The variables in biota_data.csv describe the contaminant and biological effect data in biota used in the 2017 assessment of the UK's Clean Seas Environment Monitoring Programme. The column headers are:
seriesID
Description: timeseries identifier
Unit:
Type: categorical
Levels: 5014
Note: identifies the data (typically a station / contaminant / species combination) that were grouped together into a timeseries and modelled to assess status and trends
station
Description: station identifier
Unit:
Type: categorical
Levels: 246
Note: monitoring station – links to station information in biota_stations.csv
species
Description: species
Unit:
Type: categorical
Levels: 9
Note:
Crassostrea gigas: AphiaID = 140656
Gadus morhua: AphiaID = 126436
Limanda limanda: AphiaID = 127139
Merlangius merlangus: AphiaID = 126438
Mytilus edulis: AphiaID = 140480
Nucella lapillus: AphiaID = 140403
Platichthys flesus: AphiaID = 127141
Pleuronectes platessa: AphiaID = 127143
Scomber scombrus: AphiaID = 127023
sex
Description: sex
Unit:
Type: categorical
Levels: F, I, M, X
Note: see ICES reference codes for SEXCO
year
Description: monitoring year
Unit:
Type: discrete
Range: 1999, 2016
Note: for some data suppliers, monitoring is in winter and e.g. sampling in December 2015 and January 2016 would be regarded as having come from the same monitoring year
date
Description: sampling date
Unit:
Type: discrete
Range: 1999-01-01, 2016-10-27
Note:
sampleID
Description: sample identifier
Unit:
Type: categorical
Levels: 20116
Note: data from different matrices (e.g. LI and MU) in the same fish have different sampleIDs
matrix
Description: sample matrix
Unit:
Type: categorical
Levels: BI, BL, HML, LI, LIS9, MU, SB, WO
Note: see ICES reference codes for MATRX
group
Description: contaminant group
Unit:
Type: categorical
Levels: BDE, bioeffect, CB, imposex, metal, PAH.parent, pesticide
Note:
BDE = polybrominated diphenyl ethers
bioeffect = biological effects
CB = polychlorinated biphenyls
PAH.parent = parent polycyclic aromatic hydrocarbons
determinand
Description: contaminant
Unit:
Type: categorical
Levels: 44
Note: see ICES reference codes for PARAM; data submitted as CHRTR and VDSI have been relabelled as CHR and VDS respectively
metoa
Description: method of chemical analysis
Unit:
Type: categorical
Levels: 24
Note: see ICES reference codes for METOA
concentration
Description: concentration of contaminant or equivalent for biological effects
Unit: µg/kg ww (contaminants), ug/ml (PYR1OHEQ), nmol/min/mg protein (ACHE), pmol/min/mg protein (EROD), st (VDS), % (%DNATAIL), mins (LP, NRR), d (SURVT), nr/1000 cells (MNC)
Type: continuous
Range: 0, 438946
Note: all contaminant concentrations are expressed on a wet weight basis
qflag
Description: less-than qualifier for the concentration measurement
Unit:
Type: categorical
Levels: "", "<"
Note:
“<” indicates a value below the limit of detection
"” indicates a value above the limit of detection or where there is no limit of detection (e.g. VDS measurements)
uncertainty
Description: uncertainty in the concentration measurement
Unit: as for concentration
Type: continuous
Range: 0.0015, 35276
Note: analytical uncertainty expressed as the standard deviation; not applicable to some biological effects measurements
LNMEA
Description: mean length
Unit: cm
Type: continuous
Range: 0.1, 305
Note: mean length of monitoring organism in pool; **there are unit errors in these data, so the data should be used with caution*
DRYWT
Description: dry weight of the sample
Unit: %
Type: continuous
Range: 2.46, 91.6
Note: all values are above the limit of detection
DRYWT.uncertainty
Description: uncertainty in the dry weight measurement
Unit: %
Type: continuous
Range: 0.028, 12.4
Note: analytical uncertainty expressed as the standard deviation
LIPIDWT
Description: lipid weight of the sample
Unit: %
Type: continuous
Range: 0.09, 81.4
Note: all values are above the limit of detection
LIPIDWT.uncertainty
Description: uncertainty in the lipid weight measurement
Unit: %
Type: continuous
Range: 0.016, 10.1
Note: analytical uncertainty expressed as the standard deviation
noinp
Description: number of individuals pooled in the sample
Unit: nr
Type: discrete
Range: 1, 260
Note:
FEMALEPOP
Description: % of the sample that are females
Unit: %
Type: continuous
Range: 32.5, 100
Note: Used to model imposex data when submitted as a pooled sample
CMTQCNR
Description: Comet assay cells screened
Unit: nr
Type: discrete
Range: 13, 168
Note: Used to model Comet assay (%DNATAIL) data
MNCQCNR
Description: Micronucleus assay cells screened
Unit: nr
Type: discrete
Range: 1000, 5000
Note: Used to model Micronucleus assay (MNC) data