Ecological study of Periphyton in lake Naukuchiatal
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Date
2019-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present study was done in an artificially aerated Lake Naukuchiatal to examine periphyton community structure and periphyton diversity along with various physico-chemical parameters of the lake. Three sampling sites named as S1 (near pump house), S2 (near parichay hotel) and S3 (near boat stand) were selected for the study. Samples were collected fortnightly to evaluate the water quality and periphyton community for a period of 8 months from September, 2018 to April, 2019. The range of physical properties i.e. water temperature, transparency, electrical conductivity and total dissolved solids during the study period was 17.96 ± 0.07 to 23.20 ± 0.00 °C, 170.66 ± 2.02 to 256.50 ± 3.50 cm, 196.80 ± 0.68 to 232.90 ± 1.81 μS/cm and 82.62 ± 0.42 to 117.30 ± 1.04 mgL-1 respectively. During research period chemical parameters like pH, dissolved oxygen, free CO2, total alkalinity, nitrate and phosphate levels were found to be in the range of 7.35 ± 1.09 to 8.99 ± 0.01, 7.41 ± 0.02 to 10.40 ± 0.06 mgL-1, 0 ± 0.00 to 2.93 ± 0.02 mgL-1, 83.83 ± 2.50 to 107.68 ± 1.11 mgL-1, 0.19 ± 0.00 to 0.23 ± 0.00 mgL-1 and 0.07 ± 0.00 to 0.24 ± 0.14 mgL-1 respectively. The floristic composition of Lake Naukuchiatal consists of total number of 44 different Periphytic taxa belonging to classes namely Bacillariophyceae (19), Chlorophyceae (16), Cyanophyceae (4), Xanthophyceae (1), Protozoans (1) and Rotifers (3). The periphyton community density ranges from 3000 to 45000 individual/cm2 from top (1 meter) to bottom (10 meter). Group wise distribution of Periphyton diversity revealed that Bacillariophyceae was dominant group followed by Chlorophyceae. Cyanophyceae, Xanthophyceae, Protozoans and Rotifers were recorded seasonally. It was observed that maximum diversity in the lake was found during the month of April followed by September and October.
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