A5062885395- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Ocean Acidification Effects and Responses
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Mercury impact and mitigation studies
- Environmental Toxicology and Ecotoxicology
- Microplastics and Plastic Pollution
- Marine and coastal plant biology
- Marine Biology and Environmental Chemistry
- Marine Toxins and Detection Methods
- Toxic Organic Pollutants Impact
- Marine and environmental studies
- Protist diversity and phylogeny
- Fish Ecology and Management Studies
- Algal biology and biofuel production
- Coastal and Marine Management
- Aquaculture Nutrition and Growth
- Methane Hydrates and Related Phenomena
- Arctic and Russian Policy Studies
- Heavy metals in environment
- Water-Energy-Food Nexus Studies
Technical University of Denmark
2013-2024
Danish Centre for Marine Research
2005-2014
Institute of Fisheries and Aquaculture
2007
Royal Netherlands Institute for Sea Research
1998-2003
University of Helsinki
1995-2002
Paul Scherrer Institute
1999
Tyre wear particles (TWP) are some of the dominant sources microplastics in aquatic environment. Once TWP enter systems, they can leach certain plastic additives that be potentially toxic to biota. However, little is known about impact lixiviates on marine phytoplankton, base food webs. This study aims determine acute effect leachates derived from three phytoplankton species: cryptophyte Rhodomonas salina, diatom Thalassiosira weissflogii and dinoflagellate Heterocapsa steinii, using median...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 170:169-187 (1998) - doi:10.3354/meps170169 Effect of food quality on rate growth and development pelagic copepod Pseudocalanus elongatus (Copepoda, Calanoida) Marja Koski*, Wim Klein Breteler, Nelleke Schogt Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg, Texel, The *Present address:...
Production, oxygen uptake, and sinking velocity of copepod fecal pellets egested by Temora longicornis were measured using a nanoflagellate ( Rhodomonas sp.), diatom Thalassiosira weissflogii ), or coccolithophorid Emiliania huxleyi ) as food sources. Fecal pellet production varied between 0.8 ind −1 h 3.8 was significantly higher with T. than the other Average size 2.2 ×10 5 µm 3 10.0 . Using an microsensor, small‐scale fluxes microbial respiration rates directly spatial...
We investigated whether reduced reproductive success of copepods fed with diatoms was related to nutritional imbalances regard essential lipids or the production inhibitory aldehydes. In 10‐d laboratory experiments, feeding, egg production, hatching success, and fecal pellet Temora longicornis were measured for six different diatom species as well a nondiatom control diet ( Rhodomonas sp.). The experiments accompanied by determinations fatty acids, sterols, polyunsaturated aldehydes (PUA) in...
With thousands of tons Tyre Wear Particles (TWP) entering the aquatic environment every year, TWP are considered a major contributor to microplastic pollution. leach organic compounds and metals in water, potentially affecting marine food web. However, little is known about toxicity leachates on copepods, web constituent, key group determine environmental risk pollution ecosystems. In this study, we determined lethal effect copepods after 24, 48, 72-h exposure 0.05–100% leachate solutions...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 186:187-197 (1999) - doi:10.3354/meps186187 Reproduction and survival of calanoid copepod Eurytemora affinis fed with toxic non-toxic cyanobacteria M. Koski*, J. Engström, Viitasalo Tvärminne Zoological Station, 10900 Hanko, Finland *Present address: Department Systematics, Division Hydrobiology, University...
We measured ingestion and clearance rates of two Baltic Sea calanoid copepods, Eurytemora affinis Acartia bifilosa, on toxic non-toxic cyanobacteria Nodularia sp. using the isotope technique. fed actively strain moderately strain, whereas A.bifilosa totally avoided feeding both strains. This suggests that rejected cyanobacterial filaments due to their nutritional inadequacy or difficult manageability. The different response E.affinis strains, in turn, shows this copepod species was able...
MEPS Marine Ecology Progress Series Contact the journal Facebook (Twitter) RSS Mailing List Receive regular lists of newly published articles via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 274:199-208 (2004) - doi:10.3354/meps274199 Role essential lipids in copepod nutrition: no evidence for trophic upgrading food quality by a marine ciliate W. C. M. Klein Breteler1,*, Koski1,2, S. Rampen1 1Royal Netherlands Institute Sea Research (NIOZ), PO Box 59, 1790 AB, Den Burg, The...
