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Gogoi P, Das SK, Jana C, Das BK, Saha A, Ramteke K, Jaiswar AK, Samanta S, Roshith CM. Assessing the trophic status of a tropical microtidal estuary applying TRIX and Random Forest - A combined approach. Mar Pollut Bull 2024; 200:116126. [PMID: 38330813 DOI: 10.1016/j.marpolbul.2024.116126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
The present study assessed the trophic status of a medium-sized microtidal estuary, Rushikulya, India using a combination of mutimetric trophic indices (TRIX, TRBIX) and a machine learning approach (Random Forest). A total of 108 samples were considered to build a predictive model for chlorophyll a (Chl a) and 17 response water variables by observing two annual periods (2021-2023) at six sampling sites. Mean values of TRIX (5.04 ± 0.72) and TRBIX (0.17 ± 0.08) reflected that the estuary has a moderate degree of eutrophication with 'good' water quality and 'biomass saturated'. However, the threshold of TRIX represents a transition state from 'moderate' to 'high' eutrophic. Random Forest model reflected that no apparent association between Chl a and water turbidity above 30 NTU and eutrophication in the estuary fluctuated mainly due to PO43--P along with electrical conductivity. Linear statistical correlations showed high correlation between Chl a and conductivity and a negative correlation between Chl a and dissolved oxygen, unlike PO43--P.
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Affiliation(s)
- Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Sanjoy Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Chayna Jana
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India.
| | - Ajoy Saha
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Karankumar Ramteke
- ICAR-Central Institute of Fisheries Education, Versova, Mumbai 400061, Maharastra, India
| | - A K Jaiswar
- ICAR-Central Institute of Fisheries Education, Versova, Mumbai 400061, Maharastra, India
| | - S Samanta
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - C M Roshith
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
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Saha A, Das BK, Sarkar DJ, Samanta S, Vijaykumar ME, Khan MF, Kayal T, Jana C, Kumar V, Gogoi P, Chowdhury AR. Trace metals and pesticides in water-sediment and associated pollution load indicators of Netravathi-Gurupur estuary, India: Implications on coastal pollution. Mar Pollut Bull 2024; 199:115950. [PMID: 38183833 DOI: 10.1016/j.marpolbul.2023.115950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/15/2023] [Accepted: 12/15/2023] [Indexed: 01/08/2024]
Abstract
Various environmental indicators were used to evaluate the water and sediment quality of the Netravathi-Gurupur estuary, India, for trace metals and pesticide pollution. The descended order of studied metal concentrations (μg/L) in the water was Fe (592.71) > Mn (98.35) > Zn (54.69) > Cu (6.64) > Cd (3.24) > Pb (2.38) > Cr (0.82) and in sediment (mg/kg) was Fe (11,396.53) > Mn (100.61) > Cr (75.41) > Zn (20.04) > Cu (12.77) > Pb (3.46) > Cd (0.02). However, pesticide residues were not detected in this estuarine environment. The various metal indexes categorised the water as uncontaminated, whereas contamination factor, enrichment factor, geo-accumulation index, degree of contamination and pollution load index indicated low to moderate sediment contamination. Multivariate statistics showed that the dominance of natural sources of trace metals with little anthropogenic impact. Improvement in water/sediment quality during the study period might be due to COVID-19 imposed lockdown.
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Affiliation(s)
- Ajoy Saha
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India.
| | - B K Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - D J Sarkar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - S Samanta
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - M E Vijaykumar
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - M Feroz Khan
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - Tania Kayal
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - Chayna Jana
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - Vikas Kumar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
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Basu S, Gogoi P, Chanda A. An accidental encounter with bloom of diatom Palmerina hardmaniana (Greville) Hasle in Sundarbans, India: Impact on zooplankton community structure in tidal creek environment. Mar Pollut Bull 2024; 199:115935. [PMID: 38118396 DOI: 10.1016/j.marpolbul.2023.115935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/08/2023] [Accepted: 11/21/2023] [Indexed: 12/22/2023]
Abstract
The present study reports on a transient diatom bloom of Palmerina hardmaniana (Greville) Hasle 1996 encountered accidentally in May 2018 in the world's largest mangrove forest of Sundarbans, India. This bloom was the sixth record of diatom blooms from Indian coastal waters and the fourth from Sundarbans waters. The diatom cell count ranged from 2.571 × 104 to 6.857 × 104 cells L-1 during the bloom. The zooplankton taxa count decreased from 39 during the pre-bloom to 30 during bloom and 31 during the post-bloom phase. However, no significant (p < 0.05) change in zooplankton species richness was observed between the three different phases. The consistent occurrence of copepod Bestiolina simlis across sampling points indicated a high tolerance to environmental parameters. The zooplankton population also did not respond vehemently to bloom-forming P. hardmaniana in this creek environment. These observations warrant further studies to examine the effect of blooms on the overall marine ecological food chain of creek ecosystems.
