Artikler, rapporter og annet (arktisk og marin biologi): Nye registreringer
Viser treff 61-80 av 1522
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Movement diversity and partial sympatry of coastal and Northeast Arctic cod ecotypes at high latitudes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-24)Movement diversity within species represent an important but often neglected, component of biodiversity that affects ecological and genetic interactions, as well as the productivity of exploited systems. By combining individual tracking data from acoustic telemetry with novel genetic analyses, we describe the movement diversity of two Atlantic cod Gadus morhua ecotypes in two high-latitude fjord ... -
Large-scale seabird community structure along oceanographic gradients in the Scotia Sea and northern Antarctic Peninsula
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-18)Introduction: The Scotia Sea and Antarctic Peninsula are warming rapidly and changes in species distribution are expected. In predicting habitat shifts and considering appropriate management strategies for marine predators, a community-level understanding of how these predators are distributed is desirable. Acquiring such data, particularly in remote areas, is often problematic given the cost ... -
Long-term responses of Icelandic Arctic foxes to changes in marine and terrestrial ecosystems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-04)The long-term dynamics of predator populations may be driven by fluctuations in resource availability and reflect ecosystem changes such as those induced by climate change. The Icelandic Arctic fox (Vulpes lagopus) population has known major fluctuations in size since the 1950s. Using stable isotopes analysis of bone collagen over a long-time series (1979– 2018), we aimed at identifying the main ... -
Acclimation of circadian rhythms in woodland strawberries (Fragaria vesca L.) to Arctic and mid-latitude photoperiods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-10)Background Though many abiotic factors are constantly changing, the photoperiod is a predictable factor that enables plants to time many physiological responses. This timing is regulated by the circadian clock, yet little is known about how the clock adapts to the differences in photoperiod between mid-latitudes and high latitudes. The primary objective of this study was to compare how clock gene ... -
The application of unmanned aerial vehicle (UAV) surveys and GIS to the analysis and monitoring of recreational trail conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-04)Recreational trails are a vital element of protected natural areas (PNAs) infrastructure, which enables visitors to travel through and engage in various activities such as hiking, biking, horse riding. Degradation of trails adversely affects the natural environment as well as the safety and comfort of visitors. As the role of many PNAs is to protect the natural environment and to provide recreational ... -
Small rodent population cycles and plants – after 70 years, where do we go?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-12)Small rodent population cycles characterise northern ecosystems, and the cause of these cycles has been a long-lasting central topic in ecology, with trophic interactions currently considered the most plausible cause. While some researchers have rejected plant–herbivore interactions as a cause of rodent cycles, others have continued to research their potential roles. Here, we present an overview ... -
Interactive effects of ocean acidification and temperature on oxygen uptake rates in Calanus hyperboreus nauplii
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-26)The Arctic region is undergoing rapid and significant changes, characterized by high rates of acidification and warming. These transformations prompt critical questions about the resilience of marine communities in the face of environmental change. In the Arctic, marine zooplankton and in particular calanoid copepods play a vital role in the food web. Changes in environmental conditions could ... -
Evaluation of meso- and microplastic ingestion by the northern fulmar through a non-lethal sampling method
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-11)An increasing number of organisms from the polar regions are reported contaminated by plastic. Rarely a nonkilling sampling method is used. In this study we wanted to assess plastic levels using stomach flushing and evaluate the method suitability for further research and monitoring. The stomach of 22 fulmars from Bjørnøya, Svalbard, were flushed with water in the field. On return to the laboratory, ... -
Copepods’ true colors: astaxanthin pigmentation as an indicator of fitness
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-08)Pigmentation is often overlooked in zooplankton, since these organisms are mostly colorless to fit the translucid water medium. However, one of the dominant zooplankton taxa in aquatic ecosystems—copepods—often show a bright red-orange or blue coloration owing to the accumulation of carotenoid pigments in some parts of their bodies. Even though there are many functional traits describing copepod’s ... -
Patterns and repeatability of multi-ecotype assemblages of sympatric salmonids
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-04)Aim: High repeatability among assemblages of closely related but ecologically distinct ecotypes implies predictability in evolution and assembly of communities. The conditions under which ecotype assemblages form predictably, and the reasons, have been little investigated. Here, we test whether repeatability declines as the number of ecotypes builds.<p> <p>Location: Postglacial lakes with a ... -
