A5076722343- Microbial Community Ecology and Physiology
- Marine Ecology and Invasive Species
- Genomics and Phylogenetic Studies
- Bacteriophages and microbial interactions
- Myxozoan Parasites in Aquatic Species
- Parasite Biology and Host Interactions
- Aquatic Invertebrate Ecology and Behavior
- Evolution and Genetic Dynamics
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Identification and Quantification in Food
- Parasitic infections in humans and animals
- Protist diversity and phylogeny
- Respiratory viral infections research
- Marine Biology and Ecology Research
- Microbial Natural Products and Biosynthesis
- Marine and coastal plant biology
- Environmental DNA in Biodiversity Studies
- Mine drainage and remediation techniques
- Diatoms and Algae Research
- Algal biology and biofuel production
- Aquaculture disease management and microbiota
- Plant Virus Research Studies
- Infectious Diseases and Mycology
- Indigenous Studies and Ecology
Norwegian Institute of Marine Research
2020-2024
University of Bergen
2012-2021
Significance This work presents the first detailed analysis to authors’ knowledge of how species-level diversity is a property emerging from competitive and defensive abilities at organism level in microbial system where diversity-generating mechanism strain-specific viral lysis. The theoretical constitutes general case treatment important special question what properties may make SAR11, subphylum within Alphaproteobacteria, so dominant pelagic environment. resulting conceptual framework...
Microalgae could provide a sustainable alternative to fish oil as source for the omega-3 polyunsaturated fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic (DHA). However, growing microalgae on large-scale is still more cost-intensive than production, outdoor productivities vary greatly with reactor type, geographic location, climate conditions species or even strains. The diatom Phaeodactylum tricornutum has been intensively investigated its potential in due robustness...
Aeromonas are widespread in aquatic environments and considered emerging pathogens humans animals. Multidrug resistant (MDR) circulating the environment food production chain can potentially disseminate antimicrobial resistance (AMR) to via foodborne route. In this study, we aimed investigate AMR virulence factors of 22 strains isolated from ready-to-eat (RTE) seafood. A multilocus phylogenetic analysis (MLPA) using concatenated sequences six housekeeping genes (gyrB, rpoD, gyrA, recA, dnaJ,...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 62:191-199 (2011) - DOI: https://doi.org/10.3354/ame01477 Utilization of kelp-derived carbon sources by kelp surface-associated bacteria Mia M. Bengtsson1,2,*, Kjersti Sjøtun1, Julia E. Storesund1, Lise Øvreås1,2 1Department Biology, and 2Centre for Geobiology, University Bergen, Box 7803, 5020 Norway *Email:...
By adding a generic description of cost resistance (COR) to the existing 'killing-the-winner' model, we show how this expands model's explanatory power include rank-abundance relationships in host population. The model can predict counter-intuitive relationship previously suggested literature, where abundant viruses are associated with rare hosts and vice versa. explains observed dominance slow-growing prokaryotes as result successful defence strategies, rather than dormancy lacking...
The Arctic marine environment experiences dramatic seasonal changes in light and nutrient availability. To investigate the influence of seasonality on virus communities, five research cruises to west north Svalbard were conducted across one calendar year, collecting water from surface 1000 m depth. We employed metabarcoding analysis major capsid protein g23 mcp genes order T4-like myoviruses large dsDNA viruses infecting prokaryotic eukaryotic picophytoplankton, respectively. Microbial...
There is a strong need to develop new drugs against many severe diseases. Therapy resistance major problem in, for instance, infectious diseases and cancer. Drug discovery has again turned nature search molecules that can become drug leads. Although bacterial phyla are extensively studied, some, like the Planctomycetes, remain largely unexplored as potential sources of Planctomycetes form diverse group bacteria with peculiar characteristics such division by polar budding absence FtsZ gene....
Trophic mechanisms that can generate biodiversity in food webs include bottom-up (growth rate regulating) and top-down (biomass factors. The control has traditionally been analyzed using the concepts of "Keystone Predation" (KP) "Killing-the-Winner" (KtW), predominately occuring discussions macro- micro-biological ecology, respectively. Here we combine classical diamond-shaped web structure frequently discussed KP analyses KtW concept by introducing a defense strategist capable partial...
We investigated the relationship between viruses and co-occurring bacterial communities in Sognefjord, a deep-silled fjord Western Norway. A combination of flow cytometry automated ribosomal intergenic spacer analysis (ARISA) was used to assess prokaryote viral abundances, diversity community composition, respectively, depth profiles at two different sampling seasons (November May). With one exception, did not vary samples regardless or season. The virus abundances as well however, varied...
