A5038916407- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Algal biology and biofuel production
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Water Quality Monitoring and Analysis
- Bioeconomy and Sustainability Development
- Diatoms and Algae Research
- Marine and fisheries research
- Wastewater Treatment and Nitrogen Removal
- Protist diversity and phylogeny
- Soil and Water Nutrient Dynamics
- Biofuel production and bioconversion
- Aquaculture Nutrition and Growth
- Microbial Metabolic Engineering and Bioproduction
- Fish Ecology and Management Studies
- Coastal and Marine Management
- Marine Toxins and Detection Methods
- Advanced Chemical Sensor Technologies
- Environmental Monitoring and Data Management
Finnish Environment Institute
2016-2025
University of Agder
2019-2025
Aalto University
2023
Kiel University
2022
Ullevål Sykehusapotek
2021
University of Helsinki
2006-2019
Helsinki Art Museum
2019
Abstract Macroalgae-based products are increasing in demand also Europe. In the European Union, each category of macroalgae-based is regulated separately. We discuss EU legislation, including law on medicinal products, foods food supplements and additives, feed cosmetics, packaging materials, fertilizers biostimulants, as well biofuels. Product safety consumer protection priorities with any new products. Macroalgae can be sold traditional herbal medicines. The novel regulation applies to...
Recirculating Aquaculture Systems (RAS) are becoming increasingly important as a sustainable method for fish production. However, further advancements needed to enhance the sustainability of RAS, particularly in management waste-streams. Furthermore, capital and operational expenditures running RAS is high, so solutions turning waste-streams into added value focus area industry moving forward. Wastewater high nitrogen, phosphorus (P) foreseen be limiting nutrient. Here we evaluated growth...
The algal spring bloom in the Baltic Sea represents an anomaly from winter-spring patterns worldwide terms of frequent and recurring dominance dinoflagellates over diatoms. Analysis approximately 3500 samples monitoring programs revealed (i) that within major basins proportion varied 0.1 (Kattegat) to >0.8 (central Proper), (ii) substantial shifts (e.g. 0.2 0.6 Gulf Finland) dinoflagellate four decades. During a recent decade (1995–2004) increased relative diatoms mostly northernmost (Gulf...
The Baltic Sea is affected by a range of human induced environmental pressures such as eutrophication. Here we synthesize the ongoing shift from diatom dominance towards more dinoflagellates in parts during spring bloom and its potential effects on biogeochemical cycling key elements (e.g. C, N P). period with highest annual primary production sinking organic matter to sediment. fate this driver for material fluxes, affecting ecosystem functioning eutrophication feedback loops. dominant...
Currently, very few studies address the relationship between diversity and biomass/lipid production in primary producer communities for biofuel production. Basic on growth of microalgal communities, however, provide evidence a positive biomass Recent have also shown that diversity-productivity relationships are related to an increase efficiency light use by diverse communities. Here, we hypothesize there is diversity, use, lipid phytoplankton Microalgae from all major freshwater algal groups...
Light (20-450 μmol photons m(-2) s(-1)), temperature (3-11 °C) and inorganic nutrient composition (nutrient replete N, P Si limitation) were manipulated to study their combined influence on growth, stoichiometry (C:N:P:Chl a) primary production of the cold water diatom Chaetoceros wighamii. During exponential maximum growth rate (~0.8 d(-1)) was observed at high light; 3 °C ~30% lower under similar light conditions. The interaction effect clearly visible from cellular stoichiometry. average...
Abstract. Eastern boundary upwelling systems (EBUS) are among the most productive marine ecosystems on Earth. The production of organic material is fueled by nutrient-rich deep waters and high incident light at sea surface. However, biotic abiotic factors can modify surface related biogeochemical processes. Determining these important because EBUS considered hotspots climate change, reliable predictions their future functioning requires understanding mechanisms driving cycles therein. In...
Abstract. The oceans absorb about a quarter of the annually produced anthropogenic atmospheric carbon dioxide (CO2), resulting in decrease surface water pH, process termed ocean acidification (OA). Surprisingly little is known how OA affects physiology heterotrophic bacteria or coupling to phytoplankton when nutrients are limited. Previous experiments were, for most part, undertaken during productive phases following nutrient additions designed stimulate algal blooms. Therefore, we performed...