Zooplankton and microbes play a key role in the ocean's biological cycles by releasing consuming copious amounts of particulate dissolved organic matter. Additionally, zooplankton provide complex microhabitat rich inorganic nutrients which bacteria thrive. In this study, we assessed phylogenetic composition metabolic potential microbial communities associated with crustacean species collected North Atlantic. Using Illumina sequencing 16S rRNA gene, found significant differences between those...
The sustainability of recycling aquaculture systems (RAS) is challenged by nutrient discharges, which cause water eutrophication. Efficient treatments for RAS effluents are needed to mitigate its environmental impacts. Microalgae assimilate nutrients and dissolved carbon into microbial biomass with value as feed or food ingredient. However, they difficult harvest efficiently. Daphnia magna an efficient filter feeder that grazes on microalgae at high rates serves valuable fish feed. Combining...
Feeding and fecundity of two calanoid copepod species ( Acartia bifilosa Eurytemora affinis ) were studied in a food assemblage dominated by toxic cyanobacteria, to reveal whether mesozooplankton are able obtain sufficient good quality different phases cyanobacteria bloom. Bloom conditions simulated mesocosm adding high concentration cultured hepatotoxic Nodularia spumigena 100 mm filtered natural sea water. This seston was fed copepods at days 1, 7, 14 from the start experiment, when it...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 249:237-249 (2003) - doi:10.3354/meps249237 Feeding, reproduction and toxin accumulation by copepods Acartia bifilosa Eurytemora affinis in presence of toxic cyanobacterium Nodularia spumigena Betina Kozlowsky-Suzuki1,4,*, Miina Karjalainen2, Maiju Lehtiniemi2, Jonna Engström-Öst2, Marja Koski3,5, Per...
We measured field abundances, feeding rates, swimming behavior, and particle colonization of two harpacticoids, the pelagic Microsetella norvegica semibenthic Amonardia normanni, to examine (1) if aggregates have a significant role in harpacticoid nutrition (2) harpacticoids contribute significantly aggregate degradation. Neither was able feed efficiently on suspended food, while both grazed well attached indicating that depend food surfaces, such as those offered by marine aggregates....
Copepods are major consumers of sinking marine particles and hence reduce the efficiency biological carbon pump. Their high abundance on snow suggests that they can detect remotely. By means laboratory observations, we show copepod Temora longicornis chemical trails originating from (appendicularian houses). The cue was detected by copepods a distance >25 particle radii, with probability detection decreasing distance. behavior T. following trail resembled males tracking pheromone trails,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 163:133-143 (1998) - doi:10.3354/meps163133 Seasonal occurrence and hatching of calanoid eggs in sediments northern Baltic Sea Tarja Katajisto1,2,*, Markku Viitasalo2,3, Marja Koski2,3 1Finnish Institute Research, PO Box 33, FIN-00931 Helsinki, Finland 2Tvärminne Zoological Station, FIN-10900 Hanko,...
We investigated the sedimentation of copepod fecal pellets in three different sea areas representing a sheltered bay, an archipelago area, and open on southwestern coast Finland northern Baltic Sea. Fecal carbon was always <0.05% total particulate organic carbon, whereas production (estimated from abundance, assuming rate 10 −1 d ) contributed to 4–17% sedimentation. Thus, >99% material remineralized within mixed water layer (0–20 m). However, area season dominated by large calanoid...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 232:1-14 (2002) - doi:10.3354/meps232001 Effects of toxic cyanobacteria on a plankton assemblage: community development during decay Nodularia spumigena Jonna Engström-Öst1,2,*, Marja Koski2,3,**, Katrin Schmidt4, Markku Viitasalo1, Sigrún H. Jónasdóttir5, Marjaana Kokkonen3, Sari Repka6, Kaarina Sivonen6...
Despite the potential importance of zooplankton in degradation marine snow, association colonising with discarded appendicularian houses has not been investigated northern areas. We sampled vertical distributions appendicularians, and colonisers at two stations central North Sea during late summer. In addition, grazing experiments were performed copepod Microsetella norvegica, which was assumed to be main contributor house degradation. The results used (i) inverse modelling, estimate factors...