Metals in biota data

This repo contains data on metal concentrations in biota as collected by NRM in Swedish lakes, for more information see this report.

File LIMN_metals.csv

This contains the measurements.

Column	Contents
ACCNR	Accession number, unique identifier assigned to individual (fish).
PARAMETER_NAME	Name of substance (SWE).
PARAMETER_CODE	Code of substance according to [this list](http
PARAMETER_CODE_NRM	Code of substance used by NRM. Note that this also contains info on lab, e.g. HGFS and HGFSI both refer to mercury but with concentration measured by different labs.
YEAR	Year of accession.
DATE_COLLECTED	Date individual was collected/caught.
STATION_CODE_NRM	Lake, as coded by NRM. See LIMN_stations.csv.
GENUS	Species (ESOX = Pike, PERC = Perch, RUTI = Roach, SALV = Arctic char).
ORGAN	Part of fish analysed (muscle for mercury and liver for other metals).
LAB	Laboratory performing the analysis.
VALUE	Measured concentration. If the concentration is below the level of quantification (LOQ) this is reported as a negative number (-LOQ).
VALUE_UNIT	Unit of measurement.
LIVER_DW_PRC	Dry-weight percentage, liver sample.
MUSCLE_DW_PRC	Dry-weight percentage, muscle sample.
LENGTH	Length of fish.
WEIGHT	Weight of fish.
AGE	Age of fish.
SEX	Sex of fish.

File LIMN_metals.csv

This contains information on the lakes/stations.

Column	Contents
STATION_CODE_NRM	NRM code of lake, key to join with LIMN_metals.csv
STATION_NAME	Name of lake
STATION_CODE	Code of sampling location as listed in stationsregistret. This could possibly be used to link with other sources, but larger lakes most likely have multiple locations.
POS_SWEREF_TM_N	Position, see SWEREF
POS_SWEREF_TM_E	Position, see SWEREF