A5032333213- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Algal biology and biofuel production
- Aquatic Ecosystems and Phytoplankton Dynamics
- Water Quality Monitoring and Analysis
- Spectroscopy and Chemometric Analyses
- Spectroscopy Techniques in Biomedical and Chemical Research
- Microplastics and Plastic Pollution
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Recycling and Waste Management Techniques
- Geology and Paleoclimatology Research
- Biocrusts and Microbial Ecology
- Diatoms and Algae Research
- Environmental DNA in Biodiversity Studies
- Aquatic and Environmental Studies
- Food Industry and Aquatic Biology
- Nutritional Studies and Diet
- Aquatic Invertebrate Ecology and Behavior
- Marine Bivalve and Aquaculture Studies
- Protist diversity and phylogeny
- Aquatic Ecosystems and Biodiversity
- Freshwater macroinvertebrate diversity and ecology
- Biosensors and Analytical Detection
- Marine and coastal plant biology
University of Jyväskylä
2015-2025
Information Technology University
2025
Spectral Imaging Laboratory (United States)
2021
University of Helsinki
2014
LAM Foundation
2010
Abstract To determine the drivers of phytoplankton biomass, we collected standardized morphometric, physical, and biological data in 230 lakes across Mediterranean, Continental, Boreal climatic zones European continent. Multilinear regression models tested on this snapshot mostly eutrophic (median total phosphorus [TP] = 0.06 nitrogen [TN] 0.7 mg L −1 ), its subsets (2 depth types 3 zones), show that light climate stratification strength were most significant explanatory variables for...
Phytoplankton is the basis for aquatic food webs and mirrors water quality. Conventionally, phytoplankton analysis has been done using time consuming partly subjective microscopic observations, but next generation sequencing (NGS) technologies provide promising potential rapid automated examination of environmental samples. Because many species have tough cell walls, methods lysis DNA or RNA isolation need to be efficient allow unbiased nucleic acid retrieval. Here, we analyzed how two...
Abstract Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers numerous services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution climate-change induced stressors, like poor transparency, increased water temperature enhanced stratification....
Abstract Microplastics (MPs) from households, stormwater, and various industries are transported to wastewater treatment plants (WWTPs), where a high proportion of them captured before discharging their residuals watersheds. Although recent studies have indicated that the removed MPs mainly retained in sludge, sludge processes gained less attention MP research than water streams at primary, secondary, tertiary treatments. In this study, we sampled 12 different process steps tertiary-level...
Abstract Light availability is the main regulator of primary production, shaping photosynthetic communities and their production ecologically important biomolecules. In freshwater ecosystems, increasing dissolved organic carbon (DOC) concentrations, commonly known as browning, leads to lower light proliferation mixotrophic phytoplankton. Here, a algal species ( Cryptomonas sp.) was grown under five DOC concentrations uncover plastic responses behind success mixotrophs in browning...
The development of phytoplankton biomass and composition in a eutrophic boreal lake was studied during the evolution under-ice convection spring. results from 8 yr showed that, within few weeks before ice-break, regularly increased by up to two or three orders magnitude, reaching exceeding summer. Accordingly, this may be most significant single annual episode lake. closely coupled with that created solar radiation at water temperatures < 4°C. In addition vertical which keeps suspended,...
Chemotaxonomic biomarkers are needed to monitor and evaluate the nutritional quality of phytoplankton communities. The biomolecules produced by different species do not always follow genetic phylogeny. Therefore, we analyzed fatty acids, sterols, carotenoids from 57 freshwater strains usability these as chemotaxonomic biomarkers. We found 29 34 26 in our samples. were grouped into cryptomonads, cyanobacteria, diatoms, dinoflagellates, golden algae, green raphidophytes, group explained 61%,...
Abstract High expectations are placed on microalgae as a sustainable source of valuable biomolecules. Robust methods to control cultivation processes needed enhance their efficiency and, thereafter, increase the profitability microalgae-based products. To meet this need, non-invasive monitoring method based hyperspectral imager was developed for laboratory scale and afterwards tested industrial cultivations. In experiments, reference data microalgal biomass concentration gathered construct...
The design of photobioreactors for microalgae cultivation aims to achieve an architecture that allows the most efficient photosynthetic growth. availability light at wavelengths are important photosynthesis is therefore particularly crucial reactor design. While testing different types in practice expensive, simulations could effectively limit range material and options. In this study, procedural three-dimensional modelling together with ray tracing was used create virtual models a...
Abstract Hyperspectral sensing of phytoplankton, free-living microscopic photosynthetic organisms, offers a comprehensive and scalable method for assessing water quality monitoring changes in aquatic ecosystems. However, unmixing the intrinsic optical properties phytoplankton from hyperspectral data is complex challenge. This research addresses problem non-linear absorbance concentrated samples using Blind (BAE) Endmember Guided Autoencoder (EGAE). We show that spectral EGAE model with...
