Artikler, rapporter og annet (arktisk og marin biologi): Nye registreringer
Viser treff 261-280 av 1535
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Geomechanical assessment of the Lower Turonian AR-F limestone Member, Abu Gharadig Field, Egypt: Implications for unconventional resource development
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-08)This study evaluates the unconventional reservoir geomechanical characteristics of the Lower Turonian Abu Roash-F (AR-F) carbonates from the Abu Gharadig field, onshore Egypt, which has not been attempted before. The interval dominantly consists of planktic foraminifera and micrite matrix. The AR-F marine carbonate is organic-rich (0.59–3.57 wt% total organic carbon), thermally mature (435–441°C ... -
Floods and flood management and its socio-economic impact on Pakistan: A review of the empirical literature
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-01)Flood is one of the most damaging natural disasters as the recent floods have shown their serious impact on Pakistan. Flood control and regulation policies are essential to reduce the risks of economic downturn, a threat to human existence, and to sustain the ecology. The severity of flood catastrophe activities represents a constant and severe issue in the world. Floods are rising year by year ... -
Spatiotemporal dynamics of forest geometrid outbreaks
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-24)We highlight recent developments and avenues for advancement, which can improve insight into the causes of changes in the spatiotemporal dynamics of forest Geometridea moth species (hereafter ‘geometrids’). Some forest geometrids possess fundamental biological traits, which make them particularly liable to outbreak range expansions and host shifts mitigated by climate change. Indeed, recently ... -
First trait-based characterization of Arctic ice meiofauna taxa
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-18)Trait-based approaches connect the traits of species to ecosystem functions to estimate the functional diversity of communities and how they may respond to environmental change. For the first time, we compiled a traits matrix across 11 traits for 28 species of Arctic ice meiofauna, including Copepoda (Subclass), Nematoda (Phylum), Acoela (Order), Rotifera (Phylum), and Cnidaria (Phylum). Over 50 years ... -
Characteristics of early Atlantic cod (Gadus morhua L.) catches based on otoliths recovered from archaeological excavations at medieval to early modern sites in northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-17)We compared stock origin, size- and age-distributions, and length growth rates derived from Atlantic cod otoliths from archaeological excavations at two sites in northern Norway: Vágar in Lofoten (68◦12 N, ad 1156–1285) and the Værbukta site (70◦57 N, ad 1450–1680). For comparison, modern otoliths were sampled during 1993–2001 from areas situated close to Vágar and Værbukta. Length-at-age from ... -
Origin of marine invertebrate larvae on an Arctic inflow shelf
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-20)Many benthic invertebrate taxa possess planktonic early life stages which drift with water currents and contribute to dispersal of the species, sometimes reaching areas beyond the current ranges of the adults. Until recently, it had been difficult to identify planktonic larvae to species level due to lack of distinguishing features, preventing detection of expatriate species. Here, we used DNA ... -
Natural variation in snow depth and snow melt timing in the High Arctic have implications for soil and plant nutrient status and vegetation composition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-16)Snow cover is a key component in Arctic ecosystems and will likely be affected by changes in winter precipitation. Increased snow depth and consequent later snowmelt leads to greater microbial mineralization in winter, improving soil and vegetation nutrient status. We studied areas with naturally differing snow depths and date of snowmelt in Adventdalen, Svalbard. Soil properties, plant leaf ... -
Challenges and opportunities when implementing strategic foresight: lessons learned when engaging stakeholders in climate-ecological research
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-13)Ecosystems are currently experiencing rapid changes. Decision-makers need to anticipate future changes or challenges that will emerge in order to implement both short-term actions and long-term strategies for reducing undesirable impacts. Strategic foresight has been proposed to help resolve these challenges for better planning and decision-making in an uncertain future. This structured process ... -
Temporal dynamics in zooplankton δ13C and δ15N isoscapes for the North Atlantic Ocean: Decadal cycles, seasonality, and implications for predator ecology
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-17)The limited amount of ecological data covering offshore parts of the ocean impedes our ability to understand and anticipate the impact of anthropogenic stressors on pelagic marine ecosystems. Isoscapes, i.e., spatial models of the distribution of stable isotope ratios, have been employed in the recent years to investigate spatio-temporal patterns in biogeochemical process and ecological responses. ... -
Ectoparasites population dynamics are affected by host body size but not host density or water temperature in a 32-year long time series
