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Assessment of Trophic State of Nagin Lake Based on Limnological and Bacteriological Studies


Affiliations
1 Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, India
 

The present study was carried out to evaluate the trophic condition of Nagin Lake, Kashmir, based on its limnological features and bacterial load. A total of 15 limnological parameters were analysed, besides the bacterial load. The average values recorded were: air temperature (16.19±1.23°C), water temperature (12.40±0.92°C), depth (3.14±0.14 m), transparency (1.93±0.07m), TDS (149.52±5.66 mg.L-1), TSS (95.63±3.27 mg.L-1), pH (8.42±0.07), conductivity (260.61±12.16 μScm-1), dissolved oxygen (6.96±0.13 mg.L-1), free carbon-dioxide (0.55±0.20 mg.L-1), ammonia (199.6±10.34 μg.L-1), nitrate (399.94±203μg.L-1), total phosphorus (492.12±21.79μg.L-1), orthophosphate (50.06± 2.83μg.L-1) and chlorophyll-a (13.43±0.86μg.L-1). Most of the parameters recorded higher values during the warmer seasons of summer and autumn. The bacterial load showed an increasing trend from winter to summer, showing its direct relation with temperature and inverse relation with the dissolved oxygen content. Carlson’s Trophic State Index was used to calculate the trophic state of the lake which showed higher values, suggesting the deteriorating condition of the lake water.

Keywords

Limnology, Bacterial Count, Nagin Lake, Carlson’s Index, Trophic State.
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  • Assessment of Trophic State of Nagin Lake Based on Limnological and Bacteriological Studies

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Authors

Monisa Malik
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, India
M. H. Balkhi
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, India
Adnan Abubakr
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, India
Farooz Bhat
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, India

Abstract


The present study was carried out to evaluate the trophic condition of Nagin Lake, Kashmir, based on its limnological features and bacterial load. A total of 15 limnological parameters were analysed, besides the bacterial load. The average values recorded were: air temperature (16.19±1.23°C), water temperature (12.40±0.92°C), depth (3.14±0.14 m), transparency (1.93±0.07m), TDS (149.52±5.66 mg.L-1), TSS (95.63±3.27 mg.L-1), pH (8.42±0.07), conductivity (260.61±12.16 μScm-1), dissolved oxygen (6.96±0.13 mg.L-1), free carbon-dioxide (0.55±0.20 mg.L-1), ammonia (199.6±10.34 μg.L-1), nitrate (399.94±203μg.L-1), total phosphorus (492.12±21.79μg.L-1), orthophosphate (50.06± 2.83μg.L-1) and chlorophyll-a (13.43±0.86μg.L-1). Most of the parameters recorded higher values during the warmer seasons of summer and autumn. The bacterial load showed an increasing trend from winter to summer, showing its direct relation with temperature and inverse relation with the dissolved oxygen content. Carlson’s Trophic State Index was used to calculate the trophic state of the lake which showed higher values, suggesting the deteriorating condition of the lake water.

Keywords


Limnology, Bacterial Count, Nagin Lake, Carlson’s Index, Trophic State.