Spring bloom composition in the Baltic Sea, a partially ice‐covered brackish coastal waterbody, is shaped by winter‐spring weather conditions affecting relative dominance of diatoms and heterogeneous assemblage cold‐water dinoflagellates, dominated chain‐forming Peridiniella catenata complex at least three medium‐sized, single‐celled species: Biecheleria baltica, Gymnodinium corollarium, Scrippsiella hangoei . During last decades, community has dramatically changed several basins. We analyze...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 81:149-170 (2018) - DOI: https://doi.org/10.3354/ame01868 Shifts in phytoplankton community structure modify bacterial production, abundance and composition Maria T. Camarena-Gómez1,2,*, Tobias Lipsewers2, Jonna Piiparinen2, Eeva Eronen-Rasimus2, Daniel Perez-Quemaliños3, Laura Hoikkala2,4, Cristina Sobrino3, Kristian...
Abstract High inputs of nutrients and organic matter make coastal seas places intense air‐sea CO 2 exchange. Due to their complexity, the role in global exchange is, however, still uncertain. Here, we investigate phytoplankton stoichiometric flexibility extracellular DOC production for seasonal nutrient partial pressure (pCO ) dynamics Gulf Bothnia, Northern Baltic Sea. A 3‐D ocean biogeochemical‐physical model with variable stoichiometry is first time implemented area validated against...
Reduction of anthropogenic CO 2 emissions alone will not sufficiently restrict global warming and enable the 1.5°C goal Paris agreement to be met. To effectively counteract climate change, measures actively remove carbon dioxide from atmosphere are required. Artificial upwelling has been proposed as one such removal technique. By fueling primary productivity in surface ocean with nutrient-rich deep water, it could potentially enhance downward fluxes particulate organic (POC) sequestration....
Abstract. Ocean alkalinity enhancement (OAE) has been proposed as a carbon dioxide removal technology (CDR), allowing for long-term storage of in the ocean. By changing carbonate speciation seawater, OAE may potentially alter marine ecosystems with implications biological pump. Using mesocosms subtropical North Atlantic, we provide first empirical insights into impacts carbonate-based on vertical flux and attenuation sinking particles an oligotrophic plankton community. We enhanced total...
Rapid and drastic anthropogenic impacts are affecting global biogeochemical processes driving biodiversity loss across Earth's ecosystems. In aquatic ecosystems, species distributions shifting, abundances of many have declined dramatically, threatened with extinction. addition to diversity, the ecosystem functions, services on which humans depend also being heavily impacted. Addressing these challenges not only requires direct action mitigate environmental but innovative approaches identify,...
Abstract Eutrophication in the Baltic Sea has caused an imbalance inorganic nitrogen (N) to phosphorus (P) ratio, leaving excess phosphate (PO 4 ) after phytoplankton spring bloom that terminates N depletion. Using monitoring data, we demonstrated PO concentration continued increase outermost Gulf of Finland during past decades. We further investigated fate such a two‐week mesocosm (1.2 m 3 experiment. The starting was 0.66 μ M, and treatments included non‐treated control (control), nitrate...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 50:181-196 (2008) - DOI: https://doi.org/10.3354/ame01163 Dinoflagellate bloom formation in natural assemblages with diatoms: nutrient competition and growth strategies Baltic spring phytoplankton Anke Kremp1,*, Timo Tamminen2, Kristian Spilling2 1Tvärminne Zoological Station, University of Helsinki, 10900 Hanko, Finland...
Optical-biogeochemical relationships of particulate and dissolved organic matter are presented in support remote sensing the Baltic Sea pelagic. This system exhibits strong seasonality phytoplankton community composition wide gradients chromophoric (CDOM), properties which poorly handled by existing algorithms. Absorption scattering reflected biological (phytoplankton succession) physical (thermal stratification) processes. Inherent optical showed much wider variability when normalized to...
Abstract. Diatoms and dinoflagellates are major bloom-forming phytoplankton groups competing for resources in the oceans coastal seas. Recent evidence suggests that their competition is significantly affected by climatic factors under ongoing change, modifying especially conditions cold-water, spring bloom communities temperate Arctic regions. We investigated effects of community composition on carbon flows nutrient stoichiometry multiyear mesocosm experiments. Comparison differing showed...