European Directory of Marine Environmental Data (EDMED)

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General
Data set name

Subsurface maxima of phytoplankton biomass in the Gulf of Finland: occurence, favourable conditions for formation and role

Data holding centreMarine Systems Institute at Tallinn University of Technology
CountryEstonia  Estonia
ProjectSubsurface maxima of phytoplankton biomass in the Gulf of Finland:occurance,favorable conditions for formation and role(ETF6955)
Time period01.01.2007 - 31.12.2010
OngoingYes
Geographical area

Tallinn-Helsinki transect; Tallinn-Lehtma transect;surveys near shallows Vinkov and Apollo

Observations 
Parameters

Primary production in the water column

Instruments

CTD; autoanalysers

Description 
Summary

The distribution of phytoplankton in water bodies (including the Baltic Sea) is highly heterogeneous, both horizontally and vertically. Typical vertical separation of resources in the stratified Gulf of Finland in summer - light that is supplied from above and nutrients that are supplied from below - could lead to the development of a subsurface maximum. Subsurface maxima contain fine-scale layers ranging in thickness from a few centimetres to a few metres (known as 'thin layers') where densities of organisms are far greater than those above or below the layer, and as a result, thin layers may play an important role in the marine ecosystems. Subsurface maxima are often dominated by potentially toxic species of phytoplankton. The main goal of the project is to estimate the extent of the phytoplankton/chlorophyll a subsurface maxima layers in the Gulf of Finland through hydrophysical, -chemical and -biological measurements and analysis of meteorological parameters, and to determine favourable conditions/processes for their formation and to estimate the role of these layers in the pelagic ecosystem. The results allow to understand better the functioning of pelagic ecosystem of the gulf and to give an answer whether and how the subsurface maxima have to be taken into account when assessing the state, modelling the ecosystem and forecasting harmful algae blooms.

OriginatorsMarine Systems Institute at Tallinn University of Technology
Availability 
OrganisationMarine Systems Institute at Tallinn University of Technology
AvailabilityUnknown
ContactUrmas Lips
Address

Marine Systems Institute at Tallinn University of Technology
MSI, Akadeemia tee 15a
Tallinn

12618
Estonia

Telephone+372 6204300
Emailmsi@msi.ttu.ee
Administration 
Collating centreMarine Systems Institute at Tallinn University of Technology
Local identifier48001012
Global identifier1139
Last revised2015-09-09