Statistical Approach in Assessing Dynamic Variations of Estuarine Water Quality of Dhamra, Bay of Bengal
Multivariate statistical techniques such as cluster analysis (CA), principal component analysis (PCA) and factor analysis (FA) were applied for the evaluation of dynamic variations in water quality of Dhamra estuarine region from 2009 to 2010. The concentrations of salinity, conductivity, turbidity and inorganic nutrients varied significantly in different seasons from estuarine region to deep marine region. The intensity of microbial activities and the influx of organic sewage are reflected in high BOD content. A strong positive correlation of salinity with conductance, chlorophyll-a with total phytoplankton, phytoplankton with inorganic phosphate and total viable count (TVC) with temperature have been established. Further, TVC was having negative correlation with salinity. Hierarchical cluster analysis, grouping 14 parameters into two significant clusters based on their similarity and their interrelationship identified phosphate as the major nutritional requirement for phytoplankton growth. The factor loading further indicates the influence of salinity gradient and nutrient availability for the distribution plankton. FA generates six latent factors explaining 82.67% of the total variance illustrating various interrelationships of biotic and abiotic factors.
Ananthan, G. (1994). Plankton ecology and heavy metal studies in the marine environments of Pondicherry India. Ph.D. Thesis, Annamalai University, India.
APHA (1998). Standard methods for examination of water and wastewater. American Public Health Association, New York.
Aston, S.R. (1980). Nutrients dissolved gases and general biochemistry in estuaries. In: E. Olausson and I. Cato (Eds.), Chemistry and biogeochemistry of estuaries. Wiley, New York.
Bragadeeswaran, S., Rajasegar, M., Srinivasan, M. and U. Kanaga Rajan (2007). Sediment texture and nutrients of Arasalar estuary, Karaikkal, south-east coast of India. Journal of Environmental Biology, 28: 237-240.
Brando, V., Dekker, A., Marks, A., Quin, Y. and K. Oubelkheir (2006). Cholorophyll and suspended sediment assessment in a macrotidal tropical estuary adjacent to the Great Barrier Reef: Spatial and temporal assessment using remote sensing. Cooperative Research Centre for Coastal Zone, Estuary & Waterway Management Technical Report, 74.
Choudhury, S.B. and R.C. Panigrahy (1991). Seasonal distribution and behaviour of nutrients in the creek and coastal waters of Gopalpur, east coast of India. Mahasagar - Bull. Natl. Inst. Oceanogr, 24: 81-88.
Das, J., Das, S.N. and R.K Sahoo (1997). Semidiurnal variation of some physicochemical parameters in the Mahanadi Estuary, east coast of India. Indian Journal of Marine Science, 26: 323-326.
De Souza, S.N. (1983). Study on the behaviour of nutrients in the Mandovi estuary during premonsoon. Estuarine, Coastal and Shelf Science, 16: 299-308.
Ghavzan, N.J., Gunale, V.R. and R.K. Trivedy (2006). Limnological evaluation of an urban fresh water river with special reference to phytoplankton. Pollution Research, 25(2): 259-268.
Gibson, R.N. (1982). Recent studies on the biology of intertidal fishes. Oceanogr. Mar. Biol. Ann. Rev., 20: 363-414.
Govindasamy, C., Kannan, L. and J. Azariah (2000). Seasonal variation in physico-chemical properties and primary production in the coastal water biotopes of Coromandel coast, India. Journal of Environmental Biology, 21: 1-7.
Gowda, G., Gupta, T.R.C., Rajesh, K.M., Gowda, H., Lingadhal C. and A.M. Ramesh (2001). Seasonal distribution of phytoplankton in Nethravathi estuary, Mangalore. Journal of Marine Biological Association, India, 43: 31-40.
Garnier, J., Billen, G. and Palfner, L. (2000). Understanding the oxygen budget and related ecological processes in the river Mosel: The Riverstrahler approach. Hydrobiologia, 410: 151-166.
Grasshoff, K., Ehrhardt, M. and K. Kremling (1999). Methods of Seawater Analysis.
Hemalatha, A. (1996). Studies on Benthos from a shrimp farm and in Velar estuary, Paragipattai. M. Phil. Thesis, Annamalai University, India.
Huang, J., Ho, M. and P. Du (2011). Assessment of temporal and spatial variation of coastal water quality and source identification along Macau peninsula. Stoch Environmental Research & Risk Assessment, 25: 353-361.
Jeffrey, S.W. and G.F. Humphrey (1975). New spectrophotometric equations for determining chlorophylls a, b, and c, in higher plants, algae and natural phytoplankton. Biochem. Physiol. Pflanzen, 167: 191.
