Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Ecology of Indian estuaries—V: Primary productivity of the Ashtamudi estuary, south-west coast of India

  • 49 Accesses

  • 4 Citations

Abstract

Primary productivity at four representative stations in the Ashtamudi estuary has been presented. The average gross and net productivities in the surface water was maximum at Neendakara, the bar mouth zone and minimum at Kadapuzha, the riverine zone consistently exposed to pollution from paper mill effluents. Ashtamudi, the station directly on the gradient line and Kanjirakode, the station equidistant from Kadapuzha and Ashtamudi presented a transition phase with regard to the primary productivity. In the bottom water also productivity was minimum at the polluted zone. Generally productivity at sub-surface levels was higher than that at the surface. A seasonal pattern, independent of various environmental parameters, was discernible both in the gross and net productivity changes at surface and sub-surface levels. High concentrations of dissolved oxygen, silicate and nitrite helped to maintain higher productivities at Neendakara, Ashtamudi and Kanjirakode on several occasions during the year. The fact that productivity at the polluted Kadapuzha station was the lowest, indicates that the paper mill effluent has considerably disturbed the productivity mechanism of this otherwise healthy ecosystem.

This is a preview of subscription content, log in to check access.

References

  1. Bhargava R M S 1973 Diurnal variation in phytoplankton of Mandovi estuary, Goa;Indian J. Mar. Sci. 2 27–31

  2. Bhargava R M S, Bhattathiri P M A and Devassy V P 1977 Relative contribution of nannoplankton to the primary production of two estuaries of Goa,Mahasagar 10 61–66

  3. Bhatnagar G P 1971 Primary organic production and Chlorophyll in Kiile backwater, Porto Novo, (S. India): InProceedings of the symposium on “tropical ecology with an emphasis on organic productivity” (ed) P M Golley and F B Golley (New Delhi: Mimeo) pp. 351–362

  4. Bhattathiri P M A, Devassy V P and Bhargava R M S 1976 Production at different trophic levels in the estuarine system of Goa;Indian J. Mar. Sci. 5 83–86

  5. Dehadrai P V 1970 Observations on certain environmental features at the Dona Paula point in Marmugao Bay, Goa;Proc. Indian Acad. Sci., (Anim. Sci.)B72 56–67

  6. Dehadrai P V and Bhargava RMS 1972a Seasonal organic production in relation to environmental features in Mandovi and Zuari estuaries, Goa;Indian J. Mar. Sci. 1 52–56

  7. Dehadrai P V and Bhargava R M S 1972b Seasonal organic production in relation to environmental features in Mandovi and Zuari estuaries, Goa;Indian J. Mar. Sci. 1 52–566

  8. Dunbar J 1979Marine production mechanisms. International Biological Programme 20 (Cambridge: University Press)

  9. Krishnamurthy K and Sundararaj V 1973 A survey of environmental features in a section of the Vellar— Coleron estuarine system, South India;Mar. Biol. 23 229–37

  10. Nair N B and Thampi D M 1980A text book of marine ecology (India: The Macmillan Company of India Ltd) p. 352

  11. Nair PVR 1970 Primary productivity in the Indian seas;Bull. Cent. Mar. Fish. Res. Inst. 22 1–56

  12. Nair PVR, Joseph K J, Balachandran V K and Pillai V K 1975 Study on the primary production in the Vembanad lake;Bull. Dept. Mar. Sci. Uni. Cochin. 7 pp. 161–78

  13. Pillai V K, Joseph K J and Nair A K K 1975 Plankton production in the Vembanad lake and adjacent waters in relation to the environmental parameters;Bull. Dept. Mar. Sci. Uni. Cochin 7 pp. 137–50

  14. Purushothaman A and Bhatnagar G P 1976 Primary production studies in Porto Novo Waters. S. India;Arch. Hydrobiol. 11 37–50

  15. Qasim S Z 1970 Some problems related to the food chain in a tropical estuary. InMarine food chains (ed) J H Stele Edinburg: Oliver and Boyd) pp. 45–51

  16. Qasim S Z 1979 Primary production in some tropical environments InMarine production mechanisms (ed) J Dunbar (Cambridge: University Press)

  17. Qasim S Z and Reddy C V G 1967 Estimation of plant pigments of Cochin backwater during the monsoon months;Bull. Mar. Sci. Gulf Carribb. 17 95–110

  18. Qasim S Z, Bhattathiri P M A and Abidi S A H 1968 Solar radiation and its penetration in a tropical estuary;J. Exp. Mar. Biol. Ecol. 2 87–103

  19. Qasim S Z, Bhattathiri P M A and Devassy V P 1972 The influence of salinity on the rate of photosynthesis and abundance of some tropical phytoplankton;Mar. Biol. 12 200–206

  20. Qasim S Z, Vijayaraghavan S, Joseph K J and Balachandran V K 1974 Contribution of microplankton and nannoplankton in the waters of tropical estuary;Indian J. Mar. Sci. 3 146–149

  21. Qasim S Z, Wellershaus S, Bhattathiri P M A and Abidi S A H 1969 Organic production in a tropical estuary;Proc. Indian Acad. Sci. (Anim. Sci.)B59 51–94

  22. Sankaranarayanan V N and Qasim S Z 1969 Nutrients of Cochin backwaters in relation to environmental characteristics;Mar. Biol. 2 236–247

  23. Snedecor G W and Cochran W G 1967Statistical methods (New Delhi: Oxford and IBH Publishing Co.) 6th edn p. 593

  24. Strickland J D H and Parsons T R 1972 A practical hand book of sea water analysis;Fish. Res. Bd. Canada Bull. 167

  25. Steeman Nielsen E 1963 Productivity definition and measurement. InThe sea. (ed) M N Hill (New York: Interscience) Vol.2. 129–164

  26. Subramanian B R and Venugopalan V K 1978 Diurnal variation in net phytoplankton and nannoplankton primary production and chlorophyll—a in the Vellar estuary;Indian J. Mar. Sci. 7 191–93

  27. Venugopalan V K 1969 Primary production in the estuarine and inshore waters of Porto Novo (11° 28′N-79° 49′E);Bull. Natl. Inst. Sci., India,38 Part II, pp. 743–746

  28. Vollenweider R A 1969A manual on methods for measuring primary production in aquatic environments. (Oxford and Edinburgh: IBP Handbook No. 12, Blackwell scientific publications) pp. 213

Download references

Author information

Correspondence to N Balakrishnan Nair.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Balakrishnan Nair, N., Abdul Azis, P.K., Dharmaraj, K. et al. Ecology of Indian estuaries—V: Primary productivity of the Ashtamudi estuary, south-west coast of India. Proc Ani Sci 93, 9–23 (1984). https://doi.org/10.1007/BF03186221

Download citation

Keywords

  • Gross productivity
  • net productivity
  • ecological factors
  • surface and bottom waters