Table 1. Column names, column description and explanation/format or unit for each feature of the lake file.

Column name	Description	Explanation or format or unit
Lake_ID	A code given to each studied lake	e.g. TR_BEY_I,
		TR = country code (Turkey),
		BEY = three first letters of lake name (Lake Beysehir),
		I = if more than one lake basins were sampled
Date	Date of sample collection	YYYY-MM-DD
LakeName	Name of lake that is commonly used	Name
LabName	The name of the laboratory that organized the local sampling	Name
Country	Geographic location of lake	Name
Latitude	Latitude coordinate of lake	Decimal degrees (WGS84)
Longitude	Longitude coordinate of lake	Decimal degrees (WGS84)
Altitude_m	Elevation of lake surface relative to sea level	Metres
MaximumDepth_m	Maximum depth of lake	Metres
MeanDepth_m	Mean depth of lake	Metres
SecchiDepth_m	Secchi depth reading	Metres
SamplingDepth_m	Depth of sample collection	Metres
	(lower limit of the sampling interval)
ThermoclineDepth_m	Location of the thermocline	Metres
		NA signifies a non-stratified lake (no thermocline detected)
SurfaceTemperature_C	Lake water temperature at 0.5 m depth	Degrees Celsius
EpilimneticTemperature_C	Averaged lake water temperature from surface until bottom of the thermocline	Degrees Celsius
TP_mgL	Concentration of total phosphorus	Milligrams per litre
TN_mgL	Concentration of total nitrogen	Milligrams per litre
NO3NO2_mgL	Concentration of nitrates and nitrites (dissolved nutrients)	Milligrams per litre
NH4_mgL	Concentration of ammonia (dissolved nutrients)	Milligrams per litre
PO4_ugL	Concentration of ortho-phosphate (dissolved nutrients)	Micrograms per litre
Chlorophylla_ugL	Concentration of photosynthetic pigment chlorophyll-a	Micrograms per litre
Chlorophyllb_ugL	Concentration of photosynthetic pigment chlorophyll-b	Micrograms per litre
Zeaxanthin_ugL	Concentration of photosynthetic pigment zeaxanthin	Micrograms per litre
Diadinoxanthin_ugL	Concentration of photosynthetic pigment diadinoxanthin	Micrograms per litre
Fucoxanthin_ugL	Concentration of photosynthetic pigment fucoxanthin	Micrograms per litre
Diatoxanthin_ugL	Concentration of photosynthetic pigment diatoxanthin	Micrograms per litre
Alloxanthin_ugL	Concentration of photosynthetic pigment alloxanthin	Micrograms per litre
Peridinin_ugL	Concentration of photosynthetic pigment peridinin	Micrograms per litre
Chlorophyllc2_ugL	Concentration of photosynthetic pigment chlorophyll-c2	Micrograms per litre
Echinenone_ugL	Concentration of photosynthetic pigment echinenone	Micrograms per litre
Lutein_ugL	Concentration of photosynthetic pigment lutein	Micrograms per litre
Violaxanthin_ugL	Concentration of photosynthetic pigment violaxanthin	Micrograms per litre
MC_YR.ugL	Concentration of cyanobacterial hepatotoxin microcystin YR	Micrograms per litre
MC_dmRR.ugL	Concentration of cyanobacterial hepatotoxin microcystin dmRR	Micrograms per litre
MC_RR_ugL	Concentration of cyanobacterial hepatotoxin microcystin RR	Micrograms per litre
MC_dmLR_ugL	Concentration of cyanobacterial hepatotoxin microcystin dmLR	Micrograms per litre
MC_LR_ugL	Concentration of cyanobacterial hepatotoxin microcystin LR	Micrograms per litre
MC_LY_ugL	Concentration of cyanobacterial hepatotoxin microcystin LY	Micrograms per litre
MC_LW_ugL	Concentration of cyanobacterial hepatotoxin microcystin LW	Micrograms per litre
MC_LF_ugL	Concentration of cyanobacterial hepatotoxin microcystin LF	Micrograms per litre
NOD_ugL	Concentration of cyanobacterial hepatotoxin nodularin	Micrograms per litre
CYN_ugL	Concentration of cyanobacterial cytotoxin cylindrospermopsin	Micrograms per litre
ATX_ugL	Concentration of cyanobacterial neurotoxin anatoxin-a	Micrograms per litre