Bioassay Response to Additions of Urea in Simulated Lake Environments
| Main Author: | Dr HK Garg |
|---|---|
| Format: | Article |
| Terbitan: |
, 2003
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/1253683 |
Daftar Isi:
- Three lentic water resources of Bhopal viz. Upper lake, Lower lake and Shahpura lake were studied for their limnochemical and biological characteristics. By adding different concentrations of urea, in microcosms developed from these reservoirs, an effort has been made to evaluate the effect of nitrogen on hydrobiological parameters. On treatment with urea, microcosmal waters exhibited erratic fluctuations in the amount of total Kjeldahl nitrogen (21.0-33.6 mg/l, UL; 33.6-49.4 mg/l, SL). Concentration of nitrate was more in treated microcosms than the controlled ones. Bioassay response depicted numeric reduction in total phytoplankton with the passage of time. Addition of urea resulted in two antithetic reactions-inhibition of ground water dominant chlorophytes and stimulation of cyanophytes.