Participatory surface algal bloom monitoring in Finland in 2011–2013

Environmental Systems Research

Table 1 Yearly counts and correlations

		Count			‘No algae’
Year	Area	Experts	Citizens	Mobile	Experts	Citizens	Correlation of original datasets	Mean of bootstrap correlations	95% confidence	Citizen spatial correlation	Citizen count correlation
2011	Whole	4572	872	31%	80%	60%	0.82	0.72	[0.53 0.86]	−0.20	−0.50
2012	Whole	4427	319	49%	86%	52%	0.88	0.65	[0.35 0.86]	−0.27	−0.59
2013	Whole	4150	465	29%	83%	42%	0.69	0.56	[0.29 0.76]	−0.32	−0.68
2011	Area1	283	217	20%	76%	79%	0.64	0.47	[0.13 0.79]	−0.24	0.16
2011	Area2	1257	433	35%	73%	61%	0.84	0.71	[0.49 0.88]	−0.04	−0.03
2012	Area2	1242	196	45%	78%	54%	0.55	0.40	[0.05 0.71]	0.68	−0.00
2013	Area2	1108	182	35%	73%	54%	0.80	0.57	[0.21 0.82]	−0.45	−0.47

Year, area (Whole = 59.5N 20E, 67.5N 32E, Area1 = 59.5N 22E, 60.5N 24E, Area2 = 59.5N 22E, 61.5N 26E), the count of observations by experts and citizens, the percentage of citizen mobile observations, percentages of ‘no algae detected’ observations, the correlation of expert and citizen weekly averages using the original datasets, mean of correlations calculated using bootstrapping method, 95% confidence interval of the bootstrap correlations, the correlation of weekly citizen observations’ variation and the weekly spatial distribution (citizen spatial correlation), and the correlation of the weekly citizen observations’ variation and the weekly count of observations (citizen count correlation).