Strong variability in bacterioplankton abundance and production in central and western Bay of Bengal

Fernandes, Veronica; Ramaiah, N.; Paul, Jane T.; Sardessai, S.; Babu, R. Jyoti; Gauns, Mangesh

doi:10.1007/s00227-007-0873-z

Cited by 34 publications

(9 citation statements)

References 35 publications

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“…The close association between DOC stocks and picoplankton abundance and activity observed in this study is similar to those gradients found in estuarine and coastal aquatic systems (e.g. Wetzel, 1992;Fernandes et al, 2008), but is rare for marine systems (e.g., Carlson and Ducklow, 1995;Kaartokallio et al, 2007;H. Ducklow, pers.…”

Section: Water Mass Characteristics and Distributions Of Bulk Chemicasupporting

confidence: 86%

Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea

Meador

Gogou

Spyres

et al. 2010

Deep Sea Research Part II: Topical Studies in Oceanography

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We targeted the warm, subsurface waters of the Eastern Mediterranean Sea (EMS) to investigate processes that are linked to the chemical composition and cycling of dissolved organic carbon (DOC) in seawater. The apparent respiration of semi-labile DOC accounted for 27 ± 18% of oxygen consumption in EMS mesopelagic and bathypelagic waters; this value is higher than Taken together, this study elucidates key relationships between the chemical composition of DOM and heterotrophic metabolism.

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Section: Water Mass Characteristics and Distributions Of Bulk Chemicasupporting

confidence: 86%

Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea

Meador

Gogou

Spyres

et al. 2010

Deep Sea Research Part II: Topical Studies in Oceanography

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“…The production of TPURA by micro-organisms is influenced by many factors, especially nutrients and the composition of microorganisms (Decho 1990;Hung et al 2003). Both these factors showed spatial and seasonal variation and thus may have influenced the abundance of TPURA in the Bay Sardessai et al 2007;Fernandes et al 2008).…”

Section: Tpuramentioning

confidence: 99%

“…According to Gauns et al (2005) Chl a, primary production, phytoplankton and zooplankton abundance are several fold lower in the Bay as compared to the Arabian Sea. Many factors including cloud cover, large sediment load, narrow shelf, stratification, etc., are considered to be responsible for the low production in the Bay (Madhupratap et al 2003;Paul et al 2007;Fernandes et al 2008).…”

Section: Description Of the Study Areamentioning

confidence: 99%

“…There are many studies describing the physical, chemical and biological characteristics of the Bay of Bengal (Madhupratap et al 2003;Prasanna Kumar et al 2004Sardessai et al 2007;Paul et al 2007Paul et al , 2008Fernandes et al 2008). However, there is only one study that deals with the seasonal variation in the characterization of suspended particulate organic matter of the Bay of Bengal (Khodse et al 2007).…”

Section: Introductionmentioning

confidence: 95%

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Distribution of particulate carbohydrate species in the Bay of Bengal

2009

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Suspended particulate matter (SPM) of surface seawaters was collected during December 2003 to October 2004 at 10 stations in the Bay of Bengal, and analyzed for particulate organic carbon (POC), total particulate nitrogen (TPN), total particulate carbohydrate (TPCHO) and total particulate uronic acids (TPURA). The concentrations of POC, TPCHO and TPURA varied from 4.80 to 29.12, 0.85 to 4.24, 0.09 to 0.91 µM C, respectively. The TPCHO-C and TPURA-C accounted for 6.6-32.5% and 0.87-3.65% of POC. The trends observed for the distribution of these compounds were generally similar to those recorded for the distribution of chlorophyll a (Chl a). The C/N ratios varied from 3.2 to 22.3 with most of the values being < 10. This suggests that the organic matter was mostly derived from phytoplankton and bacteria. Relatively low C/N ratios and high TPCHO yield imply that freshly derived organic matter was present during SWM and FIM. Our data suggest that the quality and quantity of organic matter varied spatially and seasonally.

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“…The freshwater discharge and physical processes influence the seasonality of bacterioplankton regime of the BOB [6]. During the summer monsoon, the biological productivity is influenced by mesoscale and basin scale physical processes [7][8].…”

mentioning

confidence: 99%

Numerical Analysis of the Biogeochemical Parameters in the Bay of Bengal

Deb¹,

Chakraborty²

2016

JSOE

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Oceanic nutrient cycling plays a key role in understanding how oceanic biogeochemical parameters respond in varying physical and anthropogenically controlled processes. OA (Objective Analysis) of monthly climatology of WOA13 (World Ocean Atlas 13) nutrient data of 5 km resolution called Nutrient-Climo has been done in this paper for analyzing the nutrient-rich region in the BOB (Bay of Bengal) and the mechanisms of physical forces were examined using six years (2002)(2003)(2004)(2005)(2006)(2007) global ocean monthly analysis datasets based on the SODA v2.0.4 (Simple Ocean Data Assimilation package). The upwelled zones established from the circulation pattern were well synchronized with the nitrate rich zones. The POC (particulate organic carbon) of 5 km resolution has been analyzed from MODIS (Moderate-resolution Imaging Spectroradiometer) data and Chl a (Chlorophyll a) concentration SeaWiFS (Sea-viewing Wide Field-of-view Sensor) data of 9 km resolution are used to predict the productive zones in the BOB. In this paper, we examined that Chl a concentration (above 0.5 mg/m 3 ) is found during the post-monsoon followed by winter in the north-western, north-eastern coast and head BOB as the source of nutrients is also supplementary due to high input of litter and sediment associated nutrients that are released during estuarine transport.

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Strong variability in bacterioplankton abundance and production in central and western Bay of Bengal

Cited by 34 publications

References 35 publications

Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea

Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea

Distribution of particulate carbohydrate species in the Bay of Bengal

Numerical Analysis of the Biogeochemical Parameters in the Bay of Bengal

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