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Ecology, Morphology and Anatomy of Aldrovanda Vesiculosa L. (droseraceae) from Bangladesh

M ZAMAN
Phycology and Limnology Laboratory, Department of Botany, University of Rajshahi,Rajshahi-6205, Bangladesh

ATM NADERUZZAMAN
Phycology and Limnology Laboratory, Department of Botany, University of Rajshahi,Rajshahi-6205, Bangladesh

MEHEDI HASAN
Phycology and Limnology Laboratory, Department of Botany, University of Rajshahi,Rajshahi-6205, Bangladesh

SABRINA NAZ
Phycology and Limnology Laboratory, Department of Botany, University of Rajshahi,Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Ecology, morphology and anatomy of Aldrovanda vesiculosa L. collected from Chalan beel wetland of Rajshahi district in 1987 were studied. An illustrated account presented with a review of literature. The limnological data were obtained from the spot of collection of A.vesiculosa and the angiosperms were collected from the whole wetland zone. The physical, chemical and biological data clearly indicate the drastic changes in aquatic ecology of the Aldrovanda habitat. The redox characteristics including the DO, BOD, COD, Eh, rH2 indicated that, in 1987 the beel (wetland) water had minimum organic load which was supported by the lower value of electrolytic conductivity.

Keywords: Aldrovanda vesiculosa L., Carnivor, Ecology, Morphology, Chalan Beel, Bangladesh

Location: Chalan beel wetland of Rajshahi district

Start Date: 00-00-1987

End Date: 00-00-1987

Program Area: Conservation and Biodiversity

Non-commodity: Plant(s)

Objectives:

To study and evaluate morphology, ecology and distribution of A. vesiculosa.

Methodology:

Chalan beel is one of the largest wetland in Bangladesh and lies between 23º24′ to 24º35′ N and 89º05′ to 89º18′ E and 10 m above the sea level. An area of 1,07,500 ha is presently reduced to about 26,000 ha of which about 2000 ha retains water in summer till the next monsoon. The rest of the area had been reclaimed for rice cultivation. The plant was collected from a marsh land 10 Km east of Rajshahi in 1974 by a group of Botanists from Dhaka University and Rajshahi University. The plant was collected again in 1987 from Chalan beel wetland 50 Km east of Rajshahi, during a regular phycological and limnological investigations. The plant material was collected by using hand net from deep clear water shaded by reeds and thickets of Nymphaea, Ricciocarpus natans L. and Riccia fluitans L. The specimen were preserved in 4% formalin solution and kept in the Phycology and Limnology Laboratory, Department of Botany, University of Rajshahi, Bangladesh. pH, Redox potential, Conductivity and DO of the water body were measured using relevant meters and other chemical conditions were determined by following standard methods. Necessary microscopic studies, camera lucida drawings and photography have been made in the laboratory.

Source of Information: Bangladesh J. Bot. 40(1): 85-91, 2011 (June)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The water was unpolluted and eutrophic in nature. The abundance of phytoplankton, zooplankton and other hydrophytes also support this fact.

Knowledge Management: Journal