Diversity of biological communities along the major Rivers of Sundarbans in Bangladesh

Tumpa Israt Jahan, . and Uddin Md. Nagim, . and Hossain Zakir, . Diversity of biological communities along the major Rivers of Sundarbans in Bangladesh. pp. 127-137. ISSN 0116-6514

Despite recent unexpected and irreversible changes in the environment brought on by global climate change the largest mangrove forest of Sundarbans is still considered a biodiversity hotspot in Bangladesh. This study aimed to assess the abundance diversity indices and richness of plankton and fisheries resources of the four major rivers (Pasur Sela Sibsa and Kapotakkho) in Sundarbans. During the study period (July 2017 to November 2018) the range of pH temperature salinity and dissolved oxygen values were from 7.1 to 8.7 25 C to 32.8 C 1.5 to 23 and 4.3 mg.L- to 7.7 mg.L- respectively. Phytoplankton and zooplankton communities were represented by 29 and 18 species respectively. The number of plankton per litre was highest in the Pasur River during both pre-monsoon and post-monsoon season. A total of 186 species of fish and crustaceans were recorded in the rivers of Sundarbans. The plankton fish and crustacean diversity indices were as follows: Shannon-Wiener diversity (1.22 0.27 to 3.48 0.22) Margalefs richness (1.29 0.33 to 4.56 0.45) and Pielous evenness (0.94 0.04 to 1.02 0.04). The results of the present study underscore new insight on riverine biological communities of the Sundarbans and emphasise the need for long-term monitoring in this ecologically fragile ecosystem.

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Abstract

Despite recent unexpected and irreversible changes in the environment brought on by global climate change the largest mangrove forest of Sundarbans is still considered a biodiversity hotspot in Bangladesh. This study aimed to assess the abundance diversity indices and richness of plankton and fisheries resources of the four major rivers (Pasur Sela Sibsa and Kapotakkho) in Sundarbans. During the study period (July 2017 to November 2018) the range of pH temperature salinity and dissolved oxygen values were from 7.1 to 8.7 25 C to 32.8 C 1.5 to 23 and 4.3 mg.L- to 7.7 mg.L- respectively. Phytoplankton and zooplankton communities were represented by 29 and 18 species respectively. The number of plankton per litre was highest in the Pasur River during both pre-monsoon and post-monsoon season. A total of 186 species of fish and crustaceans were recorded in the rivers of Sundarbans. The plankton fish and crustacean diversity indices were as follows: Shannon-Wiener diversity (1.22 0.27 to 3.48 0.22) Margalefs richness (1.29 0.33 to 4.56 0.45) and Pielous evenness (0.94 0.04 to 1.02 0.04). The results of the present study underscore new insight on riverine biological communities of the Sundarbans and emphasise the need for long-term monitoring in this ecologically fragile ecosystem.

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Item Type:	Article
AGROVOC Term:	Mangrove forests
AGROVOC Term:	Biodiversity
AGROVOC Term:	River fisheries
AGROVOC Term:	Phytoplankton communities
AGROVOC Term:	Zooplankton communities
AGROVOC Term:	Ecosystems
AGROVOC Term:	Sampling
AGROVOC Term:	Water analysis
AGROVOC Term:	Data collection
AGROVOC Term:	Fishery resources
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9891

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