A5050213326- Microbial Community Ecology and Physiology
- Wastewater Treatment and Nitrogen Removal
- Soil Carbon and Nitrogen Dynamics
- Microbial bioremediation and biosurfactants
- Constructed Wetlands for Wastewater Treatment
- Mycorrhizal Fungi and Plant Interactions
- Climate change and permafrost
- Coastal wetland ecosystem dynamics
- Microbial Fuel Cells and Bioremediation
- Cryospheric studies and observations
- Marine Biology and Ecology Research
- Genomics and Phylogenetic Studies
- Soil and Water Nutrient Dynamics
- Ecology and Vegetation Dynamics Studies
- Atmospheric and Environmental Gas Dynamics
- Biofuel production and bioconversion
- Polar Research and Ecology
- Anaerobic Digestion and Biogas Production
- Methane Hydrates and Related Phenomena
- Agriculture, Soil, Plant Science
- Study of Mite Species
- Coal and Its By-products
- Geology and Paleoclimatology Research
- Ammonia Synthesis and Nitrogen Reduction
- Forest Ecology and Biodiversity Studies
Swedish University of Agricultural Sciences
2015-2024
University of Tartu
2005-2019
Abstract Arctic and alpine tundra ecosystems are large reservoirs of organic carbon 1,2 . Climate warming may stimulate ecosystem respiration release into the atmosphere 3,4 The magnitude persistency this stimulation environmental mechanisms that drive its variation remain uncertain 5–7 This hampers accuracy global land carbon–climate feedback projections 7,8 Here we synthesize 136 datasets from 56 open-top chamber in situ experiments located at 28 arctic sites which have been running for...
Ecosystems worldwide are facing habitat homogenization due to human activities. Although it is commonly proposed that such can have negative repercussions for ecosystem functioning, this question has yet receive explicit scientific attention. We expand on the framework evaluating functional consequences of biodiversity loss by scaling up from level species entire habitats. Just as diversity generally fosters functioning through positive interspecies interactions, we hypothesize different...
Abstract High-altitude and alpine areas are predicted to experience rapid substantial increases in future temperature, which may have serious impacts on soil carbon, nutrient fauna. Here we report the impact of 20 years experimental warming properties mites three contrasting plant communities alpine/subarctic Sweden. Long-term decreased juvenile oribatid mite density, but had no effect adult oribatids total any major group or most common species. also caused loss nitrogen, carbon moisture...
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...
Abstract Soil microbial diversity and community composition are shaped by various factors linked to land management, topographic position, vegetation. To study the effects of these drivers, we characterized fungal bacterial communities from bulk soil at four depths ranging surface below rooting zone two Swedish grasslands with differing land-use histories, each including both an upper a lower catenary position. We hypothesized that differences in plant species richness functional group...
Abstract Microbial community structure was assessed in a horizontal subsurface flow planted sand filter treating domestic wastewater with molecular and culture-based methods. The diversity spatial distribution of the microbial investigated using PCR–DGGE (eubacterial archaeal primers, ammonia-oxidizing bacteria, ammonium monooxygenase specific primers), spread plate MPN counts. Significant differences were found structure. Data analysis revealed that different components possessed patterns...
Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using selected bacterial strains as inoculum, biostimulation with molasses cabbage leaf extract, phytoremediation rye blue fenugreek to study the effect of these treatments on TNT removal changes in soil microbial community responsible contaminant degradation. Chemical analyses revealed...
A long-term field experiment was carried out to estimate the efficiency of bioaugmentation in combination with phytoremediation for oil shale chemical industry solid waste dump area remediation. Soil samples microbiological and analysis were collected during 3 years after bacterial biomass application. Microbial communities soil analysed using both culture-based molecular methods. The survival introduced strains confirmed by cultivation-based Box-PCR genomic fingerprints denaturing gradient...
Abstract There is a growing recognition that functional measures of diversity, based on quantification functionally important species traits, are useful for explaining variation in ecosystem processes. However, the mechanisms linking diversity to different processes remain poorly understood, hindering development predictive framework functioning traits. The current understanding how traits aquatic plants (macrophytes) affect nitrogen (N) cycling by regulating microbial communities and their...
Abstract Plant–microbial interactions in soils are considered to play a central role regulating biodiversity many global ecosystems. However, studies on plant–soil feedbacks (PSFs) and how these affect forest stand patterns boreal regions rare. We conducted fully reciprocal PSF glasshouse experiment using four tree species. Alnus glutinosa , Betula pendula Picea abies Pinus sylvestris seedlings were grown under controlled conditions sterilised soil with or without inoculum collected mature...
Oil‐shale chemical industry creates approximately 600 000 tons of thermally processed oil shale solid wastes (semi‐coke) every year in Estonia. A field phytoremediation and bioaugmentation experiment has been monitored for three years the waste depository area oil‐shale industry. We found enhanced degradation rates pollutants plots with vegetation added bacterial biomass. The concentration volatile phenols had decreased almost by 100 %, products 3 times planted compared to control plots....
Plasmids are mobile genetic elements that provide their hosts with many beneficial traits including in some cases the ability to degrade different aromatic compounds. To fulfill knowledge gap regarding catabolic plasmids of Baltic Sea water, a total 209 biodegrading bacterial strains were isolated and screened for presence these elements. We found both large small common cultivable bacterioplankton particularly prevalent among genera Pseudomonas Acinetobacter. Out 61 plasmid-containing (29%...
Global water supplies are threatened by climate changes and the expansion of urban areas, which have led to an increasing interest in nature-based solutions for reuse reclamation. Reclaimed is a possible resource recharging aquifers, addition organic reactive barrier has been proposed improve removal pollutants. There large focus on pollutants, but less known about multifunctional barriers, that is, how barriers also remove nutrients threaten groundwater ecosystems. Herein, we investigated...
Plant-soil feedback is increasingly recognized as a vital framework to analyze multi-trophic interactions involving herbivores, plants and microbes, but research still lacking on understanding such in the context of global change. In grasslands, patterns herbivory are expected be affected by change, further modifying existing plant-soil feedbacks. We tested this evaluating individual combined impacts aboveground generalist leaf-chewer nitrogen (N) eutrophication, simulating elevated N...
Vegetation change of the Arctic tundra due to global warming is a well-known process, but implication for belowground microbial communities, key in nutrient cycling and decomposition, poorly understood. We characterized fungal bacterial abundances litter soil layers across 16 experimental sites at 12 circumpolar locations. investigated relationship between nitrogen (N) carbon (C) isotopic signatures, indicating shifts processes with warming. Microbial were 2–3 orders magnitude larger than...