Identification

Title

2007 - 2008 Centre for Environment, Fisheries & Aquaculture Science (Cefas) North Sea Organic Carbon and Nitrogen in Sediments

Alternative title(s)

sediment carbon and nitrogen

Abstract

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).

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/910/

function: order

Unique resource identifier

code

CEFASd4368bcc-2ab3-49c3-ab6d-9a60d85c5fc5

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

2

East bounding longitude

5

North bounding latitude

55.75

South bounding latitude

53

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

2007-01-01

End position

2008-12-31

Dataset reference date

date type

publication

effective date

2016-07-14

Frequency of update

notPlanned

Quality and validity

Lineage

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

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2016-07-14T12:28:23

Metadata language