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Regeneration Study of the Major Mangrove Species in the Sundarbans .

Dr.M. M. Rahman
Divisional Officer
Mangrove Silviculture Division, Bangladesh Forest Research Institute, Muzgunni, Khulna-9000

P. Nandy
Divisional officer
Mangrove Silviculture Division, Bangladesh Forest Research Institute, Muzgunni, Khulna-9000

. S. M. Hasnin
Senior Research officer
Mangrove Silviculture Division, Bangladesh Forest Research Institute, Muzgunni, Khulna-9000

Dr.A.S. M. Helal Siddiqui
Senior Research Officer
Mangrove Silviculture Division, Bangladesh Forest Research Institute, Muzgunni, Khulna-9000

Abstract/ Executive Summary:

The Sundarbans is completely depended on natural regeneration. The natural regeneration is essential to conserve the diversified biological resources of the Sundarbans. A number of factors, both biotic and abiotic, may be responsible for seedling recruitment and their survivability. The environmental factors in the Sundarban are changing day by day that ultimately influences the natural regeneration. Data on species composition, dia-class, height class, regeneration data, growth data, salinity and siltation data were collected and analyzed from the established 27 permanent sample plots (PSPs) at different locations throughout the Sundarbans. Therefore, it is very much essential to study the status of natural regeneration in this dynamic forest as first priority basis for proper management, sustainable production of the forests and protection of the lives and property of the people living in the coastal areas of the Sundarbans from cyclone and tidal bores. The regeneration status differ from place to place in different salinity zones of the Sundarbans.

Keywords: Climate change,Forest management, Mangrove, Regenerarion status, Sundarbans,

Location: All over the Sundarbans Reserved Forest like-Terabeka, Bhola river, Kotka, Supati, Panirgat, Charaputia, Bhadra, Kalabogi, Baniakhali, Kasiabad, Bojboza, Khashitana, Andermanik, Gewakhali, Alkidip, Patkushta, Kobadak, Kateshwar, Kalagachia, Burigoalini, Munshiganj, Kadamtala, Chunkuri etc.

Start Date: 01-07-1993

End Date: 30-06-2006

Program Area: Variety and Species

Commodity: Mangrove

Objectives:

1.To know the regeneration status and trend in different salinity

2.To identify various factors affecting the regeneration status and establishment of seedlings.

Methodology:

It were maintained of 27 permanent sample plots (PSPs) by painting the central and boundary trees. The study was under taken from 01-07-1993 to 30-06-2006 for long term study basis with a view to know the yearly appearance and disappearance of seedlings of mangrove species in different salinity zones. To conduct the study the following activities were done.Maintenance of 27 PSPs by painting trees, weeding, fitting-fixing signboards and number plates, collecting regeneration data twice a year (October-November) and (April-May).Collected data were analyzed.

Source of Information: MSD, BFRI, Annual Research progress,2007.

Article Link (Online Journal):

Funding Source:

1. World Bank	Budget: 8,00,000/00
2. Government	Budget: 8,00,000/00

Total Budget (Tk.) : 8,00,000/00

Achievement/Findings:

27 PSPs have been maintained by painting, weeding, fitting-fixing signboards, number plates.
Regeneration data on the seedlings recruitment of mangrove plant species have been collected from 27 Permanent Sample Plots (PSPs) distributed in the Sundarbans (October-November).The regeneration status differ from place to place in different salinity zones of the Sundarbans.
Seedling recruitment was 47,531/ha/yr. The highest recruitment was found in gewa (38%), followed by sundari (35%), kankra (8%), goran (5%) baen (3%) and then passur (2%).

Knowledge Management: Journal