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norskBlar i forfatter "Müller, Oliver"
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Bacterial response to permafrost derived organic matter input in an Arctic fjord
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-06)The warming of the Arctic causes increased riverine discharge, coastal erosion, and the thawing of permafrost. Together, this is leading to an increased wash out of terrestrial dissolved organic matter (tDOM) into the coastal Arctic ecosystems. This tDOM may be anticipated to affect both carbon and nutrient flow in the microbial food web and microbial community composition, but there are few ... -
Changes in marine prokaryote composition with season and depth over an Arctic polar year
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-13)As the global climate changes, the higher latitudes are seen to be warming significantly faster. It is likely that the Arctic biome will experience considerable shifts in ice melt season length, leading to changes in photoirradiance and in the freshwater inputs to the marine environment. The exchange of nutrients between Arctic surface and deep waters and their cycling throughout the water column ... -
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux
(Journal article; Tidsskriftartikkel, 2023-03-27)The decrease in Arctic sea-ice extent and thickness as a result of global warming will impact the timing, duration, magnitude and composition of phytoplankton production with cascading effects on Arctic marine food-webs and biogeochemical cycles. Here, we elucidate the environmental drivers shaping the composition, abundance, biomass, trophic state and vertical flux of protists (unicellular eukaryotes), ... -
How microbial food web interactions shape the arctic ocean bacterial community revealed by size fractionation experiments
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-17)In the Arctic, seasonal changes are substantial, and as a result, the marine bacterial community composition and functions differ greatly between the dark winter and light-intensive summer. While light availability is, overall, the external driver of the seasonal changes, several internal biological interactions structure the bacterial community during shorter timescales. These include specific ... -
Interannual differences in sea ice regime in the north-western Barents Sea cause major changes in summer pelagic production and export mechanisms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)The Barents Sea is a highly dynamic and productive marine ecosystem and a hotspot of global warming. Variability in sea ice extent is a common feature in the Barents Sea with substantial movements of the sea ice edge on short-term, seasonal to interannual time scales. Historically the northern Barents Sea (north of 75◦N) has been ice-covered in winter, but recently it has become the area with most ... -
Masked constituent priming of English compounds in native and non-native speakers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-19)The present research explores the degree of morphological structure of compound words in the native and non-native lexicons, and provides additional data on the access to these representations. Native and non-native speakers (L1 Spanish) of English were tested using a lexical decision task with masked priming of the compound’s constituents in isolation, including two orthographic conditions to control ... -
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. -
Snowmelt contribution to Arctic first-year ice ridge mass balance and rapid consolidation during summer melt
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-29)An assessment of potential groundwater areas in the Ifni basin, located in the western AntiAtlas range of Morocco, was conducted based on a multicriteria analytical approach that integrated a set of geomorphological and hydroclimatic factors influencing the availability of this resource. This approach involved the use of geographic information systems (GIS) and hierarchical analytical process ... -
Synechococcus in the Atlantic Gateway to the Arctic Ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-05)Increasing temperatures, with pronounced effects at high latitudes, have raised questions about potential changes in species composition, as well as possible increased importance of small-celled phytoplankton in marine systems. In this study, we mapped out one of the smallest and globally most widespread primary producers, the picocyanobacterium Synechococcus, within the Atlantic inflow to ... -
Temporal evolution of under-ice meltwater layers and false bottoms and their impact on summer Arctic sea ice mass balance
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-31)Low-salinity meltwater from Arctic sea ice and its snow cover accumulates and creates under-ice meltwater layers below sea ice.These meltwater layers can result in the formation of new ice layers, or false bottoms, at the interface of this low-salinity meltwater and colder seawater. As part of the Multidisciplinary drifting Observatory for the Study of the Arctic Climate (MOSAiC), we used a ... -
Thin and transient meltwater layers and false bottoms in the Arctic sea ice pack-Recent insights on these historically overlooked features
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-07)The rapid melt of snow and sea ice during the Arctic summer provides a significant source of low-salinity meltwater to the surface ocean on the local scale. The accumulation of this meltwater on, under, and around sea ice floes can result in relatively thin meltwater layers in the upper ocean. Due to the small-scale nature of these upper-ocean features, typically on the order of 1 m thick or less, ...
