Phytoplankton and nutrient dynamics of shallow coastal stations at Bay of Bengal, Eastern Indian coast

Choudhury, A. K.; Pal, Ruma

doi:10.1007/s10452-009-9252-9

Cited by 54 publications

(26 citation statements)

References 30 publications

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“…In a natural system, pH is primarily determined by the concentration of alkali metals in the ionic forms (Na + , K + , Cl − ) with higher concentrations resulting in higher pH (Hinga 2002). The pH pattern observed in the present investigation was quite similar to the findings of Choudhury and Pal (2010), but a high pH value of 8.06 was observed in the present study, whereas the maximum pH value of 7.6 was reported along the Digha coastal waters by Choudhury and Pal (2010). Lower pH values observed in the monsoon season may be due to the heavy rainfall and land runoff (Gopalan et al 1987;Nair et al 1988).…”

Section: Discussionsupporting

confidence: 87%

“…SST is an important physical characteristic of coastal waters as it decides the solubility of gases and salts and regulates the growth of plants and animals (Jansi 2004) and would be significantly influenced by atmospheric temperature in the study area. This is quite evident from the observations of Choudhury and Pal (2010), where the water temperature reached a maximum value of 30°C in the months of July and August in the coastal waters of Digha. The monsoon season in the coast of West Bengal has a period of 4 months starting from June to September (Choudhury and Pal 2010).…”

Section: Discussionmentioning

confidence: 61%

“…This is quite evident from the observations of Choudhury and Pal (2010), where the water temperature reached a maximum value of 30°C in the months of July and August in the coastal waters of Digha. The monsoon season in the coast of West Bengal has a period of 4 months starting from June to September (Choudhury and Pal 2010). Variations in ocean temperatures will undoubtedly influence the marine ecosystems and reduce fishery productions (IPCC 2002).…”

Section: Discussionmentioning

confidence: 61%

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Current status of seawater quality in Digha (India), northwestern coast of the Bay of Bengal

Pitchaikani

Kadharsha

Mukherjee

2016

Environ Monit Assess

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The present investigation was intended to assess the seawater quality of Digha (India) in the northwestern coast of the Bay of Bengal. Digha is a meso-tidal coastal plain located between two major estuarine systems, i.e. Subarnarekha and Hooghly located respectively on the western and eastern sides of the West Bengal along the northeast coast of India. The sampling was made at nine stations at various distances. Significant seasonal variations in environmental parameters and nutrients were observed during the study period. Analyses of physicochemical characteristics of the study area indicated that the level of dissolved oxygen (DO), biological oxygen demand (BOD), total dissolved solid (TDS) and nutrients is within the permissible limit. The results clearly revealed that, though sewage discharge takes place in the coastal waters, the quality of the water was not affected. It may be due to the large quantity of estuarine water input from the Hooghly estuarine system that have enhanced dilution of discharged sewage in Digha coastal waters. Strong tidal activities, wave dynamics and coastal current further dilute the effluent water in the study area, resulting to the minimised sewage effect on coastal ecosystem. Further studies on the heavy metal concentration and benthic diversity can be assessed to understand the health of the ecosystem.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 61%

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Current status of seawater quality in Digha (India), northwestern coast of the Bay of Bengal

Pitchaikani

Kadharsha

Mukherjee

2016

Environ Monit Assess

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“…Data not shown Bay of Bangal, Indian [7] was not limited. Even among the same genus, such as C. atomus and C. meneghiniana, S. hantzschii, and S. minutulus, diatoms expressed different nutrient strategies to cope with P i -limited conditions.…”

