CEFASd4368bcc-2ab3-49c3-ab6d-9a60d85c5fc5
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2021-12-13T10:50:55
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
2007 - 2008 Centre for Environment, Fisheries & Aquaculture Science (Cefas) North Sea Organic Carbon and Nitrogen in Sediments
sediment carbon and nitrogen
2021-12-13
publication
CEFASd4368bcc-2ab3-49c3-ab6d-9a60d85c5fc5
http://www.cefas.co.uk/
Concentration of organic carbon and organic nitrogen from CHN analysis of
sediment samples collected by box core from North Sea sites at North Dogger
Bank, Oyster Ground and Sean Gasfield throughout various cruises in 2007-2008,
with associated summary PSA data (%gravel, %sand, %mud). Cores were sliced and
sampled at a range of depth horizons and the data compiled to provide average
values for the 0-5 cm and 5-10cm depth layers. These have been used to
summarise profiles and describe spatial variance within four Ecohydrodynamic
Units (EHUs).
notPlanned
Delimited
NDGO0005
Carbon concentrations in sediment
Carbon, nitrogen and phosphorus
Nitrogen concentrations in sediment
Rock and sediment chemistry
SeaDataNet P021 parameter discovery vocabulary
2011-03-25
revision
Biochemistry
Advice
Analysis
Management
Monitoring
Sea bed
Sediment
GEMET, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
English
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Sediment
2
5
53
55.75
2007-01-01
2008-12-31
dataset
Samples were screened at 2mm and the <2mm fraction was then freeze dried, homogenised, and treated with
sulphurous acid to remove inorganic carbon (carbonates). Organic carbon was determined by flash
combustion. Organic carbon levels in the sediment indicate the amount of organic matter supplied to the
bed and how rapidly it is decomposed, i.e. it reflects the balance between input and respiration/burial.
Organic carbon content of sediments is also related to eutrophication and biodiversity due to the
relationship between the recycling of organic matter and the availability of oxygen.
Records include data from Defra funded project ME3205 entitled "Marine Ecosystem Connections: carbon and
nitrogen fluxes through the benthic and pelagic domains" which sampled three fixed stations in the North
Sea. Semi-autonomous in situ systems were deployed at each study site to follow temporal changes in
environmental conditions such as temperature, light, nutrients, and chlorophyll fluorescence. Detailed
studies of pelagic and benthic food webs were carried out during 8 research cruises spaced to capture
seasonal changes (February , April, May, September, and October/November 2007; January, April and
September 2008). Cruise sampling was focussed on identifying ecosystem structure, in terms of seabed
types, physics, chemistry, and the abundance (as numbers and/or biomass) and diversity of planktonic and
benthic communities (from micro- to macro- organisms). Experimental work was carried out to obtain
estimates of the rates of key processes such as primary production, zooplankton secondary production,
carbon cycling, and nutrient fluxes across the sediment-seawater interface.
Further details of the project can be found at:
`http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=13011`_
.. _`http://randd.defra.gov.uk/default.aspx?menu=menu&module=more&location=none&completed=0&projectid=13011`:
http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=13011