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Mohanty TR, Das BK, Tiwari NK, Kumari S, Mondal K, Kundu S, Das Gupta S, Roy S, Baitha R, Ramteke MH, Swain HS, Upadhyay A. Diel variation of plankton in the highly impacted freshwater zone of Hooghly estuary in relation to ecological alteration. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:154. [PMID: 38225421 DOI: 10.1007/s10661-023-12274-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
Plankton are promising ecological monitoring tool that responds quickly to any sort of aquatic ecological alteration, of which many of them are much susceptible to ecological variations. Therefore, monitoring shifts in plankton composition can indicate changes in water quality and aid to identify potential pollution sources. In the present study, the variation in plankton dynamics in relation to ecological variables were monitored in the freshwater zone of the Hooghly estuary from May 2020 to April 2021. The study was conducted in the interval of every six hours. i.e., at 6 A.M., 12 P.M., 6 P.M., and 12 A.M. The present finding revealed the occurrence of 54 phytoplankton and 20 zooplankton taxa/species. Diel variation revealed that among different time intervals, the highest abundance of phytoplankton was recorded 28,307 cells l-1 at 12 P.M, while the lowest was recorded 10,632 cells l-1 at 6 A.M. However, the highest zooplankton abundance was observed 804 ind l-1 at 6 A.M., and the lowest was recorded 156 ind l-1 at 6 P.M. The ANOVA (p < 0.05) analysis indicated significant diel variation for many planktonic genera. The CCA exhibited that most of the phytoplankton were influenced by multiple water quality variables such as temperature, turbidity, calcium, pH, salinity, DO, and nutrients. However, the majority of the zooplankton were affected by turbidity, total phosphorus, sulphate, calcium and available nitrogen. Significant seasonal variation in plankton composition has also been observed. The present study will help to determine the varying diel pattern of planktons in retort to alterations in the water quality parameters and varying ecological niches.
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Affiliation(s)
- Trupti Rani Mohanty
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Basanta Kumar Das
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120.
| | - Nitish Kumar Tiwari
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Suman Kumari
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Kausik Mondal
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Sourav Kundu
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Subhadeep Das Gupta
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Shreya Roy
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Raju Baitha
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Mitesh Hiradas Ramteke
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Himanshu Shekhar Swain
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India, 751002
| | - Aurobinda Upadhyay
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
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