Avik Kumar Choudhury

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Verified

Avik verified their affiliation via an institutional email.

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• PhD
• Professor (Assistant) at Ramakrishna Mission Vivekananda Centenary College

Phytoplankton dynamics of Eastern Indian coast was studied from surface water for a period of 24 months (April 2005-March 2007) in relation to environmental variables like, temperature, pH, dissolved oxygen, biochemical oxygen demand (BOD), salinity and nutrient contents-including nitrate, phosphate and silicate. Total 43 taxa were recorded during...

Due to the close proximity of the Bay of Bengal and the freshwater inflow of Bhagirathi-Hooghly, Diamond Harbour appeared as an important coastal station of the Bhagirathi-Hooghly estuary. The spatial and temporal composition and abundance of microphytoplankton species was examined in relation to physical and chemical surface water variables (i.e.,...

Health of natural aquatic ecosystems has become a cause of concern in recent times due to uncontrolled anthropogenic influences. So, the importance of monitoring the health of aquatic ecosystems has become a cause of concern like never before. However, monitoring of water through physical or chemical parameters is time consuming and not cheap. To t...

In the past few decades, “Climate Change” has emerged as one of the biggest concerns for scientists, ecologists, and environmentalists as well as for the common people. The main reason of changing climate is global warming. The increase of global temperature triggers different phenomenon like melting of glaciers and rise in sea level, increase in s...

Understanding the impact of cyclonic events on mangrove vegetation changes in Indian Sundarbans using Remote Sensing based analytical tools.

Mangrove ecoregions of the Indian Sundarbans (IS) are highly productive ecosystems in the Bengal delta of the Indian subcontinent. These mangroves are crucial in reducing the negative consequences of extreme environmental events like excessive wave movements and periodic storm surges, in addition to serving as an important habitat for a variety of...

Algae and a diverse array of photosynthetic protists have long been recognized as primary producer of aquatic ecosystem and as important sentinel for documentation of pollution status of both lotic and lentic habitats. However, from the later part of twentieth century, these algal forms inclusive of both micro- and macroscopic entities have been ex...

Excessive population outbursts and associated xenobiotic interventions contribute overproduction of waste materials across the world. Among these waste materials biomedical wastes (BMW) make a significant contribution. The huge accumulation of BMW is not only meant for successive environmental pollution but increases health hazards by cross-contami...

Diatoms are the most abundant microscopic unicellular protists in natural lotic ecosystems. They are the major component of the producer community in aquatic ecosystems that also play important roles in biostratigraphy, paleoclimatology and overall ecosystem functioning. In recent times as ultrastructural details of diatom frustule has been establi...

The Bhagirathi–Hooghly estuary represents one of the most populated estuaries in the Indian subcontinent with dense settlements along its course. The concomitant high anthropogenic influences and enhancement of nutrient load due to uncontrolled discharges from non-point source in monsoon play important role in habitat variability and consequential...

The present study aims at finding out the implications of seasonal precipitation in bringing about habitat variability in Sundarbans, the world's largest mangrove ecoregion. This work takes into consideration datasets of 2010 and 2013 from a long term dataset that is presently being collected for Sundarbans mangrove ecoregion (SBOTS - Sundarbans Bi...

The present work aims at understanding the importance of Brzezinski–Redfield ratio (modified Redfield ratio) as a determinant of natural phytoplankton community composition in a mangrove ecosystem. Even though this ecoregion has been reported to be mostly eutrophic, localised and anthropogenic influences often result in habitat variability especial...

Phytoplankton based studies have become a major area of research among plankton biologists in recent times as a responsive entity for climatic change. Sundarbans ecoregion has gained considerable impetus in context of the Indian subcontinent as a major study area due to the mixing conditions prevalent in this area, brought about by the confluence o...

Near shore surface water (0.5 m) of an estuarine station along eastern Indian coast was studied for the first time to understand the seasonal composition, distribution and assemblage patterns of micro phytoplankton in relation to different environmental variables. Regular samplings at bi weekly intervals for micro phytoplankton and water samples we...

The book , ‘An Introduction to Phytoplanktons - Diversity and Ecology’ is very useful as it covers wide aspects of phytoplankton study including the general idea about cyanobacteria and algal kingdom. It contains different topics related to very basic idea of phytoplanktons such as, types ,taxonomic description and the key for identification etc. T...

Several reports are available from different ecological niche. An important example is the Mediterranean region where most of the water bodies represent oligotrophic condition. Many works have concentrated on the Eastern Mediterranean Sea, an extreme oligotrophic environment (Krom et al. 2003) at the far end of a prominent west–east with increasing...

‘Phytoplanktons’ are free-floating, photosynthetic, aquatic microorganisms, which move from one place to another, either actively by their locomotory organs (flagella) or passively by water currents. The name ‘phytoplankton’ came from the Greek words ‘φυτόν’ (phyton), meaning ‘plant’, and ‘πλαγκτός’ (planktos), meaning ‘wanderer’ or ‘drifter’. The...

Phytoplankton communities in aquatic ecosystems are the most important component that varies significantly on the basis of the available environmental conditions and trophic status of the habitat. Thus, analysis of the phytoplankton community is highly indicative of the condition of the habitat. Interpretation of plankton data from an ecological pe...

Phytoplanktons have a unique ability to sequester dissolved as well as free carbon dioxide from aquatic ecosystems and convert them as storage product. This phenomenon is regarded as the primary productivity of that ecosystem. As proposed by Field et al. (1998), about 50 % of global productivity through carbon sequestration is carried out in aquati...

Phytoplankton dynamics of coastal West Bengal with special reference to bioaccumulation of heavy metals Abstract Phytoplankton dynamics in response to environmental variables (pH, temperature, salinity), nutrients [nitrate, nitrite, ammonia, Dissolved Inorganic Nitrogen (DIN), Dissolved Inorganic Phosphate (DIP), Dissolved Silicate (DSi)], producti...

Diversity of major planktonic diatoms along the coast of West Bengal has been studied for two years (April 04-06) and their taxonomic accounts have been given. The phytoplankton population was represented mainly by diatoms, constituting more than 90% of the total population. Among the diatom genera, blooms of Asterionella japonica were observed at...