Abstracts
Characteristics of the monsoonal bloom of phytoplankton at Orissa Coast in the Bay of Bengal were studied through bimonthly observation from April 2001 to December 2002. Three photosynthetic pigments chlorophyll-a (Chl a), chlorophyll-b (Chl b) and carotenoid (Car) were analyzed by absorption spectroscopic method. The seasonal variation of Chl a included phytoplankton bloom in the coastal area during monsoon period. The water column integrated Chl a reached to 68 mg m−2 at the station-1(St1), and amounted to 20 mg m−2 at 30 km off the river mouth during August 2001. In contrast the same amount was found at 15 km off the Mahanadi river mouth during August 2002. Salinity during this period varied from 5 psu at the St1 to 27 psu at the edge of the bloom area. The total amount of river discharge in the monsoon period calculated from daily river discharge data reported by Water Resources Department in India was 84 × 109 m3 during 2001 and 20 × 109 m3 during 2002. Both nitrate and phosphate concentrations showed negative quadratic relationship with salinity throughout the observation period. Extrapolated nitrate and phosphate concentration discharge from the Mahanadi river were 10.8 and 4 μg-at l−1, respectively. Microscopic identification revealed dominance of fluvial Chlorophyceae and diatoms during the monsoon period showing influence of the freshwater discharge.
Similar content being viewed by others
References
Akpan, E. R., & Offen, J. O. (1993). Comparison of chlorophyll a and carotenoids as Predictors of phytoplankton biomass in the cross river system of Nigeria. Indian Journal of Marine Science, 22, 59–62.
Balachandran, V. K., Rajagopalan, M. S., & Pillai, V. K. (1984). Chlorophyll a and phaeopigment as of indices biological productivity in the inshore surface waters of cochin. Indian Journal of Marine Science, 36, 227–237.
Bharali, B., Rath, S., & Sarma, R. (1991). A brief review of Mahanadi delta and deltaic sediments in Mahanadi basin. Memoirs of Geological Society of India, 22, 31–49.
Bhunia, A. B., & Choudhury, A. (1982). Primary production of the estuarine water around Sagar Isl/`1and, Sunderbans. Indian Journal of Marine Science, 11, 87–89.
Chandran, R. (1985). Seasonal and tidal variations of phytoplankton in the gradient zone of the Veller estuary. Mahasagar, 18, 37–48.
Chandran, R., & Ramamoorthi, V. (1984). Hydro-biological studies in the gradient zone of the Vellar estuary. Mahasagar – Bulletin of the National Institute of Oceanography, 17, 69–78.
Choudhary, S. B., & Panigrahy, R. C. (1989). Occurrence Asterionella glacialis bloom in near shore water of Gopalpur Bay of Bengal. Indian Journal of Marine Science, 18, 204–206.
Christopher, J. G., Cullison, L. A., Koch, F., Harder, T. M., & Krause, J. W. (2005). Influence of freshwater flow, ocean exchange, and seasonal cycles on phytoplankton – Nutrient dynamics in a temporarily open estuary. Estuarine, Coastal and Shelf Science, 65, 275–288.
Devassy, V. P., & Bhattathiri, P. M. A. (1974). Phytoplankton ecology of Cochin water. Indian Journal of Marine Science, 3, 96.
Devassy, V. P., & Goes, J. I. (1988). Seasonal patterns of phytoplankton biomass and productivity in a tropical estuarine complex (west coast of India). Proceedings of the Indian Academy of Science, 99, 485–501.
Emmel, F. J., & Curry, J. R. (1984). The Bengal submarine for northeastern Indian Ocean. Geophysical Research Letter, 3, 99–124.
Fog, G. E., Riley, J. P., & Skirrow, G. (Eds.) (1975). In Chemical oceanography. New York: Academic (p. 386).
Gobler, C. J., Buck, N. J., & Renaghan, M. J. (2002). Impacts of nutrients and grazing Mortality on the abundance of Aureococcus anopha–gefferens during a New Brown tide bloom. Limnology & Oceanography, 47, 129–141.
Gomes, H. R., Goes, J. I., & Saino, T. (2000). Influence of physical processes and freshwater discharge on the seasonality of phytoplankton regime in the Bay of Bengal. Continental Shelf Research, 20, 313–330.
Gouda, R., & Panigrahy, R. C. (1996). Ecology of phytoplankton in coastal waters off Gopalpur, east coast of India. Indian Journal of Marine Science, 25, 81–84.
Gowda, G., Gupta Rajesh, T. R. C., Gowda, K. M. H., Lingadhal, C., & Ramesh, A. M. (2002). Distribution of phytoplankton pigments in the Nethravathi estuary. Indian Journal of Fisheries, 49, 267–273.
Jeffrey, S. W., & Humphrey, G. F. (1975). New spectrophotometric equations for determining chlorophylls a, b, c 1 and c 2 in higher plants, algae and natural phytoplankton. Biochemie und Physiologie der Pflanzen, 167, 191–194.
Jochem, F. J. (2003). Photo- and hetrotrophic pico- and nano plankton in the Mississippi River plume: distribution and grazing activity. Journal of Plankton Research, 25, 1201–1214.
Laviolette, P. E. (1967). Temperature, salinity and density of the worlds sea: Bay of Bengal and Andaman sea. Informal Report no. 67-57. Washington, DC: Naval Oceanographic Office.
Lehman, P. W. (1981). Comparison of chlorophyll a and carotenoid pigments as predictors of phytoplankton biomass. Marine Biology, 65, 237–244.
Lewis, E. L., & Perkin, R. G. (1978). Salinity its definition and calculation. Journal of Geophysical Research, 83, 478.
Murphy, J. J., & Riley, P. (1962). A modified single solution method for the determination of phosphate in natural waters. Analytica Chimica Acta, 27, 31–36.
Patra, B. P. (1990). On some species of Coniopteris occurring in the Athgarh Sandstone, Cuttack district, Orissa. In Proceedings of the 77th Indian Science Congress, Cochin, Vol. 3, pp. 30–31.
Sarkar, B. L., Nair, G. B., Bannerjee, A. K., & Pal, S. C. (1985). Seasonal distribution of Vibrio parahaemolyticus in freshwater environments and in association with freshwater fishes in Calcutta. Applied Environmental Microbiology, 49, 132–136.
Shetye, S. R., Shenoi, S. S. C., Gouveia, A. D., Miche, G. S., Sunder, D., & Nampoothri, G. (1991). Wind-driven coastal upwelling along the western boundary of the Bay Bengal during the southwest monsoon. Continental Shelf Research, 11, 1397–1408.
Steeman, N. E. (1975). Marine photosynthesis with special emphasis on ecological aspects. Amsterdam: Elsevier (p. 185).
Umani, S. F., & Beran, F. (2003). Several variations in the dynamics of microbial plankton communities. First estimates from experiments in the Gulf of Trieste, Northern Adriatic Sea. Limnology and Oceanography, 247, 1–16.
Wood, E. D., Armstrong, F. A., & Richards, F. A. (1967). Determination of nitrate in sea water by cadmium–copper reduction to nitrate. Journal of the Marine Biological Association of the United Kingdom, 47, 23–31.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mishra, R.K., Shaw, B.P., Sahu, B.K. et al. Seasonal appearance of Chlorophyceae phytoplankton bloom by river discharge off Paradeep at Orissa Coast in the Bay of Bengal. Environ Monit Assess 149, 261–273 (2009). https://doi.org/10.1007/s10661-008-0200-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10661-008-0200-2