Role of oceanic fronts in enhancing phytoplankton biomass in the eastern Arabian Sea during an oligotrophic period

Kurian, Siby; Chndrasekhararao, A.V.; Vidya, P.J.; Shenoy, Damodar M.; Gauns, Mangesh; Uskaikar, Hema; Aparna, S G

doi:10.1016/j.marenvres.2020.105023

Cited by 10 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different production and consumption mechanisms led to the spatial distributions of COS, DMS, and CS2 being different. DMS and DMSP concentrations are related to the composition and abundance of phytoplankton (Kurian et al, 2020;Naik et al, 2020;O'Brien et al, 2022). The highest DMS concentrations at station B21 in spring coincided with high Chl a concentrations (Fig.…”

Section: Spatial and Depth Distributions Of Threementioning

confidence: 93%

Spatial and seasonal variability in volatile organic sulfur compounds in seawater and overlying atmosphere of the Bohai and Yellow Seas

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. To better understand the production and loss processes of volatile organic sulfur compounds (VSCs) and their influence factors, VSCs including carbon disulfide (CS2), dimethyl sulfide (DMS), and carbonyl sulfide (COS) were surveyed in the seawater and atmosphere of the Bohai and Yellow Seas during spring and summer of 2018. The concentration ranges of COS, DMS, and CS2 in the surface seawater during spring were 0.14–0.42, 0.41–7.74, and 0.01–0.18 nmol L-1, respectively, and 0.32–0.61, 1.31–18.12, and 0.01–0.65 nmol L-1 during summer. COS and CS2 had high concentrations in coastal waters, which may be due to elevated photochemical production rates. High DMS concentrations occurred near the Yellow River, Laizhou Bay, and Yangtze River Estuary coinciding with high nitrate and Chl a concentrations due to river discharge during summer. The depth distributions of COS, DMS, and CS2 were characterized by high concentrations in the surface seawater that decreased with depth. The mixing ratios of COS, DMS, and CS2 in the atmosphere were 255.9–620.2 pptv, 1.3–191.2 pptv, and 5.2–698.8 pptv during spring, and 394.6–850.1 pptv, 10.3–464.3 pptv, and 15.3–672.7 pptv in summer. The mean oceanic/atmospheric concentrations of COS, DMS, and CS2 were 1.8/1.7-, 3.1/4.7-, and 3.7/1.6-fold higher in summer than spring due to the high Chl a concentrations in summer. The mean sea-to-air fluxes of COS, DMS, and CS2 were 1.3-, 2.1-, and 3.0-fold higher in summer than spring. The sea-to-air fluxes of VSCs indicated that these marginal seas are major sources of VSCs in the atmosphere. The results provide help with a better understanding of the control of VSCs distributions in marginal seas.

show abstract

Section: Spatial and Depth Distributions Of Threementioning

confidence: 93%

Spatial and seasonal variability in volatile organic sulfur compounds in seawater and overlying atmosphere of the Bohai and Yellow Seas

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Mutualistic interactions can be disturbed and even disrupted if the essential benefits can be procured cheaply or freely from other sources. Environmental factors such as external nutrient availability would strongly affect their nutrient cycle–based symbiotic interactions, which is relevant even to open ocean oligotrophic regions, that experience intermittent or irregular nutrient pulses both vertically and horizontally ( 10 , 11 ).…”

Section: Introductionmentioning

confidence: 99%

Inherent tendency of Synechococcus and heterotrophic bacteria for mutualism on long-term coexistence despite environmental interference

Nair

Zhao

et al. 2022

Sci. Adv.

View full text Add to dashboard Cite

Mutualism between Synechococcus and heterotrophic bacteria has been found to support their prolonged survival in nutrient-depleted conditions. However, environmental interference on the fate of their mutualism is not understood. Here, we show that exogenous nutrients disrupt their established mutualism. Once the exogenous nutrients were exhausted, Synechococcus and heterotrophic bacteria gradually reestablished their metabolic mutualism during 450 days of culture, which revived unhealthy Synechococcus cells. Using metagenomics, metatranscriptomics, and the 15 N tracer method, we reveal that the associated bacterial nitrogen fixation triggered the reestablishment of the mutualism and revival of Synechococcus health. During this process, bacterial community structure and functions underwent tremendous adjustments to achieve the driving effect, and a cogeneration of nitrogen, phosphorus, iron, and vitamin by the heterotrophic bacteria sustained Synechococcus ’s prolonged healthy growth. Our findings suggest that Synechococcus and heterotrophic bacteria may have an inherent tendency toward mutualism despite environmental interference. This may exhibit their coevolutionary adaptations in nutrient-deficient environments.

show abstract

Variability in phytoplankton shape dominance in marine pelagic systems: prevalence of different adaptive strategies in the eastern Arabian Sea during the winter monsoon

Paul

Patil

Anil

2023

Environ Monit Assess

View full text Add to dashboard Cite

Role of oceanic fronts in enhancing phytoplankton biomass in the eastern Arabian Sea during an oligotrophic period

Cited by 10 publications

References 51 publications

Spatial and seasonal variability in volatile organic sulfur compounds in seawater and overlying atmosphere of the Bohai and Yellow Seas

Spatial and seasonal variability in volatile organic sulfur compounds in seawater and overlying atmosphere of the Bohai and Yellow Seas

Inherent tendency of Synechococcus and heterotrophic bacteria for mutualism on long-term coexistence despite environmental interference

Variability in phytoplankton shape dominance in marine pelagic systems: prevalence of different adaptive strategies in the eastern Arabian Sea during the winter monsoon

Contact Info

Product

Resources

About