Anna Vader
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View article: Biodiversity changes in Arctic coastal ecosystems under borealization
Biodiversity changes in Arctic coastal ecosystems under borealization Open
Climate change is playing a major role in the current global biodiversity crisis. However, despite climate change being most pronounced in the Arctic, its impacts on biodiversity in this region remains largely unknown. Here, we combined th…
View article: Eukaryote diets in Arctic marine nematodes across seasons and shelf-to-basin gradients
Eukaryote diets in Arctic marine nematodes across seasons and shelf-to-basin gradients Open
Marine nematodes dominate the meiofauna of benthic sediments, but few studies have investigated their trophic roles. We studied the eukaryote diet composition of nematodes from surface sediments on the Arctic Barents Sea shelf, shelf break…
View article: Nansen and Amundsen basins: Gradients of physico-chemical properties and biota composition with implications for future resource management of the central Arctic Ocean
Nansen and Amundsen basins: Gradients of physico-chemical properties and biota composition with implications for future resource management of the central Arctic Ocean Open
The projected transition of the central Arctic Ocean (CAO) into a warmer, seasonally ice-free ocean requires more knowledge of this environment to predict changes in the structure and dynamics of its ecosystems. We aimed to compare the sta…
View article: Seasonality and interannual variability of an Arctic marine time series, IsA
Seasonality and interannual variability of an Arctic marine time series, IsA Open
The Arctic is warming twice as fast as anywhere else on the planet, in the European Arctic mainly driven by exalted Atlantic Water inflow. Microbial eukaryotes are diverse and essential to the functioning of marine ecosystems, thus environ…
View article: Dietary plasticity in small Arctic copepods as revealed with prey metabarcoding
Dietary plasticity in small Arctic copepods as revealed with prey metabarcoding Open
Objectives Small copepods (<2 mm) compose an important constituent of the Arctic marine food web, but their trophic interactions remain largely unexplored, partly due to methodological limitations. Methods We here characterize the prey …
View article: Seasonality in phytoplankton communities and production in three Arctic fjords across a climate gradient
Seasonality in phytoplankton communities and production in three Arctic fjords across a climate gradient Open
Phytoplankton communities and production in Arctic fjords undergo strong seasonal variations. Phytoplankton blooms are periods with high primary production, leading to elevated algal biomass fueling higher trophic levels. Blooms are typica…
View article: Brute force prey metabarcoding to explore the diets of small invertebrates
Brute force prey metabarcoding to explore the diets of small invertebrates Open
Prey metabarcoding has become a popular tool in molecular ecology for resolving trophic interactions at high resolution, from various sample types and animals. To date, most predator–prey studies of small‐sized animals (<1 mm) have met the…
View article: Seasonality in land–ocean connectivity and local processes control sediment bacterial community structure and function in a High Arctic tidal flat
Seasonality in land–ocean connectivity and local processes control sediment bacterial community structure and function in a High Arctic tidal flat Open
Climate change is altering patterns of precipitation, cryosphere thaw, and land–ocean influxes, affecting understudied Arctic estuarine tidal flats. These transitional zones between terrestrial and marine systems are hotspots for biogeoche…
View article: Brute force prey metabarcoding to explore the diets of small invertebrates
Brute force prey metabarcoding to explore the diets of small invertebrates Open
1. Prey metabarcoding has become a popular tool in molecular ecology for resolving trophic interactions at high resolution, from various sample types and animals. To date, most predator-prey studies of small-sized animals (<1 mm) have met …
View article: Seasonality of the bacterial and archaeal community composition of the Northern Barents Sea
Seasonality of the bacterial and archaeal community composition of the Northern Barents Sea Open
The Barents Sea is a transition zone between the Atlantic and the Arctic Ocean. The ecosystem in this region is highly variable, and a seasonal baseline of biological factors is needed to monitor the effects of global warming. In this stud…
View article: The mystery of the ice cold rose—Microbiome of an Arctic winter frost flower
The mystery of the ice cold rose—Microbiome of an Arctic winter frost flower Open
Under very cold conditions, delicate ice‐crystal structures called frost flowers emerge on the surface of newly formed sea ice. These understudied, ephemeral structures include saline brine, organic material, inorganic nutrients, and bacte…