Section: Growth and Nutrient Strategies Of Diatoms Under Turbulent Comentioning

confidence: 99%

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

2011

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Diatom blooms occur in many water bodies worldwide, causing significant ecological and social concerns. In order to understand the mechanisms of diatom blooms formation, the effects of varying phosphorus (P) concentration and hydrodynamics on the growth of diatoms were studied by combining results from field observations and laboratory experiments. The field investigation showed that spring diatom blooms (Cyclotella meneghiniana and Stephanodiscus hantzschii) occurred in Lake Taihu and Hanjiang River with similar environmental factors such as water temperature, pH, and dissolved oxygen in 2008. Concentrations of total phosphorus (TP), total nitrogen, and ammonia nitrogen (NH 4 -N) in Lake Taihu were significantly higher than the concentrations in the Hanjiang River. Laboratory experiments were conducted to evaluate growth and physiological responses of four lotic diatoms (Cyclotella atomus, Fragilaria crotonensis, Nitzschia palea, and S. hantzschii, isolated from the Hanjiang River) and three lentic diatoms (C. meneghiniana, Melosira varians, and Stephanodiscus minutulus, isolated from Lake Taihu, Lake Donghu, and Guanqiao Pond, respectively) to various P concentrations under smallscale turbulent and standing conditions. Our results showed that, with turbulence, lotic diatoms C. atomus, F. crotonensis, N. palea, and S. hantzschii demonstrated a significant increase in affinity for P compared with lentic diatoms C. meneghiniana, M. varians, and S. minutulus. Moreover, lotic diatoms C. atomus, F. crotonensis, and N. palea had higher growth rates and photosynthetic efficiencies with small-scale turbulence than with standing conditions both in P-limited and P-replete conditions. Lotic species S. hantzschii and three lentic diatoms (C. meneghiniana, M. varians, and S. minutulus) grew well under standing conditions. Our results may explain our field observation that the occurrence of diatom blooms in lakes is often associated with higher TP concentrations whereas in rivers, diatom blooms occur at a wide range of TP concentrations under flows. Therefore, different hydrodynamics and nutrient concentrations determined the dominant diatom species, according to their habitat-dependent physiological characteristics.

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“…Eurythermal and euryhaline nature of diatoms in all the three season leads to their dominance [32] and have been observed to bloom regularly along the Indian Coast during June to October [33,34]. Dominance of diatom over dinoflagellates coincides to the report from Indian coastal water [35][36][37] and world oceans [38,39]. A cosmopolitan genus such as Chaetoceros was dominant with 15 species followed by other major genera such as Coscinodiscus (6 species), Nitzschia (3 species) and Rhizosolenia (4 species) in this study.…”

mentioning

confidence: 55%

Checklist, Qualitative and Quantitative Analysis of Marine Microalgae from Offshore Visakhapatnam, Bay of Bengal, India for Biofuel Potential

Selvakumar¹,

Shameem²,

Umadevi³

et al. 2018

Microalgal Biotechnology

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Observation on the productivity parameters in relation to micro algal biodiversity helps to know the population in particular season and spatial. The study investigates in detail the seasonal and spatial variation of microalgae with special emphasis on their interrelationship of chlorophyll concentration. In order to obtain the information on distribution and abundance of Visakhapatnam Coast microalgae for isolation, fortnightly intervals samplings was carried out. Investigation has been made on the microalgae with special reference to the phylum Ochrophyta, Dinophyta, Chlorophyta, Euglenozoa, Haptophyta and Cyanophyta. Abundance of species under different season of pattern was Pre-monsoon>Post monsoon>Monsoon. The data evaluated from this study was used to prepare the checklist for marine microalgal diversity of Visakhapatnam offshore region.

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Phytoplankton and nutrient dynamics of shallow coastal stations at Bay of Bengal, Eastern Indian coast

Abstract: Phytoplankton dynamics of Eastern Indian coast was studied from surface water for a period of 24 months (

Cited by 54 publications

References 30 publications

Current status of seawater quality in Digha (India), northwestern coast of the Bay of Bengal

Current status of seawater quality in Digha (India), northwestern coast of the Bay of Bengal

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

Checklist, Qualitative and Quantitative Analysis of Marine Microalgae from Offshore Visakhapatnam, Bay of Bengal, India for Biofuel Potential

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