Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India
Hooghly River, a ~460 km long distributary of the Ganga River, passes through a highly industrialized Metropolis-Kolkata in West Bengal, India, and eventually empties into the Bay of Bengal at Gangasagar. To determine the patterns and drivers of planktonic community, spatiotemporal variations in wat...
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ftdoajarticles:oai:doaj.org/article:7e54ae3adf8545ee86eb52e2950ddf2b 2023-05-15T18:49:45+02:00 Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India Diwakar Prakash Chandra Bhushan Tiwary Ram Kumar 2023-01-01T00:00:00Z https://doi.org/10.3390/jmse11010088 https://doaj.org/article/7e54ae3adf8545ee86eb52e2950ddf2b EN eng MDPI AG https://www.mdpi.com/2077-1312/11/1/88 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11010088 2077-1312 https://doaj.org/article/7e54ae3adf8545ee86eb52e2950ddf2b Journal of Marine Science and Engineering, Vol 11, Iss 88, p 88 (2023) bacteria estuary river plankton trophic structure Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2023 ftdoajarticles https://doi.org/10.3390/jmse11010088 2023-01-22T01:27:20Z Hooghly River, a ~460 km long distributary of the Ganga River, passes through a highly industrialized Metropolis-Kolkata in West Bengal, India, and eventually empties into the Bay of Bengal at Gangasagar. To determine the patterns and drivers of planktonic community, spatiotemporal variations in water quality and micronutrient content and planktic prokaryotic and microeukaryotic abundance and diversity across the salinity gradient (0.1 to 24.6 PSU) in the Hooghly River estuary (HRE) were studied. Plankton and water samples were collected at six sites during October 2017, February 2018, and June 2018. The biotic parameters—phytoplankton (Chlorophyll a ), total bacterial abundance (cfu), and copepods—were significantly higher in the downstream estuarine sites than in the upstream riparian sites; conversely, rotifer and cladoceran abundances were significantly higher at upstream stations. The most culturable bacterial strains were isolated from the two freshwater sites and one at the confluence (estuarine) and are characterized as Bacillus subtilis , Pseudomonas songnenesis , and Exiguobacterium aurantiacum . Among zooplankton, rotifers (0.09 ± 0.14 ind L −1 ) and cladocerans (5.4 ± 8.87 ind L −1 ) were recorded in higher abundance and negatively correlated with bacterial concentrations at upstream stations. On the temporal scale, February samples recorded lower proportions of bacterivorous zooplankton at the three upstream stations. Cluster analysis separated samples on the basis of seasons and water mass movement. The February samples showed distinct spatial characteristics, as three freshwater (FW) stations grouped together and segregated at second 2nd hierarchical level, whereas the three estuarine stations formed a separate cluster at the 50% similarity level. Samples collected in October 2017 and June 2018 exhibited mixed attributes. June samples recorded higher influence of freshwater discharge. The zooplankton abundance showed significant negative correlation with Chl a . Our results demonstrate the ... Article in Journal/Newspaper Copepods Rotifer Directory of Open Access Journals: DOAJ Articles Journal of Marine Science and Engineering 11 1 88 |
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English |
topic |
bacteria estuary river plankton trophic structure Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
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bacteria estuary river plankton trophic structure Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Diwakar Prakash Chandra Bhushan Tiwary Ram Kumar Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
topic_facet |
bacteria estuary river plankton trophic structure Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
Hooghly River, a ~460 km long distributary of the Ganga River, passes through a highly industrialized Metropolis-Kolkata in West Bengal, India, and eventually empties into the Bay of Bengal at Gangasagar. To determine the patterns and drivers of planktonic community, spatiotemporal variations in water quality and micronutrient content and planktic prokaryotic and microeukaryotic abundance and diversity across the salinity gradient (0.1 to 24.6 PSU) in the Hooghly River estuary (HRE) were studied. Plankton and water samples were collected at six sites during October 2017, February 2018, and June 2018. The biotic parameters—phytoplankton (Chlorophyll a ), total bacterial abundance (cfu), and copepods—were significantly higher in the downstream estuarine sites than in the upstream riparian sites; conversely, rotifer and cladoceran abundances were significantly higher at upstream stations. The most culturable bacterial strains were isolated from the two freshwater sites and one at the confluence (estuarine) and are characterized as Bacillus subtilis , Pseudomonas songnenesis , and Exiguobacterium aurantiacum . Among zooplankton, rotifers (0.09 ± 0.14 ind L −1 ) and cladocerans (5.4 ± 8.87 ind L −1 ) were recorded in higher abundance and negatively correlated with bacterial concentrations at upstream stations. On the temporal scale, February samples recorded lower proportions of bacterivorous zooplankton at the three upstream stations. Cluster analysis separated samples on the basis of seasons and water mass movement. The February samples showed distinct spatial characteristics, as three freshwater (FW) stations grouped together and segregated at second 2nd hierarchical level, whereas the three estuarine stations formed a separate cluster at the 50% similarity level. Samples collected in October 2017 and June 2018 exhibited mixed attributes. June samples recorded higher influence of freshwater discharge. The zooplankton abundance showed significant negative correlation with Chl a . Our results demonstrate the ... |
format |
Article in Journal/Newspaper |
author |
Diwakar Prakash Chandra Bhushan Tiwary Ram Kumar |
author_facet |
Diwakar Prakash Chandra Bhushan Tiwary Ram Kumar |
author_sort |
Diwakar Prakash |
title |
Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
title_short |
Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
title_full |
Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
title_fullStr |
Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
title_full_unstemmed |
Ecosystem Variability along the Estuarine Salinity Gradient: A Case Study of Hooghly River Estuary, West Bengal, India |
title_sort |
ecosystem variability along the estuarine salinity gradient: a case study of hooghly river estuary, west bengal, india |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11010088 https://doaj.org/article/7e54ae3adf8545ee86eb52e2950ddf2b |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Journal of Marine Science and Engineering, Vol 11, Iss 88, p 88 (2023) |
op_relation |
https://www.mdpi.com/2077-1312/11/1/88 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11010088 2077-1312 https://doaj.org/article/7e54ae3adf8545ee86eb52e2950ddf2b |
op_doi |
https://doi.org/10.3390/jmse11010088 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
1 |
container_start_page |
88 |
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1766243353051004928 |