Marsh foraminiferal assemblages in relation to vegetation in Sunderban, India

Ghosh, Ankush; Biswas, Sanjib; Barman, Prasenjit

doi:10.1007/s12594-014-0176-1

Cited by 12 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar observation is also recorded through PCA and correlation matrix analysis which shows that their association is more influenced by silty clay and clayey silt sediments rather than salinity. Second assemblage (Group B) is mainly dominating in the shallow water regime which mostly comprises of the fine sand and robust benthic foraminifers test (Figure 3), indicating relatively high energy and turbulent environment (Murray, 1991, Ghosh et al, 2014. Therefore, the presence of Asterorotalia with two to three spines in this group supports above energy condition (Ghosh, 1966).…”

Section: Discussionmentioning

confidence: 91%

“…As like, other estuary along the east coast of India, Sundarban delta receives inadequate attention even after having larger scope of benthic foraminiferal variation particularly off Bakkhali. Previous studies were mainly focused on the marsh, mud flat and tidal channels in the inner part of the delta (Sabyasachi et al, 1996;Gautam, 2010;Ghosh et al, 2014;Tripathi et al, 2017a;2017b;Tripathi et al, 2018). However, no such study is undertaken in the open sea especially in the submarine channels off Bakkhali.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Channel Controlled Foraminiferal Distribution off Bakkhali, West Bengal, India

Tripathi

Baraik

et al. 2018

BoMG

View full text Add to dashboard Cite

Study area is situated 8 km south of the Bakkhali Island, West Bengal of India and its subaqueous environment influenced by the fluvial processes such as Hooghly River in west and its distributary like Muri Ganga in the centre and Saptamukhi River in the east. To understand the submarine behavior of these channels and associated meiobenthos, total of 28 sediment samples have been studied in detail. The study reveal that a total of fifteen species of recent benthic foraminifera belonging to 13 genera under 11 families were present and their distribution mainly controlled by channel morphology and sediment character. Based on the distribution of these benthic foraminiferal species, two assemblages have been identified. First assemblage, observed within the Hooghly and Muri Ganga channel, where salinity is comparatively low and sediment is mainly dominated by silt and clay. The most dominating benthic foraminifers of this assemblage are Ammobaculites agglutinans, Cribrostomoides jeffreysii and Asterorotalia trispinosa. Whereas, second assemblage mainly comprise of A. trispinosa, Ammonia beccarii, Asterorotalia spp., Elphidium excavatum, Elphidium crispum and Ammonia tepida noticed over the sand bars and adjoining shallow area. Keywords: channel morphology, Muri Ganga, Hooghly, sand bar

show abstract

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Channel Controlled Foraminiferal Distribution off Bakkhali, West Bengal, India

Tripathi

Baraik

et al. 2018

BoMG

View full text Add to dashboard Cite

show abstract

“…Haplophragmoides canariensis is dominant in high marsh zone (Gupta 1999, Murray 1999b, Ghosh 2014. So, Kochikhali and Dimer char are demarcated as low to high marsh zone of depositional environments.…”

Section: Discussionmentioning

confidence: 99%

“…Competition, space and food supply are also included in the biotic factors of this ecosystem. In time and space, such macro-level environmental factors of mangroves changes (Ghosh et al 2014). These changes are well reflected in the distribution of foraminifera.…”

Section: Introductionmentioning

confidence: 99%

Systematics of Modern Benthic Foraminiferal Assemblages From the Deltaic Mangrove Ecosystem of Sundarbans

Saha

2021

J. Asiat. Soc. Bangladesh, Sci.

View full text Add to dashboard Cite

The contemporary intertidal foraminifera and estuarine environment information were collected from the four sites adjoining the deltaic mangrove environment in the Sundarbans. The marsh zones of the south-western coastal region of Bangladesh were examined for modern benthic foraminifera and to expound on the relationship of the foraminiferal assemblages with the environment. Due to high inaccessibility and remoteness, the taxonomic study of foraminifera and its depositional environment remains largely overlooked in the Sundarbans of Bangladesh. This study includes a detailed survey of depositional environment of these fluvio-deltaic to shallow marine sediments. The seventeen species belonging to fourteen genera representing nine families were recorded from surficial sediment of supratidal, intertidal, and dune environment of Kotka, Jamtala, Kochikhali, and Dimer char area. In the present study, these foraminiferal assemblages are characterized calcareous and agglutinated foraminifera. The Kotka beach is recognized as Nonionina assemblage zone, Jamtala beach designated as Ammonia assemblage zone, Kochikhali as Nonionina assemblage zone and Dimer char as Rosalina-Nonionina-Nonionella assemblage zone. The deposition of foraminifera is restricted to Sundarbans’ low to high marsh zone. J. Asiat. Soc. Bangladesh, Sci. 47(2): 121-136, December 2021

show abstract

“…They show large and systematic variations in their seawater chemistry due to their involvement in biological cycling; [2] 'physical' proxies such as Mg, Sr, F and B isotopes, which dominantly reflect physical parameters such as temperature and pressure. The ratio of conservative elements to Ca is nearly fixed in seawater, and among the three groups, conservative elements have the longest oceanic residence times; [3] 'chemical' proxies such as Li, U, V, Sr, and Nd isotopes, which provide diverse information on the history of ocean chemistry; and [4][5][6] 'diagenetic' proxies such as Mn, which reflect secondary post-depositional processes. Particle reactive elements are rapidly cycled and have typically short oceanic residence times.…”

mentioning

confidence: 99%

The Marine Protist Foraminifera

Ishita¹

2020

IJPBP

View full text Add to dashboard Cite

Marsh foraminiferal assemblages in relation to vegetation in Sunderban, India

Cited by 12 publications

References 18 publications

Channel Controlled Foraminiferal Distribution off Bakkhali, West Bengal, India

Channel Controlled Foraminiferal Distribution off Bakkhali, West Bengal, India

Systematics of Modern Benthic Foraminiferal Assemblages From the Deltaic Mangrove Ecosystem of Sundarbans

The Marine Protist Foraminifera

Contact Info

Product

Resources

About