Biogeochemical monitoring of the Keweenaw waterway, a Lake Superior connected channel
Data files
Mar 16, 2026 version files 23.43 KB
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README.md
3.42 KB
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winterwaters_master_data_list.csv
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Abstract
Biogeochemical parameters were monitored over the course of multiple seasons in the Keweenaw Waterway, a Lake Superior connected channel in the Upper Peninsula of Michigan. Sample collection was conducted weekly during winter and at longer intervals during summer and shoulder seasons.
Dataset DOI: 10.5061/dryad.m37pvmdfr
Description of the data and file structure
Water samples were collected from 1 meter below the surface of the water, or bottom of the ice, using a peristaltic pump.
Files and variables
File: winterwaters_master_data_list.csv
Description:
Variables
- SampleID: Sample identifier
- Collection_Date: Date of collection
- Year: Year of collection
- Month: Month of collection
- Season: Season of collection
- MonthYear: Concatenated month and year
- site: Site identifier
- sample type: Sample medium
- depth_m: Collection depth
- ice: Ice present (on) or absent (off)
- icethick_cm :
- snowdepth_cm:
- water_temp_C: from sonde
- Act_cond_uScm: Actual conductivity from sonde
- Sp_cond_uScm: Specific conductivity from sonde
- DO_mgL: Dissolved oxygen from sonde
- DO_percent_sat: from sonde
- pH: from sonde
- atms_temp_C: Atmospheric temperature
- avg_docmgL: Dissolved organic carbon in milligrams of C per liter
- avg_doc_umolL:
- avg_tdn_mgL: Total dissolved nitrogen in milligrams of N per liter
- avg_tdn_umolL:
- avg_srp_mgL: Soluble reactive phosphorus in milligrams of P per liter
- avg_srp_umolL:
- bix: Biological index, derived from excitation emission matrix spectroscopy data
- fi: Freshness index, derived from excitation emission matrix spectroscopy data
- hix: Humification index, derived from excitation emission matrix spectroscopy data
- suva254: Specific UV absorbance at 254 nm
- a254:a365: absorbance at 254 nm/absorbance at 365 nm
- bact_cell_mL: bacterial cells per milliliter
- chla_ugL: micrograms of chlorophyll-a per milliliter
- BP_leu_ugC_L_d: bacterial production derived from tritiated leucine incorporation and converted to carbon in micrograms of carbon per liter per day
- BP_tdr_ugC_L_d: bacterial production derived from tritiated thymidine incorporation and converted to carbon in micrograms of carbon per liter per day
- BP_nMleu_d: bacterial production derived from leucine incorporation in nanomoles of leucine per liter per day
- BP_nMtdr_d: bacterial production derived from thymidine incorporation in nanomoles of thymidine per liter per day
- leu_tdr: ratio of leucine to thymidine incorporation
- BP_14C_ugC_L_d: bacterial incorporation of 14C-labelled leucine
- BP_14C_nMleu_d: bacterial incorporation of 14C-labelled leucine
- BR_14C_nMleu_d: bacterial respiration of 14C-labelled leucine
- bge: Bacterial growth efficiency
- LightPPR_ugCLh: Primary production in the light in micrograms of carbon per liter per hour
- LightPPR.Chl: ratio of PPR to chlorophyll-a concentration
- DarkPPR_ugCLh: Primary production in the dark
- Light.Chlor_ugCLh: Primary production amended with chloramphenicol
- Dark.Chlor_ugCLh: Primary production amended with chloramphenicol
- ECRL_ugCLh: extracellular release of photosynthate in the light
- ECRD_ugCLh: extracellular release of photosynthate in the dark
- ECRLChlor_ugCLh: ECR after chloramphenicol addition
- ECRDChlor_ugCLh: ECR after chloramphenicol addition
- PER_Light: Percent of total photosynthate released extracellularly
- PER_Dark: Percent of total carbon fixation released extracellularly
- PER_LightChlor: PER after chloramphenicol amendment
- PER_DarkChlor: PER after chloramphenicol amendment
Blank cells indicate missing values