Nutrient dynamics and seasonal variation of phytoplankton assemblages in the coastal waters of southwest Bay of Bengal

Achary, M. Smita; Panigrahi, Satyanarayan; Satpathy, K.K.; Sahu, Gouri; Mohanty, A. K.; Selvanayagam, M.; Panigrahy, R. C.

doi:10.1007/s10661-014-3812-8

Cited by 38 publications

(17 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar type of upsurge in relative dominance of diatom followed by dinoflagellates has been observed in coastal waters of south- western BoB associated with lower saline conditions (Rajasekar et al 2010). In agreement to the present observation, recent study at south-west coastal waters of BoB has resulted with similar species richness of 219 taxa predominated by diatoms followed by dinoflagllates (Achary et al 2014). The high species richness and ubiquity of diatoms indicated a healthy ecosystem in coastal waters of north-western BoB (Armbrust 2009).…”

Section: Spatial and Seasonal Distribution Of Zooplanktonsupporting

confidence: 91%

Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal

Baliarsingh

Srichandan

Lotliker

et al. 2016

Environ Monit Assess

View full text Add to dashboard Cite

A comprehensive analysis on seasonal distribution of phytoplankton community structure and their interaction with environmental variables was carried out in two local water types (type 1 < 30 m isobath and Type 2 > 30 m isobath) at a coastal site in north-western Bay of Bengal. Phytoplankton community was represented by 211 taxa (146 marine, 37 fresh, 2 brackish, 20 marine-fresh, and 6 marine-brackish-fresh) belonging to seven major groups including 45 potential bloom forming and 22 potential toxin producing species. The seasonal variability depicted enrichment of phytoplankton during pre-monsoon in both water types. Total phytoplankton abundance pattern observed with inter-annual shift during monsoon and post-monsoon period at both water types. In both water types, diatom predominance was observed in terms of species richness and abundance comprising of centric (82 sp.) and pennate (58 sp.) forms. Pennate diatoms, Thalassiothrix longissima and Skeletonema costatum preponderated in both the water types. The diatom abundance was higher in type 1 in comparison to type 2. In general, SiO4 found to fuel growth of the dominant phytoplankton group, diatom in both the water types despite comparative lower concentration of other macronutrients in type 2.

show abstract

Section: Spatial and Seasonal Distribution Of Zooplanktonsupporting

confidence: 91%

Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal

Baliarsingh

Srichandan

Lotliker

et al. 2016

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Islam and Aziz (1975) and Aziz and Islam (1979) reported 64 marine phytoplankton species and 22 marine dinoflagellates species from the north-eastern Bay of Bengal, respectively that was nearly similar with the findings of this study. However, Achary et al (2014) reported 219 marine phytoplankton species in Bacillariophyta, Cyanophyta and Dinophyta group from the coastal waters of southwest Bay of Bengal that was different from the current study. This might be varied because of seasonal differences since Achary et al ( 2014) collected samples for one year covering all seasons.…”

Section: Phytoplankton Identificationcontrasting

confidence: 99%

“…Globally, many studies have been conducted to determine phytoplankton compositions, abundances, distribution and diversity in different seas (e.g., Eker-Develi and Kideys, 2003;Guo et al, 2014;Ismael, 2015;Polikarpov et al, 2016;etc.). Some studies are also conducted in the vicinity of the Bay of Bengal, however, most of them are focused on Indian coastal waters (e.g., Sarojini and Sarma, 2001;Madhav and Kondalarao, 2004;Achary et al, 2014;Baliarsingh et al, 2016;etc. ) Islam and Aziz (1975) and Aziz and Islam (1979) assessed the marine phytoplankton distribution in the north-eastern Bay of Bengal of Bangladesh, but it was very fragmented that needs to be updated.…”

Section: Introductionmentioning

confidence: 99%

Species Composition, Abundance and Diversity of Phytoplankton Inhabiting around the Swatch-of-No-Ground of Northern Bay of Bengal

