Identification

Title

2007 - 2007 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Structure and function assessment of macrobenthic communities

Abstract

Four infaunal replicate samples were collected at each site using 0.1 m ^... Nioz corers (diameter of approximately 30 cm) were sieved on a 1mm mesh sieve, the sieve remains were then sorted and preserved following the methodology described by Boyd (2002). On return, to the laboratory all the infaunal samples were identified to the lowest taxonomic level as possible, counted and weighted. Five epifaunal replicate samples were collected at each site using 2 m beam trawls during each of the five research cruises. Each trawl was conducted at a constant speed (~2 knots per minute) and sampled an area of seabed of approximately 400 m ^... . Once on board, the contents of the trawl were sieved over 5mm mesh and all retained individuals were identified, counted and weighed. In some cases, the very high numbers of some groups (e.g. brittle stars, shrimps, and small fish) needed sub-sampling before counting and weighting. The raw abundance and biomass data for both the infauna (from the cores) and epifauna (trawls) were scaled to values per m ^... . As some taxa were present in both datasets, taxa which were more appropriately classed as infauna and/or their densities were better estimated via a corer were classed as infauna and removed from the trawl data. Accordingly, those taxa which were generally considered as epifaunal (and their numbers and biomasses better estimated using a trawl) were considered as epifaunal and/or their densities more suitably estimated using a trawl were reported as epifauna.

Resource type

dataset

Resource locator

Unique resource identifier

code

CEFAS974575b6-6069-478c-a286-5dfeb2f4e15a

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

1.73881

East bounding longitude

1.74086

North bounding latitude

52.4595

South bounding latitude

52.4581

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the 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

2007-02-01

End position

2007-10-31

Dataset reference date

date type

publication

effective date

2016-07-14

Frequency of update

notPlanned

Quality and validity

Lineage

Five research cruises were conducted (during February, April, May, September and October, 2007) at three study sites, north of the Dogger Bank (hereafter as DB) (55.68 º N, 2.28 º E), the Oyster Ground (54.41º N, 4.04º E) (hereafter as OG) and at Sean Gas Field (hereafter SGF) (53.17º N, 2.81º E). Previous research conducted at the sites, have shown that these sites have representative characteristics of larger regions with similar water column and seabed attributes, considering them as eco-hydrodynamic regions in the southern and central North Sea (see van der Molen et al., 2012; Painting and Foster, 2013). At each site four replicate samples were collected with a 0.1 m ^... Nioz corer to sample benthic infauna and sediments. From each Nioz corer, a small corer (internal diameter of 5.5 cm) was used to obtain sediments for the analysis of particle size, porosity, chlorophyll a/phaeopigment and organic carbon analysis. These cores were sliced at 0.5 to 1 cm intervals up to 10cm depth and stored at -20°C.

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