Seasonal variations in response of periphytic algal community to nutrient enrichment in the river Ganga (Varanasi, India)

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Table 2

Important physicochemical characteristics of river (Ganga) water during March and June 2014.

Parameters	March 2014	June 2014	p
pH	7.8 ± 0.05	8.5 ± 0.04	^*
Conductivity (μS cm⁻¹)	580 ± 20	600 ± 20
Flow rate (cm s⁻¹)	24–28	32–38	^*
Total dissolved solids (mg L⁻¹)	0.28 ± 0.05	0.29 ± 0.04
Total phosphorus (mg L⁻¹)	0.11 ± 0.01	0.15 ± 0.05
Soluble reactive phosphorus (mg L⁻¹)	0.054 ± 0.02	0.058 ± 0.02
NO₃⁻-N (mg L⁻¹)	0.195 ± 0.02	0.390 ± 0.02	^*
NO₂⁻-N (mg L⁻¹)	0.030 ± 0.002	0.035 ± 0.002
NH₄⁺-N (mg L⁻¹)	0.01 ± 0.005	0.01 ± 0.004
Si (mg L⁻¹)	10.16 ± 0.02	12.50 ± 0.02

Data given are mean ± SE.

Indicates significant differences of limnological parameters between seasons at p < 0.05 (paired t-test).

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