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Abstract Background From the last few decades several lakes and wetlands showed water quality degradation that is one of the major problems globally resulting in serious environmental impacts and concern in both aquatic and terrestrial environs. Methods During this study we evaluated a number of water parameters [water temperature, depth, transparency, hydrogen ion concentration (pH), dissolved oxygen, chloride, calcium, magnesium, total alkalinity, nitrogen and phosphorus] on the monthly basis in September 2012–August 2013 in Hokersar wetland. Results From the year 1978 till 2012–13, the number of parameters showed an increasing trend except for pH and dissolved oxygen. Remarkable temporal variations were recorded in various parameters during the past and present study (e.g. dissolved oxygen showed a decrease of about 2.4 mg/L and pH 0.8 units. Calcium, magnesium, alkalinity, ammonical nitrogen and nitrate nitrogen depicted many fold increase in the last four decades). Among the recorded parameters significant positive correlations were observed between depth and chloride (r = 0.408, p |
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