The effect of meteorological and chemical parameters on summer phytoplankton assemblages in an urban recreational lake | Knowledge and Management of Aquatic Ecosystems

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Table 1

Chemical parameters measured in the Sava Lake during summer of 2014.

Month	July			August			September
Week	W1	W2	W3	W4	W5	W6	W7	W8	W9
Water column (m)	0–6 m	0–6 m	0–6 m	0–6 m	0–6 m	0–6 m	0–6 m	0–6 m	0–6 m
Turbidity (NTU)	1–2.56	0.98–1.94	0.98–1.40	1.08–1.80	1.28–1.43	1.25–3.17	0.95–1.33	1.14–1.38	0.96–1.10
pH	8.18–8.41	8.03–8.09	7.29–7.77	7.49–7.63	7.75–8.03	7.44–8.11	7.76–7.84	8.15–8.24	8.03–8.17
Conductivity (μS/cm)	233–238	226–242	222–237	223–225	217–222	213–214	219–222	219–222	223–224
Ammonia (mg/L)	0.0521–0.0622	0.0541–0.0606	0.0449–0.0706	0.0256–0.0575	0.0271–0.0490	0.0162–0.0233	0.0526–0.0658	0.0675–0.0707	0.0401–0.0460
Nitrites (mg/L)	0.0049–0.0082	0.0036–0.0049	0.0013–0.0026	0.0007–0.0043	0.0007–0.0033	0.0010–0.0099	0.0016–0.0033	0.0020–0.0026	0.0020–0.0033
Nitrates (mg/L)	0.0022–0.0123	0.0461–0.2657	0.0022	0.0022–0.1164	0.2920–0.4501	0.0022–0.0198	0.0022–0.0123	0.0022	0.0022–0.0044
Dissolved inorganic nitrogen (mg/L)	0.0608–0.0711	0.0759–0.1231	0.0470–0.0737	0.0368–0.0623	0.0981–0.1425	0.0217–0.0280	0.0565–0.0690	0.0708–0.0739	0.0439–0.0485
Orthophosphate (mg/L)	0.0018–0.0064	0.0015–0.0026	0.0432–0.0579	0.0003–0.0432	0.0030–0.0040	0.0006–0.0013	0.0380–0.1726	0.0026–0.0392	0.0022–0.0192
Total phosphorus (mg/L)	0.0097–0.0192	0.0086–0.0111	0.0624–0.0772	0.0092–0.0591	0.0073–0.0092	0.0105–0.0124	0.0739–0.2014	0.0120–0.0714	0.0299–0.0379
Permanganate index (mg/mL)	8.3–10.2	7.4–8.3	5.4–6.7	6.9–7.3	7.9–11.7	10.7–11.7	10.1–11.0	10.1–11.4	8.5–8.8
SiO₂	–	0.46–0.68	0.0910–0.1336	0.2639–0.3903	0.4150–0.4780	0.3830–0.8060	0.3000–0.5780	0.3810–0.6220	0.5850–0.8110
Dissolved oxygen (mg/L)	11.4–12.4	10.50–12.80	8.50–9.80	8.70–9.10	8.7–10.20	9.00–9.50	10.70–11.40	9.60–10.00	8.40–10.70
BOD	1.5–2.5	4.00–4.50	1.60–2.10	1.70–2.70	1.30–1.80	1.30–3.20	5.50–6.10	1.50–3.10	1.00–3.00
Chlorophyll-a (μg/L)	5.49–6.10	3.66–5.49	4.88–6.10	6.10–7.93	2.36–8.30	5.49–9.15	6.10–8.54	7.93–8.54	7.93–10.37

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