INDIAN HYDROBIOLOGY, VOL.2 No.2, JANUARY, 1998.
LIMNOLOGICAL STUDY OF A SHALLOW WATER BODY (KOLOVOI LAKE) IN TAMILNADU - A. SREENIVASAN, K. VENKATANARASIMHA PILLAI AND T. FRANKLIN. - PP.61 -69.
Abstract: The hydrological features, plankton and fish yield in a shallow water body "Kolovai Lake" is described. Submerged and floating vegetation is abundant. Diurnal migration of plankton is noted. This is moderately hard water with a high organic content. Primary production of plankton is not high in comparison to other water bodies in Tamil Nadu. Fish production is not high and suggestions are made to increase this by stocking macrophage and detritivore species.
A STUDY ON WATER QUALITY OF THIRUPPARANKUNDRAM TEMPLE TANKS OF MADURAI CITY, SOUTH INDIA, - N. KRISHNAN, S. DINAKARAN, P. MURUGAVEL AND N. KUMARASWAMY,Zoological Research Laboratory, Madura College, Madurai - 625 011.
Abstract: Seasonal variation in water quality of the Thirupparankundram temple tanks (Saravana Poighai and Lakshmi Theertham) Madurai, South India was studied during 1993-94 by estimating water quality index (WQI). Hydrogen ion concentration (pH), total dissolved solids (TDS) and chloride content (CL) were selected as principal parameters from the view of quality of potable water. The quality of water is bad during summer (WQI =119.9) as well as monsoon season (WQI=106.3) in Lakshmi Theertham while during monsoon alone (WQI=113.8) in Saravana Poighai. The results are discussed as a function of natural hydro biological processes as well as man-made impacts on chosen temple tank ecosystems.
MONSOONAL IMPACT ON NUTRIENT DISTRIBUTION IN THE COASTAL WATER OF TAMILNADU, INDIA. - C. GOVINDASAMY AND JAYAPAUL AZARIAH, Department of Zoology, University of Madras, Guindy Campus, Chennai - 600 025, India.
Abstract: Assessment of damage in the coastal environment, due to the fast advancement of various industries, is a necessity. Seasonal variation in hydrological variables and dissolved inorganic nutrients such as PO4, NO3-N, NO2-N and SiO2-Si were studied in coastal water biotopes of coastal zone of Tamilnadu viz., I. Madras, II. Nagapattinam and III.Tuticorin. At all the stations, surface water temperatures varied from 26.50 to 38.50 Deg.C. Light extinction co-efficient increased from summer to monsoon and decreased from post monsoon to next summer. Salinity showed bimodal type of oscillation. Hydrogen ion-concentration of water fluctuated every month, following no definite seasonal pattern at both stations but remained alkaline throughout study. Dissolved oxygen content was high during the monsoon season. In the coastal environment PO4-P concentration varied from 0.25 to 4.00 然, NO3-N from 3.21 to 19.00, 然, NO2-N from 0.10 to 4.90, 然 and SiO3-Si recorded coastal waters were 4.00, 然, 19.00, 然, 4.90, 然 and 71.50, 然 at station I, during the monsoon season. The lowest concentrations of PO4-P, NO3-N and SiO3-Si were recorded during the post monsoon and summer seasons at all the stations. There is "export" of dissolved nutrients from the industrial and municipal sources to the adjacent marine waters at station.I. Further, the monsoonal impact is seen on the lowering of surface water temperature bringing about biogenic turbidity, reducing salinity, and increasing the dissolved oxygen and nutrient (PO4-P, NO3-N, NO2-N and SiO3-Si).
ON THE TROPHIC STATE AND POLLUTION INDEX OF TWO SMALL TROPICAL ROCK POOLS, - R. MARIMUTHU, Reader and Head, Department of Botany, Govt. Arts College, Dharmapuri - 636 705, Tamil Nadu, India, V. Krishnammurthy, Krishnamurthy Institute of Algology, 15, Ramanathan Street, Chennai - 600 017. -p 81 - 91.
Abstract: Phytoplankton ecology of two small rock pools located at Thiruchengode hill (11 Deg 45' and 11 Deg 30' N. lat. and 77 Deg.45' and 78 Deg.0' E. long) was studied for two years on fortnightly basis. Nygaard's phytoplankton quotient and Palmer's pollution index were calculated individually for each sampling date from the phytoplankton data averaged for the water bodies. The phytoplankton quotients indicate that the two pools are highly eutrophic. Considered on the basis of pollution index, the pool harbouring more number of desmid species is more "polluted' than the other. The limitations of using the phytoplankton quotients and pollution indices in characterising a water body are discussed.
DISTRIBUTION OF MARINE ALGAE ON THE SHORES OF IDINTHAKARAI, SOUTH INDIA. II A ONE YEAR STUDY OF SUCCESSION IN A BELT TRANSECT. - S. SASIDHARAN AND V. KRISHNAMURTHY, C.A.S. in Botany, University of Madras, Chennai - 600 025 - p. 93 - 100.
Abstract: Detailed Studies On Belt Transect II. After the preliminary survey on the vertical distribution of algae in the four different stations in October, 1983, by the belt transects, I, II, IV an intensified study was made to investigate the month-wise changes in the distribution of marine algae on one selected transect, viz., belt transect II. The observation were started from November 1983 and ended by October 1984. The results of these twelve months observations on the belt transect Ii are presented below:
Fig.17 represents the vegetation map of Belt transect - II from November 1983 to October 1984. For explanation of symbols, reference may be made to part I of this paper published in IH Vol. 2 No.1. Each of these figures represents sections of the belt transect from supra tidal to sub tidal zones.
DISTRIBUTION OF MARINE ALGAE ON THE SHORES OF IDINTHAKARAI, SOUTH INDIA.III DETAILED STUDIES ON SOME QUADRATS AND DISCUSSION. - S. SASIDHARAN AND V. KRISHNAMURTHY - C.A.S. in Botany, University of Madras, Chennai - 600 006. - pp. 101 - 132.
Abastract: Detailed observations were extended to investigate the month to month changes in a few selected quadrats. These included three permanent quadrts (Quadrat 2,3 and 18) one natural barren rock (Quadrat 11), six freshly fallen rock surfaces (Quadrat 15,16,22,23,24 and 25). One rocky surface (Quadrat 19) as studied intensively for two months and then denuded of vegetation to study the succession of vegetation at the concerned region of the shore.