Nutrient regimes and their effect on distribution of phytoplankton in the Bay of Bengal

Paul, Jane T.; Ramaiah, N.; Sardessai, S.

doi:10.1016/j.marenvres.2008.05.007

Cited by 83 publications

(32 citation statements)

References 43 publications

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“…Those studies also showed that cold-core eddies led to the shoaling of a nitracline into the mixed layer and enhanced Chl a and primary production. Paul et al (2008) reported a typical tropical phytoplankton community mostly comprising centric diatoms that prefer high nutrient regimes and have shorter doubling times of the order of hours (sensu Sheldon 1984). Maximum biomass obtained in the western Bay was higher than that reported by Nair et al (1981).…”

Section: Discussionmentioning

confidence: 91%

Mesozooplankton community structure in the upper 1,000 m along the western Bay of Bengal during the 2002 fall intermonsoon

Fernandes

Ramaiah

2013

Zool. Stud.

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Background: Stratification, no upwelling, sediment load, and heavy cloud cover are known to limit primary production in the western Bay of Bengal. Studies on primary consumers in this area are few. Recent studies in the Bay have shown the role of cold-core eddies in enhancing the biological production. This study was carried out to provide a detailed account of variation in mesozooplankton biomass, abundance, and copepod assemblages between cold-core eddy and non-eddy regions in the western Bay. Results: In this study carried out in the western Bay during fall 2002 intermonsoon, we observed a very high zooplankton biovolume of 2.2 ml/m 3 in the mixed layer at station WB3 located within a shallow cold-core eddy. Zooplankton from 29 groups were observed during this study. Calanoid and poecilostomatoid copepods substantially contributed to the total zooplankton abundance and carbon biomass. Below the 200 m depth, there were fewer groups but higher proportion of copepods. Copepodites of calanoids were more abundant between 500 and 1,000 m at the WB3 eddy station. Invertebrate eggs made up a staggering 65% of the total collection in the 200-to 300-m stratum at WB1, a location in the other cold-core eddy. Copepod species diversity (3.39 to 4.77) and richness (2.32 to 4.84) were lower at WB3. Among 147 copepod species in 69 genera found, Oncaea venusta (17% of the total copepod abundance), Paracalanus indicus (5.4%), Lucicutia flavicornis (5.1%), and Pleuromamma indica (4.5%) were the four most dominant ones.

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Section: Discussionmentioning

confidence: 91%

Mesozooplankton community structure in the upper 1,000 m along the western Bay of Bengal during the 2002 fall intermonsoon

Fernandes

Ramaiah

2013

Zool. Stud.

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“…Export of 1.84 ± 46 Tg year ' of DIN from rivers would support -12.2 ± 3.1 Tgyear "^ of new carbon production (11.5 ± 2.9 and 0.66 ± 0.17 TgC year ^ in BOB and AS, respectively). The N/P ratios in the Central and West BOB were lower than 16, indicating nitrate deficiency, whereas N:Si ratio was <1 (Paul et al, 2008).…”

Section: Nitrogen In Coastal/marine Habitats and Food Websmentioning

confidence: 84%

Reactive Nitrogen in Coastal and Marine Waters of India and Its Relationship With Marine Aquaculture

Prema

Singh

Jeyabaskaran

et al. 2017

The Indian Nitrogen Assessment

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“…Stratified water columns, with their characteristic oligotrophic conditions, tend to promote stasis of the resident population, rather than promoting growth or blooms (Smayda 2002). In fact, many studies (McGill 1973;Paul et al 2008) have reported that the surface waters of the BOB are nitrate-deficient. Low surface PO 3− 4 -P values of 0.1 μg-at L −1 have also been recorded in the Bay of Bengal and Andaman Sea (Kabanova 1964;Rozanov 1964).…”

Section: Discussionmentioning

confidence: 99%

Dinoflagellate community structure from the stratified environment of the Bay of Bengal, with special emphasis on harmful algal bloom species

Naik

Hegde

Anil

2011

Environ Monit Assess

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Harmful algal blooms (HABs) have been documented along the coasts of India and the ill effects felt by society at large. Most of these reports are from the Arabian Sea, west coast of India, whereas its counterpart, the Bay of Bengal (BOB), has remained unexplored in this context. The unique characteristic features of the BOB, such as large amount of riverine fresh water discharges, monsoonal clouds, rainfall, and weak surface winds make the area strongly stratified. In this study, 19 potentially harmful species which accounted for approximately 14% of the total identified species (134) of dinoflagellates were encountered in surface waters of the BOB during November 2003 to September 2006. The variations in species abundance could be attributed to the seasonal variations in the stratification observed in the BOB. The presence of frequently occurring HAB species in low abundance (≤ 40 cell L( -1)) in stratified waters of the BOB may not be a growth issue. However, they may play a significant role in the development of pelagic seed banks, which can serve as inocula for blooms if coupled with local physical processes like eddies and cyclones. The predominance of Ceratium furca and Noctiluca scintillans, frequently occurring HAB species during cyclone-prone seasons, point out their candidature for HABs.

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Nutrient regimes and their effect on distribution of phytoplankton in the Bay of Bengal

Cited by 83 publications

References 43 publications

Mesozooplankton community structure in the upper 1,000 m along the western Bay of Bengal during the 2002 fall intermonsoon

Mesozooplankton community structure in the upper 1,000 m along the western Bay of Bengal during the 2002 fall intermonsoon

Reactive Nitrogen in Coastal and Marine Waters of India and Its Relationship With Marine Aquaculture

Dinoflagellate community structure from the stratified environment of the Bay of Bengal, with special emphasis on harmful algal bloom species

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