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Presence of tropical hydrophytes in relation to limnological parameters- a study of two freshwater ponds in Kolkata, India

Published online by Cambridge University Press:  15 February 2009

G. Mukhopadhyay  and
A. Dewanji
G. Mukhopadhyay
Affiliation:
Agricultural and Ecological Research Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata - 700 108, India
A. Dewanji
Affiliation:
Agricultural and Ecological Research Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata - 700 108, India
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Abstract

The presence of different species of hydrophytes was investigated in relation to Secchi disk visibility, pH, dissolved oxygen,electrical conductivity, total Kjeldahl nitrogen, total phosphorus and chlorophyll-a concentration in two tropical ponds nearbyKolkata, India, during a three years period (June 1999 to May 2002). The dominant flora in the ponds namely, Alternantheraphiloxeroides, Nymphoides hydrophylla, Lemna aequinoctialis, and Vallisneria spiralis were found to subsist over a wide amplitudeof nutrient levels thereby showing their adaptability to highly eutrophic ecosystems, a common feature of the tropics.However, the presence of some minor species could be associated with a narrow range of specific limnological variables.

Keywords

Hydrophytesnitrogenphosphorusminor floratropical ponds
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 41 , Issue 4 , December 2005 , pp. 281 - 289
Copyright
© Université Paul Sabatier, 2005

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