Identification

Title

2016 - 2020 Centre for Environment, Fisheries & Aquaculture Science (Cefas) West Gabbard zooplankton abundance time series monitoring using ZooScan from 2016 to 2020

Abstract

Estimates of zooplankton taxa abundances identified and analysed using semi-automated methods with the ZooScan instrument and EcoTaxa web application. Data are obtained from opportunistic ringnet sampling at the West Gabbard sampling location as part of a time series. The dataset currently contains the results from zooplankton samples obtained from 30/06/2016 - 17/12/2020, although the time series is ongoing. After subsequent image analysis, the sampling information and results are analysed to provide abundance estimates for zooplankton taxa in m3.

Resource type

series

Resource locator

Unique resource identifier

code

CEFASedcc1f23-c1cc-4c05-89f3-a0550badbd08

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

Keywords

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Geographic location

West bounding longitude

2

East bounding longitude

2.5

North bounding latitude

52

South bounding latitude

51.75

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

2016-06-29T23:00:00.000Z

End position

2020-12-17T00:00:00.000Z

Dataset reference date

date type

publication

effective date

2021-12-20

Frequency of update

notPlanned

Quality and validity

Lineage

Since 30th June 2016, opportunistic sampling has been undertaken by the RV Cefas Endeavour throughout the year by vertically deploying 0.5m 200µm mesh ringnets at the West Gabbard sampling location. Samples are sent back to the Plankton Lab at the Lowestoft laboratory. These are then prepped and scanned for image analysis using ZooScan, with the obtained images subsequently being imported into the EcoTaxa project library. Once uploaded into EcoTaxa, sample scan images are predicted into taxa categories with the provision of a learning set to aid automatic image sorting using Random Forest algorithms. These predicted classifications are validated afterward by an experienced taxonomist and the metadata downloaded. Objects captured in images are separated into zooplankton taxa and detritus groups and abundances are estimated (per meter cubed) using counts and sample fraction calculations. An agreed subset of the data may be selected for QC checks by a second analyst.

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

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

2021-12-20T15:00:57

Metadata language