Northeast Atlantic (NEA) mackerel (Scomber scombrus, Scombridae) represents an economically important target for the Norwegian pelagic fishing industry. Despite commercial significance of NEA mackerel, little is known about infections with myxosporean parasite Kudoa thyrsites (Kudoidae). The may cause post-mortem myoliquefaction fish skeletal muscle and therefore reduce quality product. In this study, we examined ‘soft flesh’ occurrence in size groups ‘autumn mackerel’ caught between 2007...
Northeast Arctic cod, saithe and haddock are among the most important fisheries resources in Europe, largely shipped to various continental markets. The present study aimed map presence distribution of larvae parasitic nematodes Anisakidae family which socioeconomic public health concern. Fishes were sourced from commercial catches during winter or spring southern Barents Sea. Samples fish inspected for using UV-press method while anisakid species identification relied on sequencing mtDNA...
The Arctic is warming 2-3 times faster than the global average, leading to a decrease in sea ice extent, thickness, and associated changes structure. These impact habitat properties ice-associated ecosystems. Sea-ice algal blooms provide various algal-derived carbon sources for bacterial archaeal communities within ice. Here, we detail transition of these from winter through spring early summer during Norwegian young ICE (N-ICE2015) expedition. community was dominated by archaeon
Nematode parasites of the genus Anisakis (Nematoda, Anisakidae) are considered among most important biological hazards in seafood products worldwide. In temperate and tropical waters, common species appears to be typica, generally found around viscera sporadically flesh various fish host species. This study investigated infection sites genetic diversity A. typica infecting commercial fishes from South-West Indian Ocean. Largehead hairtail (N = 20) brushtooth lizardfish 72) fished off...
Meromictic lakes are permanently stratified that display steep gradients in salinity, oxygen and sulphur compounds tightly linked to bacterial community structure diversity. Lake Sælenvannet is a meromictic lake located south of Bergen, Norway. The 26 m deep connected the open sea into two layers separated by chemocline. upper water layer brackish with major input from runoff surroundings. bottom consists old saline low or no concentrations. Bacteria phylum Planctomycetes reported be...
Abstract On the deep and dark seafloor, a cryptic yet untapped microbial diversity flourishes around hydrothermal vent systems. This remote environment of difficult accessibility exhibits extreme conditions, including high pressure, steep temperature- redox gradients, limited availability oxygen complete darkness. In this study, we analysed genomes three aerobic strains belonging to phylum Planctomycetota that were isolated from two deep-sea iron- rich hydroxide deposits with low temperature...
Here we present novel data on bacterial assemblages along a coast-fjord gradient in the Sognefjord, deepest (1308 m) and longest (205 km) ice-free fjord world. Data were collected two cruises, one November 2012, May 2013. Special focus was impact of advective processes how these are reflected autochthonous allochthonous fractions communities. Both community composition, determined by Automated Ribosomal Intergenic Spacer Analyses (ARISA), surface intermediate water appeared to be highly...
Myxosporean parasites of the genus Kudoa are fish great economic importance, as some species can affect fillet quality by producing macroscopic cysts or generating post mortem myoliquefaction, commonly referred to 'soft flesh'. mirabilis is a flesh'-inducing originally described based on morphology in musculature Trichiurus lepturus from Indian Ocean. An integrative morphological and genetic characterization K. type host caught off coast Tanzania here provided. The spores were stellate with...
Kudoa thyrsites is a myxosporean parasite (Cnidaria, Myxozoa) that infects the skeletal and cardiac muscle of Northeast Atlantic (NEA) mackerel (Scomber scombrus). Heavy infections are associated with post-mortem myoliquefaction host which reduces quality fish product. The biological infection characteristics in NEA poorly known. This study examined distribution K. various organs from northern North Sea, elucidates relationship between density infection, developmental stage musculature,...
Small pelagic fishes represent one of the most important food resources off Northwest coast Africa. Despite their economic significance, little is known about infections with flesh invading myxosporean parasites genus Kudoa (Cnidaria, Myxozoa). Heavy in may be associated post-mortem myoliquefaction, commonly as 'soft flesh'. This condition reduce quality and marketability fish fillet, resulting both losses to fishing industry loss consumer confidence. In this study, we investigated...
Kudoa thyrsites is a myxosporean parasite that infects the skeletal muscle of various teleost fish species globally. Severe infections lead to 'soft flesh' in fillets, resulting food spoilage and subsequent discard. While K. has previously been identified migratory Atlantic mackerel northern Northeast Ocean, it not observed resident or farmed Norwegian waters until now. This study presents first evidence infection associated condition commercially important gadoid from waters, including...