Diversity of Biological Communities Along the Major Rivers of Sundarbans in Bangladesh

Q3 Environmental Science

Asian Fisheries Science Pub Date : 2021-06-30 DOI:10.33997/j.afs.2021.34.2.002

Md. Nagim Uddin, Israt Jahan Tumpa, Z. Hossain

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引用次数: 4

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-1 to 7.7 mg.L-1 , 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), Margalef’s richness (1.29 ± 0.33 to 4.56 ± 0.45) and Pielou’s 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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孟加拉国孙德尔本斯主要河流沿岸生物群落的多样性

尽管最近全球气候变化给环境带来了意想不到的、不可逆转的变化，但孙德尔本斯最大的红树林仍然被认为是孟加拉国生物多样性的热点。本研究旨在评估孙德尔本斯4条主要河流(Pasur、Sela、Sibsa和Kapotakkho)的浮游生物丰度、多样性指数和渔业资源丰富度。在研究期间(2017年7月至2018年11月)，pH、温度、盐度和溶解氧值范围为7.1 ~ 8.7,25℃~ 32.8℃，1.5‰~ 23‰，4.3 mg。L-1至7.7毫克。分别是L-1。浮游植物和浮游动物群落分别有29种和18种。在季风前和季风后季节，每升浮游生物的数量在帕苏尔河最高。在孙德尔本斯的河流中共记录了186种鱼类和甲壳类动物。浮游生物、鱼类和甲壳类的多样性指数分别为Shannon-Wiener多样性(1.22±0.27 ~ 3.48±0.22)、Margalef丰富度(1.29±0.33 ~ 4.56±0.45)和Pielou均匀度(0.94±0.04 ~ 1.02±0.04)。本研究的结果强调了对孙德尔本斯河流生物群落的新认识，并强调了对这个生态脆弱的生态系统进行长期监测的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Asian Fisheries Science Agricultural and Biological Sciences-Food Science

CiteScore

2.20

自引率

0.00%

发文量

期刊介绍： The Asian Fisheries Science (AFS) was first published in 1987. It is an open access SCOPUS indexed publication of the Asian Fisheries Society. Four regular issues are published annually in March, June, September and December. In addition, special issues are published on specific topics. Full texts of the articles are available for free download and there is no publication fee. The journal promotes fisheries science which has an international appeal with special focus on Asian interests.