European Directory of Marine Environmental Data (EDMED)

Data set information

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General
Data set name

Sulphide and methane based ecosystems (1990 -1992)

Data holding centreHellenic Centre for Marine Research, Institute of Oceanography (HCMR/IO)
CountryGreece  Greece
Time periodAugust 1990, May and July 1991, March and June 1992
OngoingNo
Geographical area

Aegean Sea: Methana, Nisyros, Milos, Santorini. North Sea: Geoteam and Northwest Pockmarks of the northern North Sea Western Skagerrak

Observations 
Parameters

Chlorophyll pigment concentrations in sediment; Sediment grain size parameters; Concentration of proteins in the water column; Zoobenthos taxonomic abundance; Zoobenthos taxonomy-related wet weight biomass per unit area of the bed; Concentration of proteins in sediment

Instruments

Sediment grabs; unconsolidated sediment corers

Description 
Summary

This theme is concerned with the environmental effects of fluid seepage through the seafloor and the ecosystems and macrofauna found in these areas. The project has led to the major discovery of shallow water hot brine seeps and gaseohydrothermal vents along the Hellenic Volcanic Arc, covering extensive areas overlain by bacterial mats. The studies revealed unexpectedly enhanced biodiversity and productivity in the hydrothermal vent ecosystems of the Aegean Sea. The studies in the gas-charged sediments of the western Skagerrak along the Hellenic Volcanic Arc provided evidence for a localised effect of the seeps on the distribution of the infauna.

OriginatorsHellenic Centre for Marine Research, Institute of Marine Biology, Biotechnology & Aquaculture (HCMR/IMBBC)
Availability 
OrganisationHellenic Centre for Marine Research, Institute of Oceanography (HCMR/IO)
AvailabilityBy negotiation
ContactDr I. Akoumianaki
Address

Hellenic Centre for Marine Research, Institute of Oceanography (HCMR/IO)
46.7 km Athinon-Souniou Av. P.O.Box 712
Anavyssos

19013
Greece

Telephone+30-22910-76452
Facsimile+30-22910-76347
Emailvlikou@hcmr.gr
Administration 
Collating centreHellenic Centre for Marine Research, Hellenic National Oceanographic Data Centre (HCMR/HNODC)
Local identifier6010026
Global identifier1260
Last revised2015-07-07