responses of seven dominant sub-Arctic ... -
Raising offspring increases ageing: Differences in senescence among three populations of a long-lived seabird, the Atlantic puffin
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-12)1. Actuarial senescence, the decline of survival with age, is well documented in the wild. Rates of senescence vary widely between taxa, to some extent also between sexes, with the fastest life histories showing the highest rates of senescence. Few studies have investigated differences in senescence among populations of the same species, although such variation is expected from population-level ... -
The Norwegian philosopher Peter Wessel Zapffe(1899-1990) and the Book of Job
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022)https://www.dknvs.no/publikasjoner/skrifter/ -
Recent evolution of ancient Arctic leech relatives: systematics of Acanthobdellida
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-16)Acanthobdellida gnaw into the sides of salmonid fishes in frigid Arctic lakes and rivers, latching on with fearsome facial hooks. Sister to leeches, they are an ancient lineage with two described species. Unfortunately, Acanthobdellida are rarely collected, leading to a paucity of literature despite their unique morphology. Populations range from Eurasia to Alaska (USA), but few specimens of ... -
Mantle source heterogeneity in a Neoproterozoic back-arc basin: Geochemical and thermodynamic modeling of the volcanic section of Wadi Ghadir ophiolite, Egypt
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-02)Wadi Ghadir ophiolite in the Egyptian Eastern Desert, which forms the northern part of the Nubian Shield, is considered as one of the best-preserved segments of the Neoproterozoic oceanic lithosphere on Earth. Primary melt calculations and thermodynamic modeling of new geochemical data for the Wadi Ghadir pillow lavas and dike complexes, integrated with comprehensive petrographic investigations, are ... -
Brucellosis seroprevalence in captive scimitar-horned oryx (Oryx dammah) in the United Arab Emirates and associated risk factors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-01)Background: The scimitar‐horned oryx (Oryx dammah) (SHO) is a large African antelope that became extinct in the wild just over two decades ago. Conservation of the species is of prime importance, but it might face pathogen stressors.<p> <p>Methods and principal findings: Brucella melitensis biovar 1 was previously confirmed in a high‐density captive population of SHO held in Abu‐Dhabi emirate. ... -
Forest canopy resists plant invasions: a case study of Chromolaena odorata in Sal (Shorea robusta) forests of Nepal
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-07)Invasive alien species are a major threat to global biodiversity due to the tremendous ecological and economic damage they cause in forestry, agriculture, wetlands, and pastoral resources. Understanding the spatial pattern of invasive alien species and disentangling the biophysical drivers of invasion at the forest stand level is essential for managing forest ecosystems and the wider landscape. ... -
Monitoring Algal Blooms with Complementary Sensors on Multiple Spatial and Temporal Scales
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-19)Climate change, and other human-induced impacts, are severely increasing the intensity and occurrences of algal blooms in coastal regions (IPCC, 2022). Ocean warming, marine heatwaves, and eutrophication promote suitable conditions for rapid phytoplankton growth and biomass accumulation. An increase in such primary producers provides food for marine organisms, and phytoplankton play an important ... -
Lead in the marine environment: concentrations and effects on invertebrates
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-17)Lead (Pb) is a non-essential metal naturally present in the environment and often complexed with other elements (e.g., copper, selenium, zinc). This metal has been used since ancient Egypt and its extraction has grown in the last centuries. It has been used until recently as a fuel additive and is currently used in the production of vehicle batteries, paint, and plumbing. Marine ecosystems are sinks ... -
Uniform bathymetric zonation of marine benthos on a Pan-Arctic scale
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-19)While numerous regional studies of bathymetric zonation of benthic fauna globally have been done, few large-scale analyses exist, and no ocean-scale studies have focused on the Arctic Ocean to date. In the present work we, hence, examined bathymetric zonation of macro- and megabenthos over a depth range spanning from the shelf to the abyssal plain (14 – 5416 m) and regionally extending from the Fram ... -
A review of open top chamber (OTC) performance across the ITEX Network
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-19)Open top chambers (OTCs) were adopted as the recommended warming mechanism by the International Tundra Experiment (ITEX) network in the early 1990’s. Since then, OTCs have been deployed across the globe. Hundreds of papers have reported the impacts of OTCs on the abiotic environment and the biota. Here we review the impacts of the OTC on the physical environment, with comments on the appropriateness ...