Table 5.

Physico-chemical parameters measured during the BioBlitz in 2017 in the water at different sites of the hydrological system in the study area of the Biological Field Station of Paimpont, University Rennes 1. The exact locations were 48.008425N, -2.2265516W (in zone Z1_Ea) for Etang d’en haut; 48.0079626N, -2.2268825W (in zone Z1_Fo) for Ruisseau de la grève 1; 48.0039444N, -2.230085W (in zone Z2_Ea) for Etang du Châtenay; 48.0032027N, -2.2302007W (in the zone Z2_Ea) for Dyke; and 48.0029530N, -2.2302378W (in the zone Z3_Bo1) for RG2 - Ruisseau de la grève 2. The sites in the table are listed downstream. For location of the zones, see Fig. 1. Chl a – Chlorophyll "a", Phyco – Phycocyanin, Turb – turbidity, PAR – photosynthetically active radiation. The depth of measurement is indicated relative to the water surface.

Site	Depth (m)	Chl a (RFU)	Phyco (RFU)	Turb (NTU)	PAR (μE.m−2.s−1)
Etang d'en haut	0.0-0.1	2.40 ± 2.80	7.23 ± 3.69	14.18 ± 12.71	569.24 ± 183.25
	0.1-0.5	34.11 ± 7.38	11.86 ± 1.70	1.88 ± 0.88	188.07 ± 75.81
	0.5-1.0	52.15 ± 8.40	15.89 ± 2.09	1.53 ± 0.21	53.08 ± 15.75
	1.0-1.5	54.39 ± 17.35	11.38 ± 3.16	1.72 ± 0.43	25.75 ± 3.47
	1.5-1.8	48.12 ± 17.14	10.83 ± 3.92	1.80 ± 0.48
Ruisseau de la grève 1	0.05	1.45 ± 0.24
Etang du Châtenay	0.0-0.1	5.28 ± 2.11	9.80 ± 7.72	7.02 ± 4.02	1241.65 ± 548.96
	0.1-0.5	12.26 ± 3.84	7.54 ± 1.79	2.53 ± 1.00	402.78 ± 164.55
	0.5-1.0	15.06 ± 4.57	8.77 ± 1.72	2.85 ± 0.42	128.17 ± 73.76
	1.0-1.5	19.81 ± 7.85	16.73 ± 10.71	3.90 ± 1.28	56.82 ± 19.67
	1.5-1.8	44.03 ± 17.72	16.57 ± 5.14	3.90 ± 0.54	23.22 ± 4.50
	1.8-2.5	14.36 ± 6.31	8.84 ± 1.65	5.20 ± 2.15	8.80 ± 3.06
	2.5-3.0	12.47 ± 2.22	7.41 ± 1.94	18.31 ± 4.40	2.51 ± 0.37
Dyke	0.88	17.40 ± 1.21	10.04 ± 0.86	2.68 ± 0.53	404.84 ± 28.91
Ruisseau de la grève 2	0.00	0.22 ± 0.17	0.16 ± 0.05	8.74 ± 7.87