Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India
Seasonal variations in hydrography, trophic status, and plankton community structure were studied along the Tuticorin coastal waters (TCWs) in the Gulf of Mannar (GoM). Samples were collected in 2015 and 2016 to analyze physico-chemical (temperature, pH, salinity, suspended particulate matter (SPM),...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Oceanologia |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0078323422000781 |
| _version_ | 1811180839014236160 |
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| author | Rengasamy Subramaniyan Sathishkumar Arumugam Sundaramanickam Ajit Kumar Mohanty Gouri Sahu Thangavelu Ramesh Kumar Balachandar Ajith Nithin Parthasarathy Surya Krishnan Silambarasan |
| author_facet | Rengasamy Subramaniyan Sathishkumar Arumugam Sundaramanickam Ajit Kumar Mohanty Gouri Sahu Thangavelu Ramesh Kumar Balachandar Ajith Nithin Parthasarathy Surya Krishnan Silambarasan |
| author_sort | Rengasamy Subramaniyan Sathishkumar |
| collection | DOAJ |
| description | Seasonal variations in hydrography, trophic status, and plankton community structure were studied along the Tuticorin coastal waters (TCWs) in the Gulf of Mannar (GoM). Samples were collected in 2015 and 2016 to analyze physico-chemical (temperature, pH, salinity, suspended particulate matter (SPM), dissolved oxygen (DO), nutrients, etc.) and biological parameters (chlorophyll-a, phytoplankton, and zooplankton). The trophic index (TRIX) and eutrophication index (EI) were calculated to describe the eutrophication status of TCWs. Temperature, pH, salinity, DO, and SPM showed seasonality due to the impact of the northeast monsoon. A massive bloom of Trichodesmium erythraeum was observed, with a visible impact on water quality and the plankton community. The cluster and principal component analysis indicated the bloom event as a distinct phenomenon. ANOVA results showed significant seasonal variations rather than spatial variations. According to the trophic indices, the area had a low trophic level in 2015 and a high trophic level in 2016. The Tuticorin inshore waters had the highest TRIX and EI values during the dominance of cyanobacteria bloom in the post-monsoon 2016. The trophic indices had a positive relationship with phytoplankton abundance but showed an inverse relation with zooplankton abundance. The overall range of the TRIX index (3.18–5.96) indicated that the environment was oligotrophic to eutrophic, and EI values (0.72–21.61) indicated that the state of coastal waters was moderate to poor. This study states that periodic monsoonal flow and frequent algal bloom events have a significant impact on the GoM coastal waters. |
| first_indexed | 2024-04-11T09:10:03Z |
| format | Article |
| id | doaj.art-0bb2ffed1dd940248fec543427c4f6ca |
| institution | Directory Open Access Journal |
| issn | 0078-3234 |
| language | English |
| last_indexed | 2024-04-11T09:10:03Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj.art-0bb2ffed1dd940248fec543427c4f6ca2022-12-22T04:32:32ZengElsevierOceanologia0078-32342022-10-01644749768Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, IndiaRengasamy Subramaniyan Sathishkumar0Arumugam Sundaramanickam1Ajit Kumar Mohanty2Gouri Sahu3Thangavelu Ramesh4Kumar Balachandar5Ajith Nithin6Parthasarathy Surya7Krishnan Silambarasan8Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India; Radiological and Environment Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, IndiaCentre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India; Corresponding author at: Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India.Radiological and Environment Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, IndiaRadiological and Environment Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, IndiaCentre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, IndiaFishery Survey of India, Beach Road, Visakhapatnam, Andhra Pradesh, IndiaCentre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, IndiaCentre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, IndiaFishery Survey of India, Beach Road, Visakhapatnam, Andhra Pradesh, IndiaSeasonal variations in hydrography, trophic status, and plankton community structure were studied along the Tuticorin coastal waters (TCWs) in the Gulf of Mannar (GoM). Samples were collected in 2015 and 2016 to analyze physico-chemical (temperature, pH, salinity, suspended particulate matter (SPM), dissolved oxygen (DO), nutrients, etc.) and biological parameters (chlorophyll-a, phytoplankton, and zooplankton). The trophic index (TRIX) and eutrophication index (EI) were calculated to describe the eutrophication status of TCWs. Temperature, pH, salinity, DO, and SPM showed seasonality due to the impact of the northeast monsoon. A massive bloom of Trichodesmium erythraeum was observed, with a visible impact on water quality and the plankton community. The cluster and principal component analysis indicated the bloom event as a distinct phenomenon. ANOVA results showed significant seasonal variations rather than spatial variations. According to the trophic indices, the area had a low trophic level in 2015 and a high trophic level in 2016. The Tuticorin inshore waters had the highest TRIX and EI values during the dominance of cyanobacteria bloom in the post-monsoon 2016. The trophic indices had a positive relationship with phytoplankton abundance but showed an inverse relation with zooplankton abundance. The overall range of the TRIX index (3.18–5.96) indicated that the environment was oligotrophic to eutrophic, and EI values (0.72–21.61) indicated that the state of coastal waters was moderate to poor. This study states that periodic monsoonal flow and frequent algal bloom events have a significant impact on the GoM coastal waters.http://www.sciencedirect.com/science/article/pii/S0078323422000781Algal bloomEutrophicationPlankton diversitySoutheast coast of IndiaTrichodesmiumTRIX |
| spellingShingle | Rengasamy Subramaniyan Sathishkumar Arumugam Sundaramanickam Ajit Kumar Mohanty Gouri Sahu Thangavelu Ramesh Kumar Balachandar Ajith Nithin Parthasarathy Surya Krishnan Silambarasan Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India Oceanologia Algal bloom Eutrophication Plankton diversity Southeast coast of India Trichodesmium TRIX |
| title | Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India |
| title_full | Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India |
| title_fullStr | Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India |
| title_full_unstemmed | Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India |
| title_short | Seasonal assessment of the trophic status in the coastal waters adjoining Tuticorin harbor in relation to water quality and plankton community in the Gulf of Mannar, India |
| title_sort | seasonal assessment of the trophic status in the coastal waters adjoining tuticorin harbor in relation to water quality and plankton community in the gulf of mannar india |
| topic | Algal bloom Eutrophication Plankton diversity Southeast coast of India Trichodesmium TRIX |
| url | http://www.sciencedirect.com/science/article/pii/S0078323422000781 |
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