Influence of Water Hyacinth Cover on the Physico-chemical Characteristics of Water and Phytoplankton Composition in a Reservoir near Jaipur (India)
✍ Scribed by Dr. B. Gopal; Dr. R. K. Trivedy; Dr. P. K. Goel
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 434 KB
- Volume
- 69
- Category
- Article
- ISSN
- 1434-2944
No coin nor oath required. For personal study only.
✦ Synopsis
Water hyacint.h (Eick.hornia crassipes (MART.) SOL~IS.) invaded a eutrophic reservoir receiving domestic sewage near Jaipur (India) during 1975 and gradually developed a complete thick cover over the whole water body during Sept.-Oct. 1978. The physico-chemical characteristics of the water and the phytoplankton composition were studied during Sept. 1977-Sept. 1979 by fort- nightly sampling. The changes observed during the second year of study are ascribed to the water hyacinth cover. The important changes were: lowering of water temperature, pH, dissolved oxygen content and nitrate nitrogen, and increase in total alkalinity, free carbon dioxide, chemicid oxygen demand, ammonia nitrogen, sulphides, calcium, magnesium and phosphate phosphorus. The changes in the phytoplankton were both qualitative and quantitative. The green algrte, particularly the species of dnkistrodesmus, Chlorella, Crucigenia and Selenastrum, increased considerably and replaced the blue-green algae, of which OsciZZatoriu and Microcystis disappeared totally. The densities of seveml other taxa changed significantly.
€3. GOPAL ef nl.