2SAMPATH KUMAR. S., 2HARIPRASAD. P and 1RAMAKRISHNAN. N

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Presentation transcript:

2SAMPATH KUMAR. S., 2HARIPRASAD. P and 1RAMAKRISHNAN. N STUDY ON THE EFFECT OF SOME SELECTED HEAVY METALS ON THE PRIMARY PRODUCTION IN FRESH WATER POND AT TIRUVANNAMALAI, TAMIL NADU. 2SAMPATH KUMAR. S., 2HARIPRASAD. P and 1RAMAKRISHNAN. N Department of Natural Science, Govt. Arts College, Tiruvannamalai- 3, Tamil Nadu

Location of the Study Site The experimental ponds selected for this study are situated inTiruvannamalai (12o 15’ NL and 79o 07’ EL). Both the ponds are eutrophic in nature with a dominance of Cyanophyceae during the study period.

HEAVY METAL The following four heavy metals were selected Lead (Pb), Copper (Cu), Cadmium (Cd) and Zinc (Zn) for the present investigation. The GR - grade of various metal salts used were lead nitrate, Copper Sulphate, Cadmium chloride and zinc chloride.

A total of 61 algal taxa were identified in the pond I and 71 taxa were identified from the pond II, which were distributed over four classes of algal divisions such as Chlorophyta, Bacillariophyta, Euglenophyta and Cyanophyta.

The physicochemical characters of the water bodies during the experimental period Parameters POND I POND II First exp. Results Second exp. Results Water Temp. 28.10 28.65 29.21 28.5 PH 8.1 8.21 7.85 7.65 Transparency 20.65 21.25 19.85 20.2 DO2 19.7 20.6 18.8 21.5 Total solids 110.5 96.2 88.65 92.8 Total alkalinity 126.5 132.6 128.5 130.6 Calcium 18.25 16.5 25.2 24.2 Magnesium 19.6 22.65 20.35 21.6 Silicate 6.45 5.8 7.2 6.1 Phosphate 5.1 4.8 5.3 4.3

PHYTOPLANKTON DIVERSITY IN MAJOR ALGAL DIVISIONS DURING THE EXPERIMENT IN POND I

PHYTOPLANKTON DIVERSITY IN MAJOR ALGAL DIVISIONS DURING THE EXPERIMENT IN POND II

PHYTOPLANKTON DENSITY DURING THE EXPERIMENT PERIOD

EFFECT OF ZINC ON GPP

EFFECT OF CADMIUM ON GPP

EFFECT OF LEAD ON GPP

EFFECT OF DIFFERENT CONCENTRATIONS OF COPPER ON GPP (mgC/m3/hr)

EFFECT OF VARIOUS CONCENTRATIONS OF HEAVY METALS ON COMMUNITY NPP IN POND I

EFFECT OF VARIOUS CONCENTRATIONS OF HEAVY METALS ON COMMUNITY NPP IN POND II

Correlation matrix between the heavy metal effect on GPP in the Pond I and II Variable ZN_PII CD_PII PB_PII CU_PII ZN_PI CD_PI PB_PI CU_PI 1.0000 .98630 .98750 .98991 .98271 .97402 .99351 .99646 .98349 .98607 .98635 .97538 .97036 .96968 .95357 .96209 .98526 .98091 .99592 .99864 .98812 .95929 .98727 .98621 .99719 .99622 .99030 .96414 .99904 ZN_PII – Effect of Zinc on GPP in Pond II; CD_PII – Effect of Cadmium on GPP in Pond II PB_PII – Effect of Lead on GPP in Pond II; CU_PII – Effect of Cupper on GPP in Pond II ZN_PI – Effect of Zinc on GPP in Pond I; CD_PI – Effect of Cadmium on GPP in Pond I PB_PI – Effect of Lead on GPP in Pond II; CU_PI – Effect of Cupper on GPP in Pond I

Thank you.