A5078670759- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Genomics and Phylogenetic Studies
- Climate change and permafrost
- Protist diversity and phylogeny
- Environmental DNA in Biodiversity Studies
- Hydrocarbon exploration and reservoir analysis
- Microbial metabolism and enzyme function
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Botany and Plant Ecology Studies
- Wastewater Treatment and Nitrogen Removal
- Gut microbiota and health
- Peatlands and Wetlands Ecology
- Bacteriophages and microbial interactions
- Cryospheric studies and observations
- Lichen and fungal ecology
- Agronomic Practices and Intercropping Systems
- Carbon Dioxide Capture Technologies
- Neonatal Respiratory Health Research
- Ammonia Synthesis and Nitrogen Reduction
Swedish University of Agricultural Sciences
2017-2024
Science for Life Laboratory
2015-2024
Swedish Nuclear Fuel and Waste Management (Sweden)
2024
Uppsala University
2013-2022
University of Jyväskylä
2012-2019
University of Michigan–Ann Arbor
2013
Agrifood Research Finland
2006
Abstract Climate change and permafrost thaw are unlocking the vast storage of organic carbon held in northern frozen soils. Here, we evaluated effects thawing ice‐rich on dissolved matter (DOM) freshwaters by optical analysis 253 ponds across circumpolar North. For a subset waters subarctic Quebec, also quantified contribution terrestrial sources to DOM pool stable isotopes. The measurements showed higher proportion lower algal affected permafrost. composition was largely dominated (mean...
Abstract Although development of microbiota in childhood has been linked to chronic immune-related conditions, early determinants have not fully elucidated. We used 16S rRNA sequencing analyse faecal and saliva samples from 83 children at four time-points during their first 2 years life mothers. Our findings confirm that gut infants low diversity highlight some properties are shared with the oral microbiota, although inter-individual differences present. A considerable convergence...
The recognition and discrimination of phytoplankton species is one the foundations freshwater biodiversity research environmental monitoring. This step frequently a bottleneck in analytical chain from sampling to data analysis subsequent status evaluation. Here we present diversity 49 lakes including three seasonal surveys assessed by next generation sequencing (NGS) 16S ribosomal RNA chloroplast cyanobacterial gene amplicons also compare part these datasets with identification based on...
Although complex cooccurrence patterns have been described for microbes in natural communities, these scarcely interpreted the context of ecosystem functioning and stability. Here we constructed networks from species cooccurrences between pairs microorganisms which were extracted five individual aquatic time series, including a dystrophic eutrophic lake as well an open ocean site. The resulting exhibited higher clustering coefficients, shorter path lengths, average node degrees levels...
Abstract Stratified lakes and ponds featuring steep oxygen gradients are significant net sources of greenhouse gases hotspots in the carbon cycle. Despite their biogeochemical roles, microbial communities, especially depleted compartments, poorly known. Here, we present a comprehensive dataset including 267 shotgun metagenomes from 41 stratified mainly located boreal subarctic regions, but also one tropical reservoir temperate lake. For most ponds, data includes vertical sample set spanning...
Abstract The successful colonization of new habitats has played a fundamental role during the evolution life. Salinity is one strongest barriers for organisms to cross, which resulted in distinct marine and non-marine (including both freshwater soil) communities. Although microbes represent by far vast majority eukaryote diversity, salt barrier shaping diversity across eukaryotic tree poorly known. Traditional views suggest rare ancient marine/non-marine transitions but this view being...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 81:257-276 (2018) - DOI: https://doi.org/10.3354/ame01874 Gammaproteobacterial methanotrophs dominate methanotrophy in aerobic and anaerobic layers of boreal lake waters Antti J. Rissanen1,2,*, Jatta Saarenheimo2, Marja Tiirola2, Sari Peura3, Sanni L. Aalto2, Anu Karvinen4, Hannu Nykänen2,5 1Tampere University...
Despite the global awareness that mercury, and methylmercury in particular, is a neurotoxin to which millions of people continue be exposed, there are sizable gaps understanding processes organisms involved formation aquatic ecosystems. In present study, we shed light on diversity microorganisms responsible for boreal lake sediments. All identified associated with processing organic matter systems. Moreover, our results show well-known mercury-methylating sulfate-reducing bacteria...
In the subarctic region, climate warming and permafrost thaw are leading to emergence of ponds an increase in mobility catchment carbon. As carbon terrestrial origin is increasing freshwaters resource pool supporting their microbial communities metabolism changing, with consequences overall aquatic productivity. By sampling different water bodies for a one complete year we show how algal compounds vary range differential organic quality linked bacterial community composition. We that...