Jickells, T.D. (1998). Nutrient biogeochemistry of the coastal zone. Science, 281: 217-222.
Kannan, L. and K. Vasantha (1992). Micro phytoplankton of the Pichavaram mangroves, southeast coast of India. Species composition and population density. Hydrobiology, 247: 77-86.
Kathiresan, K. and B.L. Bingham (2001). Biology of mangroves and mangrove ecosystems. Advanced Marine Biolology, 40: 81-251.
Lakshmanan, P.T., Shynamma, C.S., Balchand, A.N. and P.N. Nambisan (1987). Distribution and variability of nutrients in Cochin Backwaters south-west coast of India. Indian Journal of Marine Science, 16: 99-102.
Liu, C.W., Lin, K.H. and Y.M. Kuo (2003). Application of factor analysis in the assessment of groundwater quality in a Blackfoot disease area in Taiwan. Science in the Total Environment, 313: 77-89.
Muduli, B.P. and C.R. Panda (2010). Physico-chemical properties of water collected from Dhamra estuary. International Journal of Environmental Sciences, 1(3).
NRC (National Research Council) (2000). Clean coastal waters: Understanding and reducing the effect of nutrient pollution. National Academy Press, Washington, DC.
Panda, D.K., Tripathy, D.K., Choudhury S.B., Gouda, R. and R.C. Panigrahy (1989). Distribution of nutrients in Chilka lake, east coast of India. Indian Journal of Marine Science, 18: 288.
B.B. and D. Bhatta (2006). Application of factor and cluster analysis for characterization of river and estuarine water systems – A case study: Mahanadi river (India). Journal of Hydrology, 331: 434-445.
Qasim, S.Z. (1977). Biological productivity of the Indian Ocean. Indian Journal of Marine Sciences, 6: 122-137.
Rajasegar, M. (2003). Physico-chemical characteristics of the Vellar estuary in relation to shrimp farming. Journal of Environmental Biology, 24: 95-101.
Rajesh, K.M., Mendon, M.R. and V. Hariharan (2000). Seasonal distribution and behaviour of nutrients with reference to tidal rhythm in the Mulki estuary, southwest coast of India. Journal of Marine Biological Association, India, 42: 21-31.
Ramnathan, AL. (1997). Sediment characteristics of the Pitchavaram mangrove environment, southeast coast of India. Indian Journal of Marine Sciences, 26: 319-322.
Saravanakumar, A., Rajkumar, M., Sesh Serebiah, J. and G.A. Thivakaran (2008). Seasonal variations in physico-chemical characteristics of water, sediment and soil texture in arid zone mangroves of Kachchh-Gujarat. Journal of Environmental Biology, 29(5): 725-732.
Seenivasan, R. (1998). Spectral reflectance properties of the Vellar estuarine environment, southeast coast of India. M.Phil. Thesis, Annamalai University, India.
Segar, K. and V. Hariharan (1989). Seasonal distribution of nitrate, nitrite, ammonia and plankton in effluent discharge area of Mangalore, West coast of India. Indian Journal of Marine Sciences, 18: 170-173.
Senthilkumar, S., Santhanam, P. and P. Perumal (2002). Diversity of phytoplankton in Vellar estuary, Southeast coast of India. The 5th Indian fisheries Forum Proceedings (Eds: S. Ayyappan, J.K. Jena and Mohan Joseph). AFSIB, Mangalore and AeA, Bhubaneswar, India.
Sundararaj, V. and K. Krishnamurthy (1975). Nutrients and Plankton in Backwater and Mangrove Environment. N. Natarajan (Ed.). Recent Researches in Estuarine Biology, 273-390.
Sundaray, S.K., Panda, U.C., Nayak, B.B. and D. Bhatta (2006). Multivariate statistical techniques for the evaluation of spatial and temporal variations in water quality of the Mahanadi river-estuarine system (India) – A case study. Environmental Geochemistry and Health, 28: 317-330.
Thangaraj, G.S. (1985). Ecobiology of the marine zone of the Velar estuary. Ph.D. Thesis, Annamalai University, India.
Trivedy, R.K. and P.K Goel (1984). Chemical biological methods for water pollution studies. Env. Pub. Karad, India.
Utermohl, H. (1958). Zur Verwollkommnung der quantitativen phytoplankton-methodik. Mitt. Int. Ver. Limnol., 9: 1-38.
Zepp, R.G. (1997). Interactions of marine biogeochemical cycles and the photo degradation of dissolved organic carbon and dissolved organic nitrogen. In: A. Gianguzza, E. Pelizzetti, and S. Sammarkano (Eds), Marine chemistry, Kluwer, London.