Yasmin

Ahmed

Khondkar

et al. 2021

Dhaka Univ J Earth Env Sci

View full text Add to dashboard Cite

This study aimed to estimate the abundance and diversity of phytoplankton at different depth of water columns in Northern Bay of Bengal, Bangladesh. Samples were collected from 24 stations using Niskin water sampler from 0 to 250 m depths in four different cruises from January, 2017 to January, 2018 with the collaboration of Bangladesh Navy. Before sample identification, the samples were subjected to preservation using Lugol’s solution. A total of 70 phytoplankton species were identified of which Bacillariophyceae, Dinophyceae and Chlorophyceae covered 74.28%, 21.42% and 4.28% of species, respectively. The average phytoplankton density was 12,238±7,281 cells/L. Results showed phytoplankton abundance and distribution was comparatively lower in higher water depth than surface water. The highest phytoplankton abundance (39,342 cells/L) was recorded at surface water and the lowest abundance (16 cells/L) was observed in 200 m depth. Phytoplankton abundances significantly reduced at higher water depths (p < 0.05) which might be associated with higher light and nutrients availability at surface water and mixed layer depth. However, there was weak negative correlation since r = - 0.33. Phytoplankton abundance was also varied from station to station at similar water depth. Species richness was the highest in surface water. In this study, estimated Shannon-Wiener index was 0.58 that represented phytoplankton was moderately distributed at surface water than higher depth. The findings of the present study might be used as a baseline study to understand the phytoplankton community of the Northern Bay of Bengal which directly and/or indirectly help to manage existing ecosystem and sustainable fisheries of the Bay of Bengal. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 10(1), 2021, P 11-21

show abstract

“…Low N:P supply ratios may result in a significant shift in the phytoplankton assemblage to a community dominated by N-fixing cyanobacteria and a supply of atmospheric N 2 estimated to be up to 60% of total supply (Vrede et al, 2009). Achary et al (2014) reported that the comparison of ambient nutrient ratios with the Redfield ratio (N/P =16:1) showed a clear temporal variation in the factors that regulate the phytoplankton 0 1 2 3 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 growth. The dry season was evident to have an acute N-limitation for algal growth whereas P-limitation was encountered during the wet season.…”

Section: Nutrients Parametersmentioning

confidence: 99%

Assessment of Physico-Chemical Properties of the Pasur River Estuarine Water

Shefat

Chowdhury

Haque

et al. 2021

Ann. Bangladesh Agric.

View full text Add to dashboard Cite

This study aimed to investigate physico-chemical properties of the Pasur River Estuarine (PRE) water connected to the Sundarbans mangrove ecosystem during the dry season for examining the ecosystem health. In-situ measurement and water sample collection were performed to assess physico-chemical properties at fifteen sampling stations along the main axis of the estuary in March 2018, April 2018, January 2019 and March 2019. Surface water temperature ranged from 20.7 to 33.7°C, pH from 7.1 to 7.9, and salinity from 8.5 to 16.2 PSU (practical salinity unit). Dissolved Oxygen (DO) concentration varied from 5.9 to 8.4 mg/L. Ammonium-nitrogen (NH4 +) was the dominant nitrogenous compound among the dissolved inorganic nitrogenous (NH4 + +NO3 -+NO2 -) compounds, and ranged from 0.11 to 2.11 mg/L. Higher NH4 + concentration in water column was largely attributed to release by tidal wash-out of the interstitial waters of the surﬁcial mangrove sediments. In contrast, phosphate concentration varied from 0.07 to 5.8 mg/L. The Pearson correlation coefficient was calculated to elucidate the correlation among physico-chemical properties during the dry season. Temperature showed a significant positive correlation with salinity and total dissolved solids (TDS), and negative correlation with DO. Similarly, salinity showed a significant positive correlation with TDS and negative correlation with DO. According to the Redfield ratio, the PRE is a nitrogen-limited estuarine system during the dry season. Ann. Bangladesh Agric. (2020) 24(1) : 1-16

show abstract

Nutrient dynamics and seasonal variation of phytoplankton assemblages in the coastal waters of southwest Bay of Bengal

Cited by 38 publications

References 34 publications

Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal

Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal

Species Composition, Abundance and Diversity of Phytoplankton Inhabiting around the Swatch-of-No-Ground of Northern Bay of Bengal

Assessment of Physico-Chemical Properties of the Pasur River Estuarine Water

Contact Info

Product

Resources

About