The structure of winter phytoplankton in Lake Nero, Russia, a hypertrophic lake dominated by Planktothrix-like Cyanobacteria

Table 2 Coefficients of nonparametric Spearman correlation

	NO₃^-- N	P total	Ice	O₂	Water level	В Cyan.%	B Flag.%	Chl - a	B total
NH ₄ ⁺ - N	-0.8*	0.1	0.5*	-0.9*	-0.4*	-0.1	-0.0	0.1	-0.1
NO ₃ ^- - N		0.1	-0.4*	0.6*	0.4	-0.1	0.1	-0.2	-0.1
P total			-0.3	-0.1	-0.4*	-0.8*	0.7*	0.0	-0.1
Ice				-0.7*	0.0	0.4	-0.4	-0.0	-0.3
O ₂					0.6*	0.1	-0.0	0.1	0.2
Waterlevel						0.5*	-0.5*	0.1	-0.1
В Cyan.%							-0.8*	0.1	0.1
B Flag.%								0.0	0.1
Chl – a									0.7*

Asterisk (*) denotes a significant differences at р<0.05. NH₄+-N – ammonium nitrogen; NO₃^— -N – nitrate nitrogen; P total – Total phosphorus; Ice – the thick of the ice; O₂ – oxygen concentrations; Water level – the level of the water; B Cyan.% - the percent Cyanophyta from total biomass; B Flag.% - the percent Euglenophyta and Cryptophyta flagellates from total biomass; Chl – a – chlorophill a concentrations, B total – Total Biomass.