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-22)Host density, host body size and ambient temperature have all been positively associated with increases in parasite infection. However, the relative importance of these factors in shaping long-term parasite population dynamics in wild host populations is unknown due to the absence of long-term studies. Here, we examine long-term drivers of gill lice (Copepoda) infections in Arctic charr (Salmonidae) ... -
Joining the dots: systematics and biogeography of Punctoidea land snails
(Conference object; Konferansebidrag, 2022-11) -
Dynamical Controls of the Eastward Transport of Overwintering Calanus finmarchicus From the Lofoten Basin to the Continental Slope
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-06)Diapausing populations of Calanus finmarchicus at depth in the Lofoten Basin (LB) return to the continental shelf and slope off the Lofoten-Vesterålen Islands during the phytoplankton spring bloom to feed and spawn, forming surface swarms with a great abundance. To study how overwintering populations of C. finmarchicus move with the deep currents and return to the shelf, Lagrangian transport ... -
Multiomics in the central Arctic Ocean for benchmarking biodiversity change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-17)Multiomics approaches need to be applied in the central Arctic Ocean to benchmark biodiversity change and to identify novel species and their genes. As part of MOSAiC, EcoOmics will therefore be essential for conservation and sustainable bioprospecting in one of the least explored ecosystems on Earth. -
Small hydropower, large obstacle? Exploring land use conflict, Indigenous opposition and acceptance in the Norwegian Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-23)In this study, we explore Indigenous energy opposition to and acceptance of small hydropower development. In Sapmi ´ (i.e., the traditional homeland of the Indigenous S´ ami people), land development poses a major threat to the cultural and material needs of the S´ ami people through the loss of pastures essential to Sami ´ reindeer herding. In contrast to large-scale renewable energy projects ... -
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-20)Arctic marine ecosystems are strongly influenced by the extreme seasonality of light in the region. Accurate determination of light is essential for building a comprehensive understanding of the dynamics of animal and aquatic algae populations. Current approaches to underwater light field parameterisations rely upon shortwave radiation (300–3000 nm) estimates from satellites or surface radiometry ... -
An Artificial Neural Network Algorithm to Retrieve Chlorophyll a for Northwest European Shelf Seas from Top of Atmosphere Ocean Colour Reflectance
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-12)Chlorophyll-a (Chl) retrieval from ocean colour remote sensing is problematic for relatively turbid coastal waters due to the impact of non-algal materials on atmospheric correction and standard Chl algorithm performance. Artificial neural networks (NNs) provide an alternative approach for retrieval of Chl from space and results for northwest European shelf seas over the 2002–2020 period are ... -
Temperature has a major effect on the cuticular wax composition of bilberry (Vaccinium myrtillus L.) fruit
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-20)Cuticle is the first layer protecting plants against external biotic and abiotic factors and is responsive to climatic factors as well as determined by genetic adaptations. In this study, the chemical composition of bilberry fruit cuticular wax was investigated through a latitudinal gradient from Latvia (56◦N 24◦E) through Finland (65◦N 25◦E) to northern Norway (69◦N 18◦E) in two seasons 2018 ... -
Global patterns in endemicity and vulnerability of soil fungi
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-19)Fungi are highly diverse organisms, which provide multiple ecosystem services. However, compared with charismatic animals and plants, the distribution patterns and conservation needs of fungi have been little explored. Here, we examined endemicity patterns, global change vulnerability and conservation priority areas for functional groups of soil fungi based on six global surveys using a ... -
Source rock geochemical assessment and estimation of TOC using well logs and geochemical data of Talhar Shale, Southern Indus Basin, Pakistan
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-01)Assessment of organic carbon content (TOC) by geophysical logs has been a challenging task in the formation evaluation of shale gas. This research is conducted to estimate the unconventional hydrocarbon (shale-gas) potential of Talhar Shale in the Southern Indus Basin (SIB), Pakistan. In this study, total organic carbon content (%) was estimated through well logs by different methods and then ... -
Experimentally increased snow depth affects high Arctic microarthropods inconsistently over two consecutive winters
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-27)Climate change induced alterations to winter conditions may afect decomposer organisms controlling the vast carbon stores in northern soils. Soil microarthropods are particularly abundant decomposers in Arctic ecosystems. We studied whether increased snow depth afected microarthropods, and if efects were consistent over two consecutive winters. We sampled Collembola and soil mites from a snow ...