Seasonal Variation in Primary Productivity and its Interrelationship with Chlorophyll in the Lake Jaisamand (Rajasthan,India) |
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| Authors: | V S Durve P S Rao |
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| Abstract: | Lake Jaisamand near Udaipur (Rajasthan) is one of the oldest man-made lakes in India. The primary productivity of the lake showed a bimodal pattern with a first peak of a higher magnitude in July (7.605 g/m2d C) and the second of a lower magnitude (5.851 g/m2 dC) in December. The minimum production was 2.455 g/m2 dC in November. The chlorophyll values were high during low water levels of summer and low during monsoon months when the water level rises, thereby dispersing the phytoplankton biomass and decreasing its density per unit of water volume. From the results obtained it appears that beside temperature and transparency, the trophogenic area and seasonal water level fluctuations have a considerable influence on the primary productivity in this lake. Based on annual production rates and chlorophyll values lake Jaisamand could be regarded as an eutrophic waterbody. |
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