Environmental characterization of periphyton community
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Abstract
The present paper deals with the behavior of the Attached Microbial Community (AMC) for water self-purification at different riverbeds in a typical local river. The study quantitatively investigated the problem starting with in-situ sampling. It was found that more biomass of AMC was at riffles with wider distribution than in pools. High current velocity (HCV) plays a negative role at the initial stage of attachment on the riverbed, but HCV aids the community proliferation after stable attachment. External disturbances such as rainfalls and discharges from dams or reservoirs would detach the periphyton depending on the intensity of turbulence in water. However, it was discovered that the flock of periphyton could be restored very quickly because it was not completely removed. Thus, in order to enhance self-purification by periphyton, a suitable configuration of the riverbed must be constructed, and occasional appropriate repair along the channels would improve the decontamination of the river.
Key words
periphyton riffle pool riverbed self-purificationPreview
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References
- AWWA and WPCF. 1985. Standard Method for the Examination of Water and Wastewater. 19th edition, APHA, Washington DC, USA, 137 pp.Google Scholar
- Barica, J., 1990. Seasonal variability on N: P ratios in eutrophic lakes. Hydrobiology, 191: 97–103.CrossRefGoogle Scholar
- Ghosh, M., and J. P. Gaur, 1998. Current velocity and the establishment of stream algal periphyton communities. Aquat. Bot., 60: 1–10.CrossRefGoogle Scholar
- Godillot, R., B. Caussade, T. Ameziane, and J. Capblancq, 2001. Interplay between turbulence and periphyton in rough open-channel flow. J. Hydraul. Res., 39 (3): 227–239.CrossRefGoogle Scholar
- Horner, R. R., and E. B. Welch, 1981. Stream periphyton development in relation to current velocity and nutrients. Canadian J. Fish. Aquat. Sci., 38: 449–457.CrossRefGoogle Scholar
- Horner, R. R., E. B. Welch, M. R. Seeley, and J. M. Jacoby, 1990. Responses of periphyton to changes in current velocity, suspended sediment and phosphorus concentration. Fresh. Biol., 24: 215–232.CrossRefGoogle Scholar
- Korte, V. L., and D. W. Blinn, 1983. Diatom colonization on artificial substrata in pool and riffle stones studied by light and scanning electron microscopy. J. Phycol., 19: 332–341.CrossRefGoogle Scholar
- Lindstrom, E. A., 1996. The humic lake acidification experiment (HUMEX): Impacts of acid treatment on periphyton growth and nutrient availability in lake Skjervat-jern, Norway. Environ. Int., 22(5): 629–642.CrossRefGoogle Scholar
- Mosisch, T. D., and S. E. Bunn, 1997. Temporal patterns of rainforest stream epilithic algae in relation to flow-related disturbance. Aquat. Bot., 58: 181–193.CrossRefGoogle Scholar
- Neckles, H. A., E. T. Koepfler, L. W. Haas, R. L. Wetzel, and R. J. Orth, 1994. Dynamics of epiphytic photoautotrophs and heterotrophs in Zostera marina (Eelgrass) microcosms: responses to nutrient enrichment and grazing. Estuaries, 17(3): 597–905.CrossRefGoogle Scholar
- Redifield, A. C, 1958. The biological control of chemical factors in the environment. Am. Sci., 46: 205–221.Google Scholar
- Reynolds, C. S., 1984. The Ecology of Freshwater Phytoplankton. Cambridge University Press, Cambridge, 384 pp.Google Scholar
- Stelzer, R., J. Heffernan, and G. Likens, 2003. The in-fluence of dissolved nutrients and particulate organic matter quality on microbial respiration and biomass in a forest stream. Freshwater Biol., 48: 1925–1937.CrossRefGoogle Scholar
- Stevenson, R. J., 1983. Effects of current and conditions simulating autogenically changing micro-habitats on benthic diatom immigration. Ecology, 64: 1514–1524.CrossRefGoogle Scholar
- Sumita, M., and T. Watanabe, 1983. New general estimation of river pollution using new diatom community index (NDCI) as biological indicators based on specific composition of epilithic diatoms communities. Jpn. J. Limnol., 44: 329–340.Google Scholar