Relationships between benthic diatom assemblages’ structure and selected environmental parameters in Slovak water reservoirs (Slovakia, Europe) | Knowledge and Management of Aquatic Ecosystems

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Table 4

Pearson’s correlations among environmental parameters (p< 0.05); alt – altitude, mean-depth – mean depth, area – surface area, volume – maximum volume, flow – mean annual flow, ret-time – retention time, urban – percentage of urbanization, agri – percentage of agriculture, forest – percentage of forestry.

	alt	mean-depth	area	volume	flow	ret-time	urban	agri	forest	O₂	BOD	COD	pH	t	cond	NH₄-N	NO₃-N	TP	TN	alk	PO₄-P	ch-a	transp
alt	–	0.46	ns	ns	ns	ns	–0.52	–0.48	0.51	ns	–0.42	–0.57	ns	–0.72	–0.48	ns	–0.44	–0.50	–0.42	ns	–0.44	–0.42	0.73

mean-depth	0.46	–	ns	ns	ns	ns	ns	–0.56	0.55	ns	–0.61	ns	ns	ns	–0.45	ns	ns	–0.52	ns	ns	–0.52	–0.54	0.69

area	ns	ns	–	0.96	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	–0.45	ns	ns	ns	ns	ns	ns

volume	ns	ns	0.96	–	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	–0.48	ns	ns	ns	ns	ns	ns

flow	ns	ns	ns	ns	–	ns	0.86	0.51	–0.59	–0.59	ns	ns	–0.42	ns	ns	ns	ns	ns	ns	ns	0.62	ns	ns

ret-time	ns	ns	ns	ns	ns	–	ns	ns	ns	ns	–0.43	ns	ns	ns	ns	–0.56	ns	–0.48	ns	ns	–0.53	ns	ns

urban	–0.52	ns	ns	ns	0.86	ns	–	0.65	–0.73	–0.64	ns	ns	ns	ns	0.52	ns	ns	ns	ns	0.46	0.67	ns	ns

agri	–0.48	–0.56	ns	ns	0.51	ns	0.65	–	–0.99	ns	ns	ns	ns	ns	0.59	ns	ns	ns	ns	0.53	ns	ns	–0.49

forest	0.51	0.55	ns	ns	–0.59	ns	–0.73	–0.99	–	0.45	ns	ns	ns	ns	–0.61	ns	ns	ns	ns	–0.54	ns	ns	0.49

O₂	ns	ns	ns	ns	–0.59	ns	–0.64	ns	0.45	–	ns	ns	0.53	ns	ns	ns	ns	ns	ns	ns	–0.53	ns	ns

BOD	–0.42	–0.61	ns	ns	ns	–0.43	ns	ns	ns	ns	–	0.66	ns	ns	0.51	ns	ns	0.83	ns	ns	0.57	0.96	–0.72

COD	–0.57	ns	ns	ns	ns	ns	ns	ns	ns	ns	0.66	–	ns	0.53	0.51	0.58	ns	0.71	0.58	0.42	ns	0.67	–0.62

pH	ns	ns	ns	ns	–0.42	ns	ns	ns	ns	0.53	ns	ns	–	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns

t	–0.72	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	0.53	ns	–	ns	ns	ns	ns	ns	ns	ns	ns	–0.42

cond	–0.48	–0.45	ns	ns	ns	ns	0.52	0.59	–0.61	ns	0.51	0.51	ns	ns	–	0.46	0.45	ns	0.60	0.96	ns	0.47	–0.61

NH₄–N	ns	ns	ns	ns	ns	–0.52	ns	ns	ns	ns	ns	0.50	ns	ns	0.45	–	ns	0.57	0.63	0.42	0.50	ns	–0.43

NO₃–N	–0.44	ns	–0.45	–0.48	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	0.45	0.50	–	ns	0.80	ns	ns	ns	–0.48

TP	–0.50	–0.52	ns	ns	ns	–0.48	ns	ns	ns	ns	0.83	0.71	ns	ns	ns	0.61	ns	–	0.47	ns	0.82	0.81	–0.63

TN	–0.42	ns	ns	ns	ns	ns	ns	ns	ns	ns	ns	0.58	ns	ns	0.60	0.72	0.80	0.47	–	0.51	ns	0.43	–0.45

alk	ns	ns	ns	ns	ns	ns	0.46	0.53	–0.54	ns	ns	0.42	ns	ns	0.96	ns	ns	ns	0.51	–	ns	ns	–0.52

PO₄–P	–0.44	–0.52	ns	ns	0.62	–0.53	0.67	ns	ns	–0.53	0.57	ns	ns	ns	ns	0.51	ns	0.82	ns	ns	–	0.53	–0.47

ch–a	–0.42	–0.54	ns	ns	ns	ns	ns	ns	ns	ns	0.96	0.67	ns	ns	0.47	ns	ns	0.81	0.43	ns	0.53	–	–0.68

transp	0.73	0.69	ns	ns	ns	ns	ns	–0.49	0.49	ns	–0.72	–0.62	ns	–0.42	–0.61	–0.44	–0.48	–0.63	–0.45	–0.52	–0.47	–0.68	–

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