Freshwater and marine water quality (nutrients and carbon) - Calvert Island - 2014 to 2018


This data package contains data associated with the manuscript St. Pierre et al. (2020), to be submitted to Biogeosciences. Data in this package characterise spatial and temporal variability in nutrient (nitrogen, phosphorus, iron, silica) and dissolved organic carbon (DOC) concentrations in seven freshwater streams on Calvert and Hecate Islands, and the surface (0-5 m) waters at 13 marine stations within Meay and Kwakshua Channels on the British Columbia Central Coast. Briefly, the streams and marine stations were sampled at approximately monthly intervals between August 2014 and December 2018. Detailed information on sampling protocols, sample analysis, and data processing can be found in St. Pierre et al. (2020).

There are 4 datasets associated with this package. Data dictionaries associated with each dataset are included in the ‘Data dictionary.xlsx’ spreadsheet. Methodological information is detailed in St. Pierre et al. (2020). Each dataset is described below: ‘Freshwater Chemistry (2014-2018) - Final.csv’: Concentrations of nutrients and dissolved organic carbon in mg/L. Used with discharge data to calculate stream fluxes. ‘All watershed nutrient fluxes - Final.csv’: Daily nutrient and organic carbon fluxes by watershed between 1-Aug-2014 and 31-Dec-2018. Also includes stoichiometric ratios of the fluxes. ‘Marine Nutrient + YSI data - Final.csv’: Measured surface water (0-5 m) nutrient and dissolved organic carbon chemistry across 13 marine stations in Kwakshua and Meay Channels. ‘Watershed Time Series - Rain and Air Temp.csv’: Watershed-specific monthly mean, minimum, and maximum air temperature and total monthly rainfall. Climate normals, model monthly temperature and precipitation were extracted from (Wang et al. 2016) using the weather station coordinates for comparison with the measured quantities and are also included.

Detailed methodology is found in: St. Pierre, K.A., Hunt, B.P.V, Tank, S.E., Giesbrecht, I., Floyd, W.C., Korver, M.C., Lertzman, K. (2020) Rain-fed streams dilute inorganic nutrients but subsidise organic matter-associated nutrients in coastal waters of the northeast Pacific Ocean. [To be submitted to Biogeosciences]

Associated are the discharge dataset (Korver et al. 2019a) and stream rainfall event sampling dataset (Korver et al. 2019b). Stream rainfall event chemistry is integrated into the ‘Freshwater Chemistry (2014-2018) Final.csv’ dataset.

Access and Use

Licence: Creative Commons Attribution 4.0

Data and Resources



Dataset extent

Map data © OpenStreetMap contributors

Metadata Reference Date(s) February 02, 2022 (Publication)
February 02, 2022 (Revision)
Frequency of Update As Needed

Responsible Party 1
Ian Giesbrecht
Hakai Institute
  • Custodian
  • Distributor
  • Owner

Field Value
Ocean Variables
  • Nutrients
  • Dissolved Organic Carbon
Scope Dataset
Status Completed
Topic Category oceans
Maintenance Note Generated from
Spatial Extent { "coordinates": [ [ [ -128.2, 51.64 ], [ -127.9, 51.64 ], [ -127.9, 51.74 ], [ -128.2, 51.74 ], [ -128.2, 51.64 ] ] ], "type": "Polygon" }
North Bounding Latitude 51.74
South Bounding Latitude 51.64
East Bounding Longitude -127.9
West Bounding Longitude -128.2
Vertical Extent
Default Locale English
Citation identifier