Emil Nyman

Emil Nyman
City of Helsinki · Environment Centre

PhD Hydrobiology

About

26
Publications
11,988
Reads
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1,306
Citations
Citations since 2017
4 Research Items
707 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Introduction
I currently work with coordinating the monitoring and research of the sea area of Helsinki, responsible for monitoring of effects of waste water discharges, dredging, cooling water effluents etc. I participate in a variety of research efforts aiming mainly at improving current monitoring methods and actively work with coupled physical-biological modelling of the sea.
Additional affiliations
March 2009 - February 2011
Woods Hole Oceanographic Institution
Position
  • PostDoc Position
Description
  • Studying the cyst dynamics and in situ benthic cell emergence of Alexandrium fundyense
Education
January 2004 - January 2008
University of Helsinki
Field of study
  • Hydrobiology
January 1998 - December 2002
University of Turku
Field of study
  • Ecology

Publications

Publications (26)
Technical Report
Full-text available
Results of the physical, chemical, hygienic and biological monitoring programme of the Helsinki metropolitan coastal sea area.
Article
Full-text available
Resistant to degradation, plastic litter poses a long-term threat to marine ecosystems. Biodegradable materials have been developed to replace conventional plastics, but little is known of their impacts and degradation in marine environments. A 14-week laboratory experiment was conducted to investigate the sorption of polycyclic aromatic hydrocarbo...
Technical Report
Full-text available
Summary in English, report in Finnsih. Results of the physical, chemical, hygienic and biological monitoring of the Helsinki metropolitan coastal sea area.
Technical Report
Full-text available
Typical sea water temperatures in the coastal sea outside Helsinki (engllish summary, report in Finnsih)
Technical Report
Full-text available
An assessment of the ecological status of the coastal waters of the Helsinki metropolitan area show that for the period 2012-2015 the status varies from the bad state of the Seurasaari water area to the poor states of the Kruunuvuorenselkä, Villinki and Sipoon saaristo water areas and finally to the moderate state of the Suvisaaristo-Lauttasaari wa...
Technical Report
Full-text available
The monitoring of the water quality and aquatic environment in the Helsinki metropolitan region was renewed in 2014 when a new joint monitoring program was started. An agreement was signed by the Helsinki Region Environmental Services Authority (HSY), Port of Helsinki, Helsingin Energia (Helen Oy since 2015), Espoo Technical Services and Arctech He...
Article
Full-text available
This study on the removal of microplastics during different wastewater treatment unit processes was carried out at Viikinmäki wastewater treatment plant (WWTP). The amount of microplastics in the influent was high, but it decreased significantly during the treatment process. The major part of the fibres were removed already in primary sedimentation...
Technical Report
Full-text available
The sea area outside the Helsinki metropolitan area has received large external nutrient loads for decades, both from municipal waste waters and diffuse loads. Nutrient loading has led to eutrophication of the coastal sea, which again has led to dead bottoms and anoxia or hypoxia in near bottom waters. As the external loads have diminished and the...
Technical Report
Full-text available
Helsingissä keskeisellä paikalla sijaitseva Töölönlahti on aikoinaan raskaan jätevesikuormituksen jäljiltä edelleen voimakkaasti rehevöitynyt. Vuoden 2005 lopulla alettiin Töölönlahdelle johtaa vettä Humallahdelta tarkoituksena parantaa veden laatua. Vettä on johdettu avovesiaikaan 0,5 m3 s-1, jolloin veden vaihtuvuutta on saatu tehostettua huomatt...
Technical Report
Full-text available
Helsingin ja Espoon sekä eräiden Keski-Uudenmaan kuntien jätevedet käsiteltiin vuonna 2013 Helsingin Viikinmäen ja Espoon Suomenojan jätevedenpuhdistamoissa. Viikinmäen puhdistamolta puhdistetut jätevedet johdettiin tunnelissa Katajaluodon eteläpuolelle ja Suomenojan puhdistamolta Gåsgrundet-saaren kaakkoispuolelle. Viikinmäen ja Suomenojan puhdist...
Article
Full-text available
Both observations and models suggest that large-scale coastal blooms of Alexandrium fundyense in the Gulf of Maine are seeded by deep-bottom cyst accumulation zones (“seed beds”) where cysts germinate from the sediment surface or the overlying near-bottom nepheloid layers at water depths exceeding 100 m. The germling cells and their vegetative prog...
