Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks
The Pasur River estuary (PRE), the largest estuary in the Sundarbans mangrove area, provides vital fishery resources and supports millions of livelihoods in the southwestern coastal region of Bangladesh. This study focused on the tidal and run-off effects on the outwelling of nutrients from the Sund...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-12-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844022035587 |
| _version_ | 1797960928216481792 |
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| author | Jahid Hasan Dinesh Chandra Shaha Sampa Rani kundu Minhaz Ahmed Shahroz Mahean Haque Farhana Haque Md. Emranul Ahsan Salman Ahmed Md. Iqbal Hossain Mohammad Abdus Salam |
| author_facet | Jahid Hasan Dinesh Chandra Shaha Sampa Rani kundu Minhaz Ahmed Shahroz Mahean Haque Farhana Haque Md. Emranul Ahsan Salman Ahmed Md. Iqbal Hossain Mohammad Abdus Salam |
| author_sort | Jahid Hasan |
| collection | DOAJ |
| description | The Pasur River estuary (PRE), the largest estuary in the Sundarbans mangrove area, provides vital fishery resources and supports millions of livelihoods in the southwestern coastal region of Bangladesh. This study focused on the tidal and run-off effects on the outwelling of nutrients from the Sundarbans mangrove creeks to the PRE. Spatial and temporal variations of nutrient and chlorophyll-a concentrations were assessed by water sampling at 11 stations in the study area from January to December 2019. Dissolved inorganic nutrients and chlorophyll-a were analyzed by standard methods using a spectrophotometer. In the tidal mangrove creeks, dissolved inorganic nitrogen, phosphate, and silica concentrations were significantly higher (p < 0.05) during the spring tide than those during the neap tide, suggesting that these nutrients were flushed from the mangrove area by the inundation and tidal mixing of the spring tide. In general, chlorophyll-a (mean ± SD) concentrations in the PRE and the tidal mangrove creeks were 5.62 ± 1.30 μg/L and 9.03 ± 0.59 μg/L in the wet season, respectively. During the dry season, the chlorophyll-a decreased to 4.37 μg/L ± 0.68 and 4.94 ± 1.52 μg/L in the PRE and the tidal mangrove creek, respectively. The amount of nutrients outwelled from the mangrove creeks to the estuary was 1.53 ± 0.67 mg/L DIP, 0.001 ± 0.0004 mg/L DIN, and 1.38 ± 0.48 mg/L dissolved silica. DIP, silica, and chlorophyll-a concentrations were significantly higher (p < 0.05) during the spring tide compared to the neap tide, but salinity was not significantly (p > 0.05) different between the two tidal levels. This study showed that the mangrove creeks formed an important link in transporting nutrients from the mangrove forest to the estuary. |
| first_indexed | 2024-04-11T00:51:38Z |
| format | Article |
| id | doaj.art-d850644bb6d642aa8e360fe380382db4 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-11T00:51:38Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-d850644bb6d642aa8e360fe380382db42023-01-05T08:39:41ZengElsevierHeliyon2405-84402022-12-01812e12270Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeksJahid Hasan0Dinesh Chandra Shaha1Sampa Rani kundu2Minhaz Ahmed3Shahroz Mahean Haque4Farhana Haque5Md. Emranul Ahsan6Salman Ahmed7Md. Iqbal Hossain8Mohammad Abdus Salam9Coastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshCoastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh; Corresponding author.National Oceanographic and Maritime Institute, 10/8 Eastern Plaza, Sonargaon Road, Hatirpool, Dhaka 1219, BangladeshDepartment of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshDepartment of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, BangladeshCoastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshCoastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshCoastal and Marine Dynamics Laboratory, Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshDepartment of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshDepartment of Genetics and Fish Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, BangladeshThe Pasur River estuary (PRE), the largest estuary in the Sundarbans mangrove area, provides vital fishery resources and supports millions of livelihoods in the southwestern coastal region of Bangladesh. This study focused on the tidal and run-off effects on the outwelling of nutrients from the Sundarbans mangrove creeks to the PRE. Spatial and temporal variations of nutrient and chlorophyll-a concentrations were assessed by water sampling at 11 stations in the study area from January to December 2019. Dissolved inorganic nutrients and chlorophyll-a were analyzed by standard methods using a spectrophotometer. In the tidal mangrove creeks, dissolved inorganic nitrogen, phosphate, and silica concentrations were significantly higher (p < 0.05) during the spring tide than those during the neap tide, suggesting that these nutrients were flushed from the mangrove area by the inundation and tidal mixing of the spring tide. In general, chlorophyll-a (mean ± SD) concentrations in the PRE and the tidal mangrove creeks were 5.62 ± 1.30 μg/L and 9.03 ± 0.59 μg/L in the wet season, respectively. During the dry season, the chlorophyll-a decreased to 4.37 μg/L ± 0.68 and 4.94 ± 1.52 μg/L in the PRE and the tidal mangrove creek, respectively. The amount of nutrients outwelled from the mangrove creeks to the estuary was 1.53 ± 0.67 mg/L DIP, 0.001 ± 0.0004 mg/L DIN, and 1.38 ± 0.48 mg/L dissolved silica. DIP, silica, and chlorophyll-a concentrations were significantly higher (p < 0.05) during the spring tide compared to the neap tide, but salinity was not significantly (p > 0.05) different between the two tidal levels. This study showed that the mangrove creeks formed an important link in transporting nutrients from the mangrove forest to the estuary.http://www.sciencedirect.com/science/article/pii/S2405844022035587EstuaryCreeksCoastal regionFishery resourcesChlorophyll-a |
| spellingShingle | Jahid Hasan Dinesh Chandra Shaha Sampa Rani kundu Minhaz Ahmed Shahroz Mahean Haque Farhana Haque Md. Emranul Ahsan Salman Ahmed Md. Iqbal Hossain Mohammad Abdus Salam Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks Heliyon Estuary Creeks Coastal region Fishery resources Chlorophyll-a |
| title | Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks |
| title_full | Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks |
| title_fullStr | Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks |
| title_full_unstemmed | Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks |
| title_short | Outwelling of nutrients into the Pasur River estuary from the Sundarbans mangrove creeks |
| title_sort | outwelling of nutrients into the pasur river estuary from the sundarbans mangrove creeks |
| topic | Estuary Creeks Coastal region Fishery resources Chlorophyll-a |
| url | http://www.sciencedirect.com/science/article/pii/S2405844022035587 |
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