Microplankton size structure induced by a warm-core eddy in the western Bay of Bengal: Role of Trichodesmium abundance

Chinnadurai, Karnan; Jyothibabu, R.; Nagarathinam, Arunpandi; Subramanian, Pandiyarajan Rethinam; SINGARAM, P; Shoba, Santhikrishnan

doi:10.1016/j.oceano.2021.02.003

Cited by 9 publications

(2 citation statements)

References 59 publications

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“…High abundances of Pro and Trichodesmium spp. were detected at stations influenced by the anticyclonic eddy (Figures 4E, F), in agreement with previous reports in anticyclonic eddies (Hernańdez et al, 2020;Karnan et al, 2021).…”

Section: Hydrodynamics Shapes Phytoplankton Community Carbon Content ...supporting

confidence: 93%

Hydrodynamics drives shifts in phytoplankton community composition and carbon-to-chlorophyll a ratio in the northern South China Sea

Chen,

Shi,

et al. 2023

Front. Mar. Sci.

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Phytoplankton play significant roles in the carbon cycle in oceans. Phytoplankton biomass and community composition are often mediated by ocean hydrodynamics. It is vital to quantify the phytoplankton carbon content and carbon:Chlorophyll a (C:Chl a) ratio and to better understand the link between hydrodynamics and phytoplankton communities in marine environments, which are important parameters in marine biogeochemical models. Environmental variables, phytoplankton community composition, abundance, particulate organic carbon, and Chl a were determined in summer in the northern South China Sea (SCS), which was influenced by the Pearl River discharge, upwelling, and anticyclonic eddy, to examine the links between hydrodynamics, phytoplankton community, and C:Chl a ratio. Our results showed that the spatial variabilities in phytoplankton community composition, and carbon content, and C:Chl a ratio were driven by hydrodynamics. Nutrient enrichment favored the growth of diatoms, especially small chain-forming diatoms at the Pearl River Estuary stations. From inshore to offshore, the dominant phytoplankton shifted from small-chain diatoms to large diatoms and dinoflagellates, increasing phytoplankton biodiversity from inshore to offshore. Weak upwelling caused an increase in Synechococcus abundance, while an anticyclonic eddy resulted in a high abundance of Prochlorococcus and Trichodesmium spp. in the present study. We found that the relationship between phytoplankton carbon content and the logarithm of Chl a concentration fit an exponential curve. The C:Chl a ratio increased from 72.7 g g−1 at Pearl River Estuary stations, to 101 g g−1 at Pearl River discharge dilution stations and to 131 g g−1 at SCS surface stations due to shifts in phytoplankton community composition. The low C:Chl a ratio was attributed to the high abundance of diatoms in the Pearl River plume-impacted area, whereas a high C:Chl a ratio was related to the dominance of cyanobacteria at SCS surface stations. Our findings provide insights into quantifying phytoplankton carbon content and understanding the links between hydrodynamics, phytoplankton community composition, carbon content, and C:Chl a ratio in oceans.

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Section: Hydrodynamics Shapes Phytoplankton Community Carbon Content ...supporting

confidence: 93%

Hydrodynamics drives shifts in phytoplankton community composition and carbon-to-chlorophyll a ratio in the northern South China Sea

Chen,

Shi,

et al. 2023

Front. Mar. Sci.

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“…The spatial and temporal variation in the community structure of phytoplankton is influenced by the alterations in the physical and Hydrobiological variables in the marine environment [1][2][3]. Research in the recent past from the present study domain shows the strong biophysical coupling between hydrographical parameters and the kind of plankton existing in diverse environments [4][5][6]. The major features of phytoplankton are its shape and size which controls biochemical Functions such as plankton growth and nutrient intake.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal Distribution and Biochemical Composition of Phytoplankton along the Coastal Waters of Dakshin Kannada District, Karnataka, India

Daggula

Naik

2023

IJECC

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The phytoplankton distribution and biochemical composition concerning water quality parameters were studied in the coastal waters off Mangalore, Monthly sampling was carried out from October 2020 to May 2022 at selected stations of Netravathi-Gurupura estuary, latitude 12°50'38.56" N, longitude 74°50'0.23° to coastal waters off Padubidri latitude 13° 8'0. 57" N longitude 74°42'9.47° with an average depth of 8 meters. Spatiotemporally the phytoplankton, chlorophyll-a and phytoplankton biochemical composition showed a significant difference for the entire duration. During the present investigation, 35 different phytoplankton genera belonging to 3 groups were observed with complete domination from diatoms with 27 genera followed by Dinoflagellates 7 and blue-green algae. distribution and abundance of the phytoplankton were mainly Chaetoceros sp., Ceratium sp., Thallasiocera sp., Biddulphia sp., Coscinodiscus sp., Rhizosolenia sp., Ditylum sp., Triceratium sp., Nitzschia sp. and blue-green algae under Chrysophyta, Bryophyta, Chlorophyta, Cyanophyta were observed, while in biochemical composition of phytoplankton, the carbon contributed to the highest percentage and hydrogen constitute to the lowest percentage. Crude protein and Lipid contents are maximum during post-monsoon and carbohydrates showed their highest content during pre-monsoon for phytoplankton. There is a direct relationship between the biochemical composition and the physiochemical and environmental conditions including nutrients, especially nitrates and phosphates.

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Copepod carcasses in the western Bay of Bengal and associated ecology

Arunpandi

Jyothibabu

Jagadeesan

et al. 2022

Environ Monit Assess

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Microplankton size structure induced by a warm-core eddy in the western Bay of Bengal: Role of Trichodesmium abundance

Cited by 9 publications

References 59 publications

Hydrodynamics drives shifts in phytoplankton community composition and carbon-to-chlorophyll a ratio in the northern South China Sea

Hydrodynamics drives shifts in phytoplankton community composition and carbon-to-chlorophyll a ratio in the northern South China Sea

Spatio-temporal Distribution and Biochemical Composition of Phytoplankton along the Coastal Waters of Dakshin Kannada District, Karnataka, India

Copepod carcasses in the western Bay of Bengal and associated ecology

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