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Marine Algae of St. Martin's Island, Bangladesh. Xii. New Records of Red and Green Algae

Abdul Aziz
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh

Md. Towhidur Rahman
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

Ceramium tenerrimum (G. Martens) Okamura fa, Caulerpa sertularioides fa corymbosa Taylor and Cladophora vagabunda (L.) Hoek from St. Martin’s Island, Bangladesh have been recorded, and described and illustrated for the first time with descriptions and illustrations.

Keywords: Ceramium, Caulerpa, Cladophora, Red alga, Green algae, Bangladesh

Location: St. Martin’s Island, Cox’s Bazar, Bangladesh

Start Date: 00-00-1986

End Date: 00-00-1995

Program Area: Conservation and Biodiversity

Commodity: Agar

Objectives:

To determine the Marine Algae of St. Martin's Island, Bangladesh. Xii. New Records of Red and Green Algae

Methodology:

Marine algae collected on 6 January 1986 by Professor Syed Hadiuzzaman and on 1 March, 1995 by Professor Abdul Aziz, Department of Botany, University of Dhaka from the St. Martin’s Island, Cox’s Bazar, Bangladesh were considered. Location and method of preparation of samples are similar to those described in Aziz and Rahman (2010).

Source of Information: Bangladesh J. Bot. 40(1): 41-45, 2011 (June)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present material differs from C. tenerrimum described by Islam (1976, 60, PI, 54) by fewer nodal cells and shorter internodal cells and thus illustrated in this paper as a forma of the species. In our material, cortications were also absent in the internodes. So far, C. fastigiatum Harv., C. gracillimum Griff. et Harv. var. byssoideum (Harv.) G. Mazoyer, C. tenerrimum (G. Martens) Okamura and an unidentified species by Islam (1976); C. cruciatum Collins et Harv., C. fastigiatum fa. flaccidum (Pat) BØrg., C. maryae Weber van Bosse by Islam and Aziz (1987) and C. brevizonatum Peter. (Islam et al. 2002); C. brevizonatum var. caraibica Peter. et BØrg. by Islam et al. (2010) have been reported. The fronds in fa corymbosa described by Taylor (1960) produces 10 - 20 blades from a single base. Though the number of branches is only 6, the present material has been placed under fa corymbosa Taylor because the plant is still in a growing state. Caulerpa sertularioides fa typica BØrg. described and illustrated by Islam (1976) resembles to a large extent (rhythmic growth and proliferation of fronds) to C. sertularioides fa corymbosa Taylor and the presently described material. The fa typica BØrg. does not appear as a valid name in the algae database. Thus the material described by Islam (1976) and the present material is considered as C. sertularioides fa corymbosa Taylor. Thus including the present one the total number of taxa stands at 13 (Ahmed et al. 2008). The present material appears to agree well with C. vagabunda (L.) Hoek particularly because of the formation of a sort of bundle-like branched structure at the distal part, but gradually narrowed apex of branchlets and presence of imbricate structure lead us to consider it as this species. The whole branching pattern (imbricate) and cell shape and curvature of the distal part appeared at a glance like the distal part of Phylodictyon anastomosans (Harv.) Kraft et Wynne (Aziz et al. 2010) but axis with opposite branches are formed at the very base of the axis, in the present material. Islam (1976) reported C. echinus (Bias.) Kütz. and C. patentiramea (Mont.) Kütz., while Aziz et al. (2010) has recorded C. prolifera (Roth) Kütz. and C. crispula Vickers from the St. Martin's Island.

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