Seasonal Dynamics of Planktonic Community Metabolism in Newly Constructed Tropical Ponds in a Swampy Area
✍ Scribed by Radheyshyam; D. R. Naik
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 652 KB
- Volume
- 77
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Studies on community metabolism in newly constructed ponds on a swampy area were made over a period of twenty-four months from November, 1981 to October, 1983. The fluctuations in the gross and net primary productions, photosynthetic efficiency and assimilation efficiency are discussed. The productivity of ponds was apparently influenced by the physico-chemical and biological environment of the water. pH, secchi disc transparency, phosphate and nitrate-N were negatively correlated with gross primary productivity, while temperature, conductivity, total alkalinity and ammonium-N showed positive correlation. The phytoplankton also exhibited positive correlation with primary production. The PIR ratio ranged between 1.79 and 2.91, indicating a high degree of self maintenance of the system. The solar energy conversion efficiency through photosynthesis ranged between 0.17 % and 1.08 % in the first year and 0.09 % and 0.05 % in the second year. Annual average assimilation efficiency ranged between 37.32 % and 56.58 %.