ABSTRACT The vertical structuring of methanotrophic communities and its genetic controllers remain understudied in the water columns oxygen-stratified lakes. Therefore, we used 16S rRNA gene sequencing to study stratification patterns methanotrophs two boreal lakes, Lake Kuivajärvi Lovojärvi. Furthermore, metagenomic analyses were performed assess genomic characteristics Lovojärvi previously studied Alinen Mustajärvi. methanotroph vertically structured along oxygen gradient....
Abstract Early life determinants of the oral microbiota have not been thoroughly elucidated. We studied association birth and early childhood characteristics with composition using 16 S ribosomal RNA (rRNA) gene sequencing in a population-based Swedish cohort 59 children sampled at 6, 12 24 months age. Repeated-measurement regression models adjusted for potential confounders confirmed expanded previous knowledge about profound shift life. These alterations included increased alpha diversity,...
High levels of nitrogen originating from blasting operations, for example at mining sites or quarries, risk contaminating water bodies through leaching waste rock dumps. Woodchip bioreactors can be a simple and cost-effective way reducing nitrate concentrations in the leachate. In this study we investigated how bottle sedge, barley straw, pine woodchips used as electron donors denitrification influenced microbial community composition removal lab-scale during 270 days. The reactors were...
Although sediments of small boreal humic lakes are important carbon stores and greenhouse gas sources, the composition structuring mechanisms their microbial communities have remained understudied. We analyzed vertical profiles biomass indicators (PLFAs, DNA RNA) bacterial archaeal community (sequencing 16S rRNA gene amplicons qPCR mcrA) in sediment cores collected from a typical lake. While decreased with depth, viable microbes (RNA PLFA) were present all through profiles. The...
Thousands of net-heterotrophic and strongly stratifying lakes dominate the boreal landscape. Besides their central role as emitters greenhouse gases, we have only recently begun to understand microbial systems driving metabolic processes elemental cycles in these lakes. Using shotgun metagenomics, show that functional potential differs among lake types, with humic being particularly enriched carbon degradation genes. Most pathways exhibit oxygen- temperature-dependent stratification over...
The role of anaerobic CH4 oxidation in controlling lake sediment emissions remains unclear. Therefore, we tested how relevant EAs (SO42-, NO3-, Fe3+, Mn4+, O2) affect production and the sediments two shallow boreal lakes. changes induced to microbial communities by addition Fe3+ Mn4+ were studied using next-generation sequencing targeting 16S rRNA methyl-coenzyme M reductase (mcrA) genes mcrA transcripts. Putative CH4-oxidizing archaea (ANME-2D) bacteria (NC 10) scarce (up 3.4% 0.5% archaeal...
Despite their key role in biogeochemical processes, particularly the methane cycle, archaea are widely underrepresented molecular surveys because of lower abundance compared with bacteria and eukaryotes. Here, we use parallel high-resolution small subunit rRNA gene sequencing to explore archaeal diversity 109 Swedish lakes correlate community assembly mechanisms large-scale latitudinal, climatic (nemoral arctic) nutrient (oligotrophic eutrophic) gradients. Sequencing universal primers showed...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 68:267-272 (2013) - DOI: https://doi.org/10.3354/ame01620 Green sulphur bacteria as a component of photosynthetic plankton community in small dimictic humic lakes with an anoxic hypolimnion Jatta Karhunen1,*, Lauri Arvola2, Sari Peura1,3, Marja Tiirola1 1Department Biological and Environmental Science, University...
Climate change scenarios anticipate decreased spring snow cover in boreal and subarctic regions. Forest lakes are abundant these regions substantial contributors of methane emissions. To investigate the effect reduced cover, we experimentally removed from an anoxic frozen lake. We observed that removal increased light penetration through ice, increasing water temperature modifying microbial composition different depths. Chlorophyll a b concentrations upper column, suggesting activation algal...
Abstract Inland waters receive and process large amounts of colored organic matter from the terrestrial surroundings. These inputs dramatically affect chemical, physical, biological properties water bodies, as well their roles global carbon sinks sources. However, manipulative studies, especially at ecosystem scale, require dissolved with optical chemical resembling indigenous matter. Here, we compared impacts two leonardite products (HuminFeed SuperHume) a freshly derived reverse osmosis...
Nutrient limitation and resource competition in bacterial phytoplankton communities may appear different when considering levels of taxonomic resolution. amendment experiments conducted a boreal lake on three occasions during one open water season revealed complex responses overall bacterioplankton abundance biovolume. In general, bacteria were dominant spring, while was clearly the predominant group autumn. Seasonal differences community composition mainly related to changes observed taxa,...