Technical Report
Full-text available
Helsingin ja Espoon sekä eräiden Keski-Uudenmaan kuntien jätevedet käsiteltiin vuonna 2012 Helsingin Viikinmäen ja Espoon Suomenojan jätevedenpuhdistamoissa. Viikinmäen puhdistamolta puhdistetut jätevedet johdettiin tunnelissa Katajaluodon eteläpuolelle ja Suomenojan puhdistamolta Gåsgrundet-saaren kaakkoispuolelle. Viikinmäen ja Suomenojan puhdist...
Article
Full-text available
The effect of single nutrient additions (ammonia or phosphate) on the biomass and phosphorus dynamics of natural Baltic Sea phytoplankton bloom communities dominated by nitrogen-fixing Cyanobacteria was studied. The aim was to elucidate bloom-time phosphorus deficiency characteristics of the community. In addition, the intention was to study the ef...
Article
Full-text available
Numerical simulation experiments with an eddy-resolving ocean circulation model were performed to study nutrient transport to the surface layer by summer upwelling events in the Gulf of Finland. It is shown that upwelling along the southern coast of the Gulf, produced by easterly winds, brings more nutrients to the surface layer than upwelling alon...
Article
Full-text available
A high resolution numerical study is undertaken to simulate an upwelling event along the northern coast of the Gulf of Finland, 21-29 July 1999, which was documented well by in situ and remote measurements. The simulated sequence of SST maps shows a reasonably good resemblance to that of satellite infrared imagery, including both mesoscale coherent...
Article
Full-text available
The Baltic Sea Science Congress was held at Rostock University, Germany, from 19 to 22 March 2007. In the session entitled"Upwelling events, coastal offshore exchange, links to biogeochemical processes" 20 presentations were given,including 7 talks and 13 posters related to the theme of the session.This paper summarises new findings of the upwellin...
Article
Full-text available
The Baltic Sea Science Congress was held at Rostock University, Germany, from 19 to 22 March 2007. In the session entitled "Upwelling events, coastal offshore exchange, links to biogeochemical processes" 20 presentations were given, including 7 talks and 13 posters related to the theme of the session. This paper summarises new findings of the upwel...
Article
Full-text available
Eutrophication of the Baltic Sea has potentially increased the frequency and magnitude of cyanobacteria blooms. Eutrophication leads to increased sedimentation of organic material, increasing the extent of anoxic bottoms and subsequently increasing the internal phosphorus loading. In addition, the hypoxic water volume displays a negative relationsh...
Article
Full-text available
A laboratory experiment was conducted to study differences in the use of varying phosphorus sources by the bloom-forming filamentous cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena. Axenic strains were grown in typical bloom-time light regimes under phosphate-replete, added organic phosphorus phosphate-depleted and completely phospho...
Article
Full-text available
Fuzzy logic was applied to model blooms of Nodularia spumigena, Dinophysis spp., Alexandrium minutum, Karenia mikimotoi and Phaeocystis globosa at various European sites as part of the Harmful Algal Blooms Expert System (HABES) project. This modelling approach was useful in performing integrated analyses of interacting physical and biological facto...
Article
Full-text available
A fuzzy logic model to describe the seasonal evolution of Nodularia spumigena blooms in the Gulf of Finland was built and calibrated on the basis of monitoring data. The model includes three phosphate sources: excess phosphate after the annual spring bloom and parameterised phosphate transport to the upper mixed layer by turbulent mixing and upwell...
Article
The effect of coastal upwelling on the late summer pelagic environment, focusing on the two main bloom-forming filamentous cyanobacteria species, Aphanizomenon flos-aquae and Nodularia spumigena, was evaluated on the basis of field observations in July and August 1999 in the western Gulf of Finland. The study consisted of biological (chlorophyll a,...
Article
Full-text available
Eutrophication favours harmful algal blooms worldwide. The blooms cause toxic outbreaks and deteriorated recreational and aesthetic values, causing both economic loss and illness or death of humans and animals. The Baltic Sea is the world s only large brackish water habitat with recurrent blooms of toxic cyanobacteria capable of biological fixation...

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