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Effect of Some Physico-chemical Factors of Water on the Growth and Abundance of Phytoplankton

M. Ahsan-Bin-Habib
Department of Fisheries Biology and Limnology, Bangladesh Agricultural University, Mymensingh.

M. Mohsinuzzaman
Department of Fisheries Biology and Limnology, Bangladesh Agricultural University, Mymensingh.

MM. Aminul Islam
Department of Fisheries Biology and Limnology Bangladesh Agricultural University,Mymensingh.

M. Fazlul Awal Mollah
Department of Fisheries Biology and Limnology Bangladesh Agricultural University, Mymensingh.

M. Ahsan-B M. Shahidur Rabma
Department of Fisheries Biology and Limnology Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

The growth and abundance of 17 genera of phytoplankton throughout the study were correlated with some physicochemical factors of water which has been observed through multiple correlation analysis. The growth of Anabaena (6.25%) was significantly influenced by transparency, temperature. pH, hardness. dissolved 02 and free CO₂ of water which contributed 85.57%.oftotal analyzes. Again. the .significant (P O.OS) combined effects of NOa"-N. POi.P, exchangeable K, Ca, Mg and Na contributed 86.23%.87.45%. 85.91%.83.52% and 85.00% of total analyzes in case of Pedialtrum (1.28%). scenedesmus netlesmlls t: (0.09% ). Closterium, (a 30% ). Cyelotella (0.14%) aDd Nostoe (' ( 0.94% ). respectivIy aod again the significant (P. <0.01) combined effects of the same contributed 93.37% of total analyse, in Case of growth of Euglena (0.83 % ). Pediastrum directly with pH and hardness, scenedesmus and Closterillm inversely with exchangeable Na and Diatoma directly with exchangeable Na were significantly (P .0.01) correlated • ., Ankistrodesmur[ had directly stro!). (p.O.OOl) correlation with Ulothrix and Phacus, Again. Closterium and Navicula was directly and strongly (P 0.001) correlated with Phacus and Pinnularia, respeciively. Ankislrod,smuJ with C/oslerium, Ulothrix with Closttrium an d Phacus, Volvox with Phacus, Navicula with Euglena. MierocYJtis and Euglena with Phacus were directly and highly ( P 0.01 ) correlated.

Keywords: Effect,Physio chemical, Water, Growth,Phytoplankton

Location: BAU, Mymensingh.

Start Date: 00-09-1979

End Date: 00-09-1980

Program Area: Crop-Soil-Water Management

Commodity: Plankton

Objectives:

To study the effects of important physico-chemical factors of water on the growth and abundance of phytoplankton, interaction between them and inter. generic correlation of phytoplankton.

Methodology:

The pond was selected inside the Bangladesh Agricultural University, Mymensingh, for a period of months from September 1979 to September 1980, with break in the months of February, March and April 1980. The pond was Limped, covered an area of 8.0 acres ( approximately)and was more or less surrounded by, student's Halls of residence. A drain from one of the Halls was found to open into the pond. The northern part of the pond was re excavated during spring, 1978. The water was bluish in colour and al most free from aquatic vegetation except very few in the shallower bank areas. No inorganic or organic fertilizer was used during study. The main source of water was rainfall.

Source of Information: Bangladesh J. Agril. Sci, 11 (2) ; 187-195 : 1984 ISSN 0379-4296

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The growth of Anabaena (6.25%) was significantly ( P '::;:0.05 ) influenced by transparency, temperature. pH, hardness. dissolved 02 and free CO2 of water which contributed 85.57%.oftotal analyzes. Again. the .ignificant (P O.OS) combined effects of NOa"•N. POi.P, exchangeable K, Ca, Mg and Na contributed 86.23%.87.45%. 85.91%.83.52% and 85.00% of total analyzes in case of Pedialtrum (1.28%). scenedesmus netlesmlls t: (0.09% ). Closterium, (a 30% ). Cyelotella (0.14%) aDd Nostoe (' ( 0.94% ). respectivIy aod again the significant (P. <0.01) com. bined effects of the same contributed 93.37% of total analyze, in Case of growth of Euglena (0.83 % ). Pediastrum directly with pH and hardness, scenedesmus and Closterillm inversely with exchangeable Na and Diatoma directly with exchangeable Na were significantly (P .0.01) correlated • ., Ankistrodesmur[ had directly stro!). (p.O.OOl) correlation with Ulothrix and Phacus, Again. Closterium and Navicula was directly and strongly (P 0.001) correlated with Phacus and Pinnularia, respectively. Ankislrodesmus, with C/oslerium, Ulothrix with Closttrium an d Phacus, Volvox with Phacus, Navicula with Euglena. Mierocystisand Euglena with Phacus were directly and highly ( P 0.01 ) correlated

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