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Article

Phytoplankton Community in Relation to Environmental Variables in the Tidal Mangrove Creeks of the Pasur River Estuary, Bangladesh

by
Jahid Hasan
1,
Dinesh Chandra Shaha
1,*,
Sampa Rani Kundu
2,
Fatimah Md Yusoff
3,
Yang-Ki Cho
4,
Farhana Haque
1,
Mohammad Abdus Salam
5,
Salman Ahmed
1,
Md. Abdul Wahab
6,
Minhaz Ahmed
7,
Md. Iqbal Hossain
7 and
Md. Safiul Islam Afrad
8
1
Coastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
2
National Oceanographic and Maritime Institute (NOAMI), Dhaka 1219, Bangladesh
3
International Institute of Aquaculture and Aquatic Sciences, Universiti Putra Malaysia (UPM), Port Dickson 71050, Malaysia
4
School of Earth and Environmental Science/Research Institute of Oceanography, Seoul National University, Seoul 151-742, Korea
5
Department of Genetics and Fish Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
6
WorldFish, Bangladesh and South Asia Office, House 42/A, Road 114, Gulshan 2, Dhaka 1212, Bangladesh
7
Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur 1706, Bangladesh
8
Department of Agricultural Extension and Rural Development, Bangabandhu Sheikh Mujibur Rahman Agricultural University Salna, Gazipur 1706, Bangladesh
*
Author to whom correspondence should be addressed.
Conservation 2022, 2(4), 587-612; https://doi.org/10.3390/conservation2040039
Submission received: 19 August 2022 / Revised: 27 September 2022 / Accepted: 5 October 2022 / Published: 9 October 2022
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Abstract

The Pasur River estuary (PRE) provides vital fishery resources and supports millions of livelihoods in the southwestern coastal region of Bangladesh. Our research focused on phytoplankton community assemblages, alpha diversity indices, and the seasonal succession of major phytoplankton species in relation to physicochemical parameters in the tidal mangrove creeks of the Pasur River estuary. Spatial and temporal variations were assessed by water sampling at 17 stations in the study area from January to December 2019. The mean salinity level in the tidal mangrove creeks of the PRE was significantly (p < 0.05) higher during the dry season than during the wet season. Spatially, no significant variation (p > 0.05) was observed in the dissolved inorganic nitrogen and dissolved inorganic phosphorus between PRE and mangrove creeks, but temporally, the variables varied significantly (p < 0.05). Spatially, no significant variation (p > 0.05) was observed in the alpha diversity of the phytoplankton community but significantly (p < 0.05) varied temporally. Blue-green algae became dominant in the oligohaline conditions during the wet season, while diatoms were dominant during the dry season which severely depleted dissolved silica. In terms of phytoplankton species diversity, our study classifies the study areas as highly diversified zones. Phytoplankton succession from diatoms (dry season) to blue-green algae (wet season) is attributed to the changes in the physicochemical and nutrient parameters depending on seasonal environmental parameter fluctuations. This study illustrated that phytoplankton diversity and density varied with the degrees of habitat and seasonal changes, implying the potential impacts of anthropogenic activities and natural causes on their community structure in tropical estuaries and mangrove creeks.
Keywords: estuary; mangrove creeks; phytoplankton community; seasons; diversity indices estuary; mangrove creeks; phytoplankton community; seasons; diversity indices

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MDPI and ACS Style

Hasan, J.; Shaha, D.C.; Kundu, S.R.; Yusoff, F.M.; Cho, Y.-K.; Haque, F.; Salam, M.A.; Ahmed, S.; Wahab, M.A.; Ahmed, M.; et al. Phytoplankton Community in Relation to Environmental Variables in the Tidal Mangrove Creeks of the Pasur River Estuary, Bangladesh. Conservation 2022, 2, 587-612. https://doi.org/10.3390/conservation2040039

AMA Style

Hasan J, Shaha DC, Kundu SR, Yusoff FM, Cho Y-K, Haque F, Salam MA, Ahmed S, Wahab MA, Ahmed M, et al. Phytoplankton Community in Relation to Environmental Variables in the Tidal Mangrove Creeks of the Pasur River Estuary, Bangladesh. Conservation. 2022; 2(4):587-612. https://doi.org/10.3390/conservation2040039

Chicago/Turabian Style

Hasan, Jahid, Dinesh Chandra Shaha, Sampa Rani Kundu, Fatimah Md Yusoff, Yang-Ki Cho, Farhana Haque, Mohammad Abdus Salam, Salman Ahmed, Md. Abdul Wahab, Minhaz Ahmed, and et al. 2022. "Phytoplankton Community in Relation to Environmental Variables in the Tidal Mangrove Creeks of the Pasur River Estuary, Bangladesh" Conservation 2, no. 4: 587-612. https://doi.org/10.3390/conservation2040039

APA Style

Hasan, J., Shaha, D. C., Kundu, S. R., Yusoff, F. M., Cho, Y.-K., Haque, F., Salam, M. A., Ahmed, S., Wahab, M. A., Ahmed, M., Hossain, M. I., & Afrad, M. S. I. (2022). Phytoplankton Community in Relation to Environmental Variables in the Tidal Mangrove Creeks of the Pasur River Estuary, Bangladesh. Conservation, 2(4), 587-612. https://doi.org/10.3390/conservation2040039

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