IMIS

The dataset includes variables: Week_day Day of the week when the observation was recorded (e.g., Mo, Tu, We); DateCalendar date of sampling (YYYY-MM-DD); Time_(GMT+3)Time of sampling, reported in local time (GMT+3);Water_Temperature_CSurface water temperature in °C; SalinityWater salinity (practical salinity units, PSU); Quality_score_Visual_valuationSubjective  score of water quality (scale, 1–5), based on visual inspection: 1_An algal film is visible on the water surface; 2_The water is intensely green; the bottom is not visible (0.5 m depth); 3_The water is turbid, greenish in color; 4_The water is clear, with a visible greenish tint; 5_The water is clear; Presence_Fil_algaePresence (1) or absence (0) of filamentous algae; Fluorometric measurements (FluoroProbe II) in replicate sample 1 (M1) and sample 2 (M2), μgL-1: M1/M2_Green_algae_fluor – Fluorescence estimate of green algae (M1). M1/M2_Cyanobacteria_fluor – Fluorescence estimate of cyanobacteria (M1). M1/M2_Diatoms_fluor – Fluorescence estimate of diatoms (M1). M1/M2_Cryptophytes_fluor – Fluorescence estimate of cryptophytes (M1).M1/M2_Yellow_subs_fluor – Fluorescence estimate of yellow substances (M1). M1/M2_Total_Chla_fluor – Total chlorophyll a concentration by fluorometer (sum of groups, M1). Total_Chla_Spec_Chlorophyll a concentration measured spectrophotometrically after pigment extraction (µg L-1), according to ISO 10260.Human activity: Beach_visitors Number of people present on the Melnragė beach Section: from Melnragė Mole to Battery Nordmole (WWII Bunker)at the time of sampling. Cars_parking Number of cars in the beach parking (Vėtros Street 55.73432566726889, 21.087488498975766) lot at the time of sampling. Melnragė Beach Water Sampling location55.73129835079257, 21.08497898758956 Total number of samples 116.