Influence of eddies on phytoplankton composition in the Bay of Bengal

Sarma, V. V. S. S.; Rajula, G.R.; Durgadevi, D.S.L.; Kumar, G. Sampath; Jagadeesan, L.

doi:10.1016/j.csr.2020.104241

Cited by 15 publications

(7 citation statements)

References 51 publications

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“…The static oligotrophic environment reasonably supports the growth of picoplankton (Agawin et al 2000) Sarma et al (2020a) observed high abundance of picoplankton at ACE, while the low microplankton abundance at ACE was due to the unavailability of DIN and DIP during June 2019 in the Bay. In the present study, picoplankton constituted up to 29% of the POC pool.…”

Section: Impact Of Eddies On Elemental Proportionsmentioning

confidence: 70%

“…Recently Sarma et al (2020a) have reported that the picoplankton contributed up to 80% and the micro and nanoplankton contributed between 10 to 30% to the total phytoplankton biomass in the Bay during June 2019. The total phytoplankton biomass reportedly constitutes up to 27% of the total POC pool in the Bay (Baer et al 2019).…”

Section: Impact Of Eddies On Elemental Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Phytoplankton community composition is different in the different type of eddies, e.g., microplankton flourish in nutrient rich cyclonic eddies while picoplankton dominate in the nutrient depleted ACEs (Sarma et al 2020a). Apparently, 50-60% of phytoplankton abundance in the Bay is of the picoplankton alone, while nanoplankton are the second most abundant species (Sarma et al 2020a). At ACE regions, picoplankton constitute a major fraction of phytoplankton owing to their hypothesized potential to consume dissolved organic nutrients in depleted inorganic nutrient regimes (Sarma et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

“…Apparently, 50-60% of phytoplankton abundance in the Bay is of the picoplankton alone, while nanoplankton are the second most abundant species (Sarma et al 2020a). At ACE regions, picoplankton constitute a major fraction of phytoplankton owing to their hypothesized potential to consume dissolved organic nutrients in depleted inorganic nutrient regimes (Sarma et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

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Role of eddies and N2 fixation in regulating C:N:P proportions in the Bay of Bengal

et al. 2021

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Recent observations and numerical simulations have profoundly established that the C:N:P ratios in the ocean deviate from the canonical Redfield Ratio (106:16:1). Physical and biogeochemical processes have been hypothesized to be responsible for this deviation. However, a paucity of concurrent observations on biogeochemical and physical parameters have barred us to understand their exact role on the C:N:P ratios. For this purpose, we have sampled the Bay of Bengal for its C, N, and P contents in the organic and inorganic pools from 5 to 2000 m depth at eight stations (five coastal and three open ocean) during boreal spring 2019. Mesoscale anticyclonic eddies were identified at two of the sampling stations, where nutrient concentrations were lower in the top layer (5 m to the depth of chlorophyll maximum) compared to those at the non-eddy stations. Mean (NO 3 -?NO 2 -):PO 4 3ratio was lower at the anticyclonic eddy stations compared to that at the non-eddy stations in the top layer. Yet C:N:P ratios in the particulate and dissolved organic matter in the top layer were the same at anticyclonic eddy and non-eddy stations. Overall the mean C:N:P ratios were 249:39:1 in particulate organic matter and 2338:146:1 in dissolved organic matter in the top layer. Biological N 2 fixation was not a driver in controlling the N:P ratio of the export flux and the subsurface water nutrient ratios during spring. Although the Bay of Bengal receives large riverine influx, its influence in changing the C:N:P ratios was small during this study.

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Section: Impact Of Eddies On Elemental Proportionsmentioning

confidence: 70%

Section: Impact Of Eddies On Elemental Proportionsmentioning

confidence: 99%