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Some Freshwater Phytoplankton as New Reports and One New Forma from Bangladesh

Md. Almujaddade Alfasane
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

Md. Shafiqul Islam
Ansar Academy, Shafipur, Gazipur, Bangladesh

Moniruzzaman Khondker
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

Abstract/ Executive Summary:

Eight newly recorded taxa of freshwater phytoplankton from Bangladesh have been described in the present paper. Of these, 3 species are from Cryptomonadales, 2 species from each of Volvocales and Euglenales and one species from Chromulinales. In addition one new forma of Pediastrum duplex Meyen var. duplex fa. nagdaensis M.A. Alfasane, M.S. Islam & M. Khondker fa. nov. (Chlorococcales) has also been described in this account.

Keywords: Phytoplankton; Chlamydomonas; Pyramidomonas; Pediastrum; Epicystis; Chroomonas.

Location: Narayanganj, Dhaka, Pirojpur and Barisal districts, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Plankton

Objectives:

To determine the Some Freshwater Phytoplankton as new Reports and one new Forma from Bangladesh

Methodology:

Samples for the present paper were collected from 4 different places in Bangladesh. One of them is Buriganga River (near to Sikdar Medical College, Hazaribagh), Dhaka metropolis. In this place, the sampling station (Station 1) is located in the mid-part of the river. The second one is a polluted ditch of village Nagda, Narayanganj. Two other sampling stations are located in two domestic ponds of Pirojpur and Barisal districts (Khondker et al. 2006). Samples were obtained by sieving 100 L of sub-surface water through a plankton net having a mesh aperture of 20 µm. The concentrated plankton sample in the bucket of the plankton net were taken in a screw caped glass vial and fixed with Lugol's solution. Organisms were photomicrographed with the help of a Nikon Optiphot, UFX-11A microscope fitted with a Nikon FX-35WA camera, Japan. A total of eight taxa of freshwater phytoplankton have been identified as new reports for Bangladesh and one taxa has been described as new to science.

Source of Information: Bangladesh J. Plant Taxon. 17(1): 87-92, 2010 (June)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Recently a series of papers have been published where many taxa from different classes have been described and illustrated (Khondker et al., 2007a, b, c; 2008a, b; 2009). During the present study on some recent collections from different parts of the country planktonic algae of different orders have been found to occur which, could not be recorded earlier from the areas selected or any other parts of Bangladesh. So these could be considered as new records for Bangladesh. The recorded species belonged to the genera Chlamydomonas and Pyramidomonas under Volvocales, two taxa of Trachelomonas under Euglenales, Epicystis under Chromulinales and the rest three belonged to Chroomonas, Rhodomonas and Cryptomonas under Cryptomonadales.

Knowledge Management: Journal