A5024232291- Microbial Community Ecology and Physiology
- Marine and coastal plant biology
- Coastal wetland ecosystem dynamics
- Protist diversity and phylogeny
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Soil and Water Nutrient Dynamics
- Gut microbiota and health
- Environmental DNA in Biodiversity Studies
- Genomics and Phylogenetic Studies
- Ruminant Nutrition and Digestive Physiology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Peatlands and Wetlands Ecology
- Wastewater Treatment and Nitrogen Removal
- Freshwater macroinvertebrate diversity and ecology
- Fire effects on ecosystems
- Water Treatment and Disinfection
- Bacteriophages and microbial interactions
- Isotope Analysis in Ecology
- Aquatic Invertebrate Ecology and Behavior
- Lichen and fungal ecology
- Social and Educational Sciences
- Insect symbiosis and bacterial influences
- Vibrio bacteria research studies
- Seaweed-derived Bioactive Compounds
Institute of Marine Biotechnology
2022-2025
Universität Greifswald
2016-2025
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2024
Czech Academy of Sciences, Institute of Microbiology
2019-2024
Max Planck Institute for Marine Microbiology
2023
University of Bremen
2023
University of Vienna
2012-2018
Wasser Cluster Lunz
2014-2015
University of Bergen
2010-2012
Swedish University of Agricultural Sciences
2000
Abstract Trophic interactions are crucial for carbon cycling in food webs. Traditionally, eukaryotic micropredators considered the major of bacteria soils, although like myxobacteria and Bdellovibrio also known bacterivores. Until recently, it was impossible to assess abundance prokaryotes eukaryotes soil webs simultaneously. Using metatranscriptomic three-domain community profiling we identified pro- 11 European mineral organic soils from different climes. Myxobacteria comprised 1.5–9.7%...
Abstract Background Marine microalgae (phytoplankton) mediate almost half of the worldwide photosynthetic carbon dioxide fixation and therefore play a pivotal role in global cycling, most prominently during massive phytoplankton blooms. Phytoplankton biomass consists considerable proportions polysaccharides, substantial parts which are rapidly remineralized by heterotrophic bacteria. We analyzed diversity, activity, functional potential such polysaccharide-degrading bacteria different size...
Bacteria belonging to Planctomycetes display several unique morphological and genetic features are found in a wide variety of habitats on earth. Their ecological roles these still poorly understood. have previously been detected throughout the year surfaces kelp Laminaria hyperborea from southwestern Norway. We aimed make detailed investigation abundance phylogenetic diversity planctomycetes inhabiting surfaces. accounted for 51-53% bacterial biofilm cells July September 24% February...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 60:71-83 (2010) - DOI: https://doi.org/10.3354/ame01409 Seasonal dynamics of bacterial biofilms on kelp Laminaria hyperborea Mia M. Bengtsson*, Kjersti Sjøtun, Lise Øvreås Department Biology, University Bergen, Box 7803, 5020 Bergen *Email: mia.bengtsson@bio.uib.no ABSTRACT: variations cell density and community...
Organic matter (OM) is degraded during transport from soils to oceans. However, there are spatial and temporal variabilities along the aquatic continuum, which hamper development of carbon cycling models. One concept that has been applied in this context priming effect (PE), describing non-additive effects on OM degradation after mixing sources contrasting bioavailability. Studies PE report divergent results positive (increased rates) neutral, negative (decreased upon mixing. Here, we aim...
Ruminant livestock is a major source of the potent greenhouse gas methane. The complex rumen microbiome, consisting bacteria, archaea, and microbial eukaryotes, facilitates anaerobic plant biomass degradation in cow rumen, leading to methane emissions. Using an integrated approach combining multidomain quantitative metatranscriptomics with volatile fatty acid (VFA) profiling, we aimed at obtaining most comprehensive picture active microbiome during feed date. Bacterial, archaeal, eukaryotic...
DNA sequencing technology has proven very valuable for analysing the microbiota of poorly accessible ecosystems such as hydrothermal vents. Using a combination amplicon and shotgun small-subunit rRNA its gene, we examined composition diversity microbial communities from recently discovered Jan Mayen vent field, located on Mohn's Ridge in Norwegian-Greenland Sea. The were dominated by epsilonproteobacterial genera Sulfurimonas Sulfurovum. These are mesophiles involved sulphur metabolism...
The priming effect refers to quantitative changes in microbial decomposition of recalcitrant organic matter upon addition labile and is a phenomenon that mainly has been reported debated soil science. Recently, effects have indicated aquatic ecosystems received attention due the potential significance for ecosystem carbon budgets. Headwater stream biofilms, which are important degraders both allochthonous, presumably recalcitrant, autochthonous matter, may be sites where environments. We...