View article: Seasonal cruise Q4 2019
Seasonal cruise Q4 2019 Open
This cruise was the second of in total four seasonal cruises with RV Kronprins Haakon in 2019/20 focusing on biology in the project Arven etter Nansen (AeN). This seasonal cruise was named Q4 (Q4= 4th quarter of the year) investigating in …
View article: Satellite-Derived Photosynthetically Available Radiation at the Coastal Arctic Seafloor
Satellite-Derived Photosynthetically Available Radiation at the Coastal Arctic Seafloor Open
Climate change has affected the Arctic Ocean (AO) and its marginal seas significantly. The reduction of sea ice in the Arctic region has altered the magnitude of photosynthetically available radiation (PAR) entering the water column, impac…
View article: Multiomics in the central Arctic Ocean for benchmarking biodiversity change
Multiomics in the central Arctic Ocean for benchmarking biodiversity change Open
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 b…
View article: Joint Cruise 2-2 2021
Joint Cruise 2-2 2021 Open
The main scientific goal of the Nansen Legacy JC2-2 cruise was to extend the project’s research activities from the northern Barents Sea shelf into the central Arctic Ocean. Specifically, JC2-2 addressed objectives of the research foci RF1…
View article: Seasonal Cruise Q3
Seasonal Cruise Q3 Open
The Nansen Legacy Q3 cruise, 5-27 August 2019, initiated the seasonal investigations of the Nansen Legacy transect. The transect represent an environmental gradient going through the northern Barents Sea, and included 7 process stations (P…
View article: Linking extreme seasonality and gene expression in arctic marine protists
Linking extreme seasonality and gene expression in arctic marine protists Open
At high latitudes, strong seasonal differences in light availability affect marine organisms and restrict the timing of ecosystem processes. Marine protists are key players in Arctic aquatic ecosystems, yet little is known about their ecol…
View article: High Concentrations of Perfluoroalkyl Acids in Arctic Seawater Driven by Early Thawing Sea Ice
High Concentrations of Perfluoroalkyl Acids in Arctic Seawater Driven by Early Thawing Sea Ice Open
Poly- and perfluoroalkyl substances are synthetic chemicals that are widely present in the global environment including the Arctic. However, little is known about how these chemicals (particularly perfluoroalkyl acids, PFAA) enter the Arct…
View article: When a Year Is Not Enough: Further Study of the Seasonality of Planktonic Protist Communities Structure in an Ice-Free High Arctic Fjord (Adventfjorden, West Spitsbergen)
When a Year Is Not Enough: Further Study of the Seasonality of Planktonic Protist Communities Structure in an Ice-Free High Arctic Fjord (Adventfjorden, West Spitsbergen) Open
As a contribution to understanding the ecological framework of protistan seasonal succession patterns, we present the weekly-to-monthly (January–October) light microscopy-based study of nano- and microplanktonic protist communities of Adve…
View article: Environmental status of Svalbard coastal waters: coastscapes and focal ecosystem components (SvalCoast)
Environmental status of Svalbard coastal waters: coastscapes and focal ecosystem components (SvalCoast) Open
This is chapter 6 of the State of Environmental Science in Svalbard (SESS) report 2020 (https://sios-svalbard.org/SESS_Issue3). Coastal waters are among the most productive regions in the Arctic. These nearshore waters are critical breedin…
View article: Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb?
Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb? Open
This is a dataset containing fragments of internal transcribed spacer 2 (ITS2) extracted from Bistorta vivipara root-associated fungi, sampled from snow fence experiment in Adventdalen, Svalbard. This dataset was used in Wutkowska et al., …
View article: Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb?
Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb? Open
This is a dataset containing fragments of internal transcribed spacer 2 (ITS2) extracted from Bistorta vivipara root-associated fungi, sampled from snow fence experiment in Adventdalen, Svalbard. This dataset was used in Wutkowska et al., …
View article: Joint Cruise 1-2 2018
Joint Cruise 1-2 2018 Open
Joint Cruise 1-2 with R/V Kronprins Haakon addressed objectives of RF1, RF2 and RF3 on the Nansen Legacy main transect in open water and within the sea ice. The focus was on comparing the state of the physical, chemical and biological cond…
View article: Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb?
Can root-associated fungi mediate the impact of abiotic conditions on the growth of a High Arctic herb? Open
Arctic plants are affected by many stressors. Root-associated fungi are thought to influence plant performance in stressful environmental conditions. However, the relationships are not transparent; do the number of fungal partners, their e…