Table 1.

Overview of average chlorophyll a (chl a) concentrations (mM) and molar ratios with other pigments per site: Pheo = pheophytin a, Neo = neoxanthin, Vio = violaxanthin, Lut = lutein, Zea = zeaxanthin, PPG = purpurogallin, Ast = astaxanthin, Ast-ester = astaxanthin fatty acid derivatives (mono and di esters) and GA:SA = biomass ratio of glacier ice and snow algae.

Site	Chlorophylls				Primary carotenoids								Phenols		Secondary carotenoids										Biomass
	Chl a		Pheo:Chl a		Neo:Chl a		Zea:Chl a		Vio:Chl a		Lut:Chl a		PPG:Chl a		Trans-Ast:Chl a		Trans-Ast-mono-ester:Chl a		Trans-Ast-di-ester:Chl a		Cis-Ast-mono-ester:Chl a		Cis-Ast-di-ester:Chl a		GA:SA
	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	Mean	Range	mean
BR	1.5E−04 ± 6.8E−05	9.7E−05–2.2E−04	0.49 ± 0.85	0–1.47	0.31 ± 0.24	0.06–0.53	0.06 ± 0.11	0–0.19	0.16 ± 0.12	0.04–0.28	0.00	0–0	19.45 ± 9.67	9.03–28.11	1.08 ± 0.22	0.93–1.33	22.62 ± 10.23	25.67–30.97	16.68 ± 5.04	11.31–21.31	89.26 ± 12.72	77.98–103.05	24.94 ± 8.30	17.48–33.87	2.73
HE1	4.4E−06 ± 3.7E−06	1.7E−06–7.1E−06	0.00	0–0	0.37	0.52–0.22	0.08	0.04–0.12	0.56 ± 0.27	0.74–0.37	0.00	0–0	263.51 ± 372.66	0–527.02	0.21	0.20–0.22	17.50	12.19–22.81	5.76	5.43–6.09	11.36	5.15–17.55	1.04	0.22–1.86	16.57
HE2	4.9E−06 ± 5.6E−06	2.3E−07–1.1E−05	0.00	0–0	0.12 ± 0.06	0.14–0.05	0.01 ± 0.01	0–0.02	0.20 ± 0.05	0.15–0.25	0.12 ± 0.19	0–0.012	155.37 ± 212.13	25.55–400.17	0.03 ± 0.05	0–0.08	5.90 ± 5.28	1.83–11.87	12.14 ± 10.05	4.68–23.56	8.91 ± 12.38	0.17–23.08	5.68 ± 5.90	0.73–12.2	Only GA
MIT1	4.4E−06 ± 3.0E−06	1.5E−06–7.5E−06	0.00	0–0	0.00 ± 0.00	0–0	0.00	0–0	0.00	0–0	0.19 ± 0.14	0.06–0.34	0.00	0–0	0.03 ± 0.03	0–0.05	4.09 ± 1.27	2.91–5.42	9.10 ± 2.34	7.72–11.80	10.52 ± 8.29	0.98–16.01	28.05 ± 11.85	16.62–40.27	0.49
MIT2	3.8E−05 ± 3.2E−05	1.7E−05–7.4E−05	1.19 ± 0.50	0.72–1.71	0.11 ± 0.07	0.05–0.19	0.04 ± 0.07	0–0.13	0.12 ± 0.14	0–0.27	0.20 ±  0.26	0–0.49	0.00	0–0	0.05 ± 0.02	0.03–0.07	8.27 ± 4.22	3.73–12.06	11.84 ± 5.15	8.31–17.75	33.31 ± 13.33	19.38–45.96	62.89 ± 22.51	57.55–88.73	0.07
MIT3	5.7E−05 ± 4.4E−05	1.6E−05–1.0E−04	0.54 ± 0.36	0.15–0.86	0.10 ± 0.03	0.07–0.13	0.07 ± 0.06	0–0.11	0.13 ± 0.06	0.07–0.19	0.65 ± 0.18	0.49–0.61	63.82 ± 48.09	27.67–118.40	0.32 ± 0.28	0–0.54	25.04 ± 4.72	20.55–29.96	4.27 ± 0.83	3.47–5.13	29.49 ± 2.93	26.56–32.42	0.41 ± 0.39	0.05–0.83	13.14
MIT4	5.3E−05 ± 1.4E−05	3.7E−05–6.3E−05	0.42 ± 0.30	0.22–0.76	0.44 ± 0.20	0.21–0.57	0.15 ± 0.26	0–0.45	0.58 ± 0.20	0.41–0.80	0.98 ± 0.40	0.65–1.42	24.85 ± 30.42	4.02–59.76	1.37 ± 0.62	0.98–2.08	31.51 ± 7.34	23.12–36.71	5.97 ± 2.24	4.16–8.45	37.17 ± 10.23	25.36–43.43	0.73 ± 0.47	0.19–1.02	1.68
MIT5	9.1E−05 ± 2.7E−05	6.0E−05–1.1E−04	0.27 ± 0.08	0.21–0.36	0.15 ± 0.21	0–0.39	0.14 ± 0.13	0–0.25	0.20 ± 0.19	0.03–0.4	0.54 ± 0.16	0.44–0.72	26.88 ± 27.54	4.3–57.57	0.96 ± 0.40	0.60–1.38	23.80 ± 10.47	12.12–32.34	3.83 ± 0.37	3.49–4.22	30.19 ± 6.72	23.45–36.88	0.43 ± 0.30	0.18–0.76	1.75
MIT6	9.5E−06		0.92		0.04		0.08		0.18		0.32		108.15		0.07		56.61		85.73		45.27		0.77		Only GA

Data are presented as averages per site followed by the standard deviation (n = 3).

See Supplementary Material for concentrations in mg L⁻¹ (Table S6).