Abstract Phytoplankton blooms provoke bacterioplankton blooms, from which bacterial biomass (necromass) is released via increased zooplankton grazing and viral lysis. While consumption of algal during well-studied, little known about the concurrent recycling these substantial amounts necromass. We demonstrate that biomass, such as alpha-glucan storage polysaccharides, generated organic matter, reused thus itself a major carbon source in vitro diatom-dominated bloom. highlight conserved...
Changes in the riparian vegetation along stream channels, diurnal light availability, and longitudinal fluctuations local regime streams influence primary production carbon (C) cycling benthic biofilms. To investigate of availability on uptake dynamics autochthonous allochthonous dissolved organic (DOC) biofilms, we experimentally added 13C-labeled DOC to biofilms grown under intensities ranging from 5 152 μmol photons m−2 s−1. We calculated net C flux, which showed that released across...
Eelgrass (Zostera marina) is a marine foundation species essential for coastal ecosystem services around the northern hemisphere. Like all macroscopic organisms, it possesses microbiome (here defined as an associated prokaryotic community) which may play critical roles in modulating interaction of eelgrass with its environment. For example, leaf surface could inhibit or attract eukaryotic epibionts overgrow leading to reduced primary productivity and subsequent meadow decline. We used...
Changes in riparian vegetation or water turbidity and browning streams alter the local light regime with potential implications for stream biofilms ecosystem functioning. We experimented microcosms grown under a gradient of intensities (range: 5-152 μmole photons s(-1) m(-2) ) combined 454-pyrosequencing enzymatic activity assays to evaluate effects on biofilm structure function. observed shift bacterial community composition along gradient, whereas there was no apparent change alpha...
Abstract Phototrophic biofilms are ubiquitous in freshwater and marine environments where they critical for biogeochemical cycling, food webs industrial applications. In streams, phototrophic dominate benthic microbial life harbour an immense prokaryotic eukaryotic biodiversity with biotic interactions across domains trophic levels. Here, we examine how community structure function of these respond to varying light availability, as the crucial energy source biofilms. Using...
Non-flow periods in fluvial ecosystems are a global phenomenon. Streambed drying and rewetting by sporadic rainfalls could drive considerable changes the microbial communities that govern stream nitrogen (N) availability at different temporal spatial scales. We performed microcosm-based experiment to investigate how dry period duration (DPD) (0, 3, 6, 9 weeks) magnitude of rainfall 4, 21 mm applied end period) affected stocks N riverbed sediments, ammonia-oxidizing bacteria (AOB) archaea...
Climate change-related heatwaves are major threats to biodiversity and ecosystem functioning. However, our current understanding of the mechanisms governing community resistance recovery from extreme temperature events is still rudimentary. The spatial insurance hypothesis postulates that diverse regional species pools can buffer functioning against local disturbances through immigration better-adapted taxa. Yet, experimental evidence for such predictions multi-trophic communities pulse-type...
Abstract Background Zostera marina is an important ecosystem engineer influencing shallow water environments and possibly shaping the microbiota in surrounding sediments water. Z. typically found marine systems, but it can also proliferate under brackish conditions. Changes salinity generally have a strong impact on biota, especially at salty divide between 6 9. To better understand of interaction sediment microbiota, we investigated effects meadows across range 6–15 Baltic Sea during summer...
Abstract Kelp deforestation by sea urchin grazing is a widespread phenomenon globally, with vast consequences for coastal ecosystems. The ability of urchins to survive on kelp diet poor nutritional quality not well understood and bacterial communities in the intestine may play an important role digestion. A no-choice feeding experiment was conducted Strongylocentrotus droebachiensis, offering three different seaweeds as diet, including Saccharina latissima. Starved served experimental...
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:...
Headwater streams are tightly connected with the terrestrial milieu from which they receive deliveries of organic matter, often through hyporheic zone, transition between groundwater and streamwater. Dissolved matter (DOM) sources (that is, allochthonous) enters where it may mix DOM in situ production autochthonous) most microbial activity takes place. Allochthonous is typically considered resistant to metabolism compared autochthonous DOM. The composition functioning biofilm communities...
Drained peatlands are significant sources of the greenhouse gas (GHG) carbon dioxide. Rewetting is a proven strategy used to protect stocks; however, it can lead increased emissions potent GHG methane. The response rewetting soil microbiomes as drivers these processes poorly understood, biotic and abiotic factors that control community composition. We analyzed pro- eukaryotic three contrasting pairs minerotrophic fens subject decade-long drainage subsequent long-term rewetting. Abiotic...
Many ecological and evolutionary processes in animals depend upon microbial symbioses. In spiders, the role of microbiome these remains mostly unknown. We compared between populations, individuals, tissue types a range-expanding spider, using 16S rRNA gene sequencing. Our study is one first to go beyond targeting known endosymbionts spiders characterizes total across different body compartments (leg, prosoma, hemolymph, book lungs, ovaries, silk glands, midgut, fecal pellets). Overall,...