International Journal of Fisheries and Aquatic Studies
2018, Vol. 6, Issue 3, Part A
Seasonal variation of aquatic weeds at Dekar haor under Sunamganj district, BangladeshAuthor(s):
Abu Saleh Md. Arif, Md. Shahab Uddin, Md. Shahidul Islam, Sadia Nusrat, Poly Rani Das and Mithila BiswasAbstract:
A study was conducted to assess the seasonal variation and present status of aquatic weeds diversity in Dekar haor
under Sunamganj district for the period of nine months from December 2016 to August 2017. The Shannon-Weiner diversity, Margalef richness and Pielou’s evenness index were 1.32±1.19, 3.16±0.94 and 0.42±0.39, respectively. Values of different indices were high in monsoon. Shannon diversity value was the highest (2.95) in August. Species richness value was mostly similar in winter and summer. Margalef species richness was the highest (4.58) in July and the lowest (2.41) was in March. In the species evenness index, a slight variation was observed among the seasons. The highest value (0.96) of species evenness was found in July while the lowest (0.09) was in April. Diversity indices were lower during summer owing to flash flood that occurred in early April. A total of 35 species of aquatic weeds as 13 floating species, 16 emergent and 6 submerged were recorded from the study area. Nymphaeaceae, Araceae and Hydrocharitaceae were the dominant families which contributed 3 species in each. It was observed that emergent weeds were abundant compared to submerged weeds. It was also found that aquatic weeds have both positive and negative aspects. It reveals from the study that aquatic weeds diversity changes from season to season. This study therefore, provides new baseline information on the diversity of aquatic weeds based on seasonal changes. So it is extremely important to conserve these aquatic weeds for human, aquatic organisms, soil health, productivity and friendly environment of the haor.Pages: 01-05 | 738 Views 63 DownloadsDownload Full Article:
How to cite this article:
Abu Saleh Md. Arif, Md. Shahab Uddin, Md. Shahidul Islam, Sadia Nusrat, Poly Rani Das, Mithila Biswas. Seasonal variation of aquatic weeds at Dekar haor under Sunamganj district, Bangladesh. Int J Fish Aquat Stud 2018;6(3):01-05.