Water column distribution of zooplanktonic size classes derived from in-situ plankton profilers: Potential use to contextualize contaminant loads in plankton
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-29)Pollution is one of the main anthropogenic threats to marine ecosystems. Studies analysing the accumulation and transfer of contaminants in planktonic food webs tend to rely on samples collected in discrete water bodies. Here, we assessed the representativeness of measurements at the chlorophyll-a maximum layer during the MERITEHIPPOCAMPE cruise for the entire water column by investigating the ... -
Long-term monitoring of exposure to toxic and essential metals and metalloids in the tawny owl (Strix aluco): Temporal trends and influence of spatial patterns
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-10)As a result of regulatory decisions, atmospheric deposition of most toxic metals and metalloids (MEs) has decreased in Europe over the past few decades. However, little is known about how this reduction translates into exposure at higher trophic levels in the terrestrial environment where temporal trends may be spatially heterogeneous due to local current or legacy sources of emissions (e.g., industry) ... -
Ingestion of car tire crumb rubber and uptake of associated chemicals by lumpfish (Cyclopterus lumpus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-12)Car tire rubber constitutes one of the largest fractions of microplastics emissions to the environment. The two main emission sources are tire wear particles (TWPs) formed through abrasion during driving and runoff of crumb rubber (CR) granulate produced from end-of-life tires that is used as infill on artificial sports fields. Both tire wear particles and crumb rubber contain a complex mixture ... -
Deep ocean particle flux in the Northeast Atlantic over the past 30 years: carbon sequestration is controlled by ecosystem structure in the upper ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-16)The time series of downward particle flux at 3000 m at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) in the Northeast Atlantic is presented for the period 1989 to 2018. This flux can be considered to be sequestered for more than 100 years. Measured levels of organic carbon sequestration (average 1.88 gm<sup>−2</sup> y<sup>−1</sup> ) are higher on average at this location than at ... -
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-29)The Barents Sea is undergoing rapid ocean warming with less sea ice and increased Atlantic inflow, shifting the pelagic ecosystem towards a more boreal one, a process referred to as Atlantification. While such changes have already been documented in the southern and central Barents Sea, less is known about the degree of Atlantification in the northern Barents Sea and Arctic Ocean. In this seasonal ... -
Assessment of risk and risk-reducing measures related to the introduction and dispersal of the invasive alien carpet tunicate Didemnum vexillum in Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-17)Didemnum vexillum is colonial sea squirt, a marine species which originates from the northwest Pacific; it was first recorded in Norway in November 2020. Didemnum vexillum is an alien species, meaning that it is a species that has been transferred from its original region to other regions of the world through human activity, and it had not previously been recorded in Norwegian waters. The species ... -
The northernmost hyperspectral FLoX sensor dataset for monitoring of high-Arctic tundra vegetation phenology and Sun-Induced Fluorescence (SIF)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-16)A hyperspectral field sensor (FloX) was installed in Adventdalen (Svalbard, Norway) in 2019 as part of the Svalbard Integrated Arctic Earth Observing System (SIOS) for monitoring vegetation phenology and Sun-Induced Chlorophyll Fluorescence (SIF) of high-Arctic tundra. This northernmost hyperspectral sensor is located within the footprint of a tower for long-term eddy covariance flux measurements ... -
Ambient Temperature Effects on the Spring and Autumn Somatic Growth Trajectory Show Plasticity in the Photoneuroendocrine Response Pathway in the Tundra Vole
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-11)Seasonal mammals register photoperiodic changes through the photoneuroendocrine system enabling them to time seasonal changes in growth, metabolism, and reproduction. To a varying extent, proximate environmental factors like ambient temperature (Ta) modulate timing of seasonal changes in physiology, conferring adaptive flexibility. While the molecular photoneuroendocrine pathway governing the seasonal ... -
Don't mind if I do: Arctic humpback whales respond to winter foraging opportunities before migration
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-06)Migration patterns are fundamentally linked to the spatiotemporal distributions of prey. How migrating animals can respond to changes in their prey’s distribution and abundance remains largely unclear. During the last decade, humpback whales (Megaptera novaeangliae) used specific winter foraging sites in fjords of northern Norway, outside of their main summer foraging season, to feed on herring ... -
Seasonal patterns of vertical flux in the northwestern Barents Sea under Atlantic Water influence and sea-ice decline
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-27)The northern Barents Sea is a productive Arctic inflow shelf with a seasonal ice cover and as such, a location with an efficient downward export of particulate organic matter through the biological carbon pump. The region is under strong influence of Atlantification and sea-ice decline, resulting in a longer open water and summer period. In order to understand how these processes influence the ...