A small range (∼ 1°C) of under‐ice water temperature is shown to result in remarkably different circulation regimes under spring ice a deep, oligotrophic boreal lake. With the column at < 4°C, melting snow led deepening vertical convection before break and final depth inversely correlated with earlier deep‐water temperature. We attribute that nonlinear dependence density on temperature, albeit further affected by stochastic weather factors. In four nine study years, complete overturn...
Phytoplankton synthesizes essential ω-3 and ω-6 polyunsaturated fatty acids (PUFA) for consumers in the aquatic food webs. Only certain phytoplankton taxa can synthesize eicosapentaenoic (EPA; 20:5ω3) docosahexaenoic acid (DHA; 22:6ω3), whereas all shorter-chain PUFA. Here, we experimentally studied how proportion, concentration (per DW cell-specific), production (µg FA L-1 day-1) of PUFA varied among six different main groups (16 freshwater strains) between exponential stationary growth...
Abstract Effective monitoring of microalgae growth is crucial for environmental observation, while the applications this could also be expanded to commercial and research-focused cultivation. Currently, distinctive optical properties different groups are targeted monitoring. Since can grow together, their spectral signals mixed with ambient properties, making estimations species biomasses a challenging task. In study, we cultured five monitored mobile imager in three separate experiments. We...
Abstract Temperature increases driven by climate change are expected to decrease the availability of polyunsaturated fatty acids in lakes worldwide. Nevertheless, a comprehensive understanding joint effects lake trophic status, nutrient dynamics and warming on these biomolecules is lacking. Here, we conducted laboratory experiment study how (18–23°C) interacts with phosphorus (0.65–2.58 μM) affect phytoplankton growth their production acids. We included 10 species belonging groups diatoms,...
Eutrophication, i.e. increasing level of nutrients and primary production, is a central environmental change lakes globally with wide effects on food webs. However, how eutrophication affects the synthesis physiologically essential biomolecules (omega-3 fatty acids) their transfer to higher trophic levels at whole web not well understood. We assessed (phytoplankton, zooplankton, fish) biomass, community structure acid content (eicosapentaenoic [EPA], docosahexaenoic [DHA]), together specific...
To mitigate deep water oxygen depletion and its consequences, epilimnetic was pumped into of a eutrophic, 26 km2 subbasin Lake Vesijärvi, Finland. In winter, the mechanical mixing largely eliminated vertical differences in temperature, oxygen, nutrients. Although ice cover prevented flux from atmosphere, high proportion shallows basin with concentration facilitated avoidance hypoxia by mixing. Despite disappearance anoxia water, volume-weighted mean concentrations nutrients were not...
Spectral cameras are traditionally used in remote sensing of microalgae, but increasingly also laboratory-scale applications, to study and monitor algae biomass cultures. Practical cost-efficient protocols for collecting analyzing hyperspectral data currently needed. The purpose this was test a commercial, easy-to-use camera the growth different strains liquid samples. Indices calculated from wavebands transmission imaging were compared against abundance wet obtained an electronic cell...
The composition of phytoplankton community is the basis for environmental monitoring and assessment ecological status aquatic ecosystems. Community studies have been based on time-consuming expertise-demanding light microscopy analyses. Molecular methods potential to replace microscopy, but high copy number variation ribosomal genes lack universal primers simultaneous amplification prokaryotic eukaryotic complicate data interpretation. In this study, we used our previously developed...
Abstract Organic matter (OM) other than living phytoplankton is known to affect fluorometric in situ assessments of chlorophyll lakes. For this reason, calibrating measurements for OM error important. In study, (Chl) fluorescence was measured multiple Finnish lakes using two sondes equipped with Chl fluorometers (ex.470/em.650–700 nm). absorbance (A 420 ) from water samples, and one the also fluorometer (ex.350/em.430 The sonde deployed continuously on an automated quality monitoring station...
The abundance of microplastics (MPs) in the atmosphere, on land, and especially water bodies is well acknowledged. In this study, we establish an optical method based three different techniques, namely, specular reflection to probe medium, transmission spectroscopy measurements for detection identification, a speckle pattern monitoring sedimentation MPs filtrated from wastewater sludge suspended ethanol. We used first Raman estimate presence types samples. also microscopy identify shapes...
We studied the development of autotrophic picophytoplankton and heterotrophic bacterioplankton during transition from winter ice cover to open water under natural manipulated mixing conditions in eutrophic Lake Vesijärvi. During melting snow cover, a convection layer developed which eventually met chemocline at interface between oxic anoxic masses. However, years with mechanically enhanced mixing, whole column remained well oxygenated deepening penetrative was facilitated. Stochastic...
Abstract Motivated by the need for rapid and robust monitoring of phytoplankton in inland waters, this article introduces a protocol based on mobile spectral imager assessing pigments from water samples. The includes (1) sample concentrating; (2) imaging; (3) convolutional neural networks (CNNs) to resolve concentrations chlorophyll (Chl ), carotenoids, phycocyanin. was demonstrated with samples 20 lakes across Scotland, special emphasis Loch Leven where blooms cyanobacteria are frequent. In...