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Affiliation(s)
- Sanghamitra Basu
- School of Environmental Studies, Jadavpur University, Jadavpur, Kolkata, India; Department of Zoology, Sarojini Naidu College for Women, Dumdum, Kolkata, India.
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, WB, India
| | - Abhra Chanda
- School of Oceanographic Studies, Jadavpur University, Jadavpur, Kolkata, India
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Kumar J, Alam A, Borah S, Gogoi P, Das BK. Influence of barrages on hydrological parameters and functional groups of phytoplankton of a subtropical river Ganga, India. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-27864-8. [PMID: 37256395 DOI: 10.1007/s11356-023-27864-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 05/20/2023] [Indexed: 06/01/2023]
Abstract
The current study used phytoplankton functional groups (FGs) to assess the impact of barrages on the ecological function of subtropical river Ganga. A total of 101 phytoplankton species were identified, including 20 phytoplankton FGs with MP and D having the highest prevalence rates of more than 50%. Other FGs with higher occurrence rates, such as N, A, and J, displayed seasonal and spatial advantages on occasion, indicating the randomness of exogenous influx from catchment areas. Based on phytoplankton FGs similarities, a non-metric multidimensional scaling analysis (NMDS) revealed geographical and seasonal discrepancies. The higher concentration of chemical components in Kanpur was linked to decreased water discharged from preceding reservoirs, resulting in a highly polluted stretch in terms of spatial variation, according to our findings. During the monsoon season, however, the diluting process caused by precipitation and surface runoff significantly improved water quality. As a result, we hypothesized that a sequence of barrages alters the hydrological characteristics of cascading reservoirs, which was related to spatial and seasonal fluctuation in FG diversity and phytoplankton FGs could be useful bioindicators of water quality. In conclusion, the phytoplankton FGs approach is useful for identifying the geographical and seasonal aspects of aquatic ecosystems that are heavily influenced by human activities, but its sensitivity to changes in spatial and seasonal water quality warrants more exploration.
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Affiliation(s)
- Jeetendra Kumar
- ICAR-Central Inland Fisheries Research Institute, 24, Panna Lal Road, Allahabad, 211002, Uttar Pradesh, India.
| | - Absar Alam
- ICAR-Central Inland Fisheries Research Institute, 24, Panna Lal Road, Allahabad, 211002, Uttar Pradesh, India
| | - Simanku Borah
- ICAR-Central Inland Fisheries Research Institute Regional Center, HOUSEFEED Complex, Dispur (Last Gate), Guwahati, 781006, Assam, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, CGO Complex (2Nd Floor, C-Wing), DF Block, Salt Lake, Kolkata, 700 064, West Bengal, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, West Bengal, India
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Nair SM, Muhammadali SA, Koushlesh SK, Chanu TN, Das SK, Bhakta D, Pillai VG, Gogoi P, Samanta S, Meetei WA, Baitha R, Kamble SP, Kumar V, Das BK. Probing river health status: a study based on index of biotic integrity (IBI) in Tapti River of Deccan plateau, India. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-27497-x. [PMID: 37184785 DOI: 10.1007/s11356-023-27497-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 05/04/2023] [Indexed: 05/16/2023]
Abstract
Anthropogenic activities impacted the ecological health of rivers by altering the physical habitat and water flow as well as by pollution. Monitoring of biotic groups for gauging the river health is a prerequisite for assessing the extent of degradation and formulating management guidelines for river restoration. An assessment using fish-based index of biotic integrity (IBI) was carried out in the Central Indian river, Tapti, for probing its health status. For the multimetric index, twelve metrics were adopted under five categories: taxonomic richness, habitat composition, tolerance indicators, species resilience, and trophic composition. Among the studied sites, Betul in the upper stretch was selected as the reference site for River Tapti, which almost meets the upper expectation of the metrics explored. Continuous scoring method was applied to evaluate the biotic integrity in the selected sites of the river. The IBI score based on the pooled fish abundance data in River Tapti ranged from 33 to 60. Assessment of the ecological health revealed that three-fourth of the river stretch was moderately impaired (25-50% of impairment) and the most deteriorated site was Kamrej with 45% of impairment which might be due to its location in the urban area with high influx of domestic sewage and industrial effluents. The IBI scores were plotted and compared with an independent estimate of water quality. The CCA with environmental and IBI variables revealed higher correlation with each other and the functional groups such as carnivores, herbivores, and fishes with high population doubling time (PDT) were found in close association with nitrate-N, total alkalinity, and specific conductivity. The study urges the need for the adoption of proper management and mitigation measures to restore the health and wealth of aquatic ecosystem.
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Affiliation(s)
| | | | - Satish Kumar Koushlesh
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Thangjam Nirupada Chanu
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Sanjoy Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Dibakar Bhakta
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | | | - Pranab Gogoi
- Kolkata Centre of ICAR-CIFRI, CGO Complex, DF Block, Salt Lake, Kolkata, West Bengal, 700 064, India
| | - Srikanta Samanta
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Wakambam Anand Meetei
- Vadodara Research Station of ICAR-CIFRI, GOTRI Campus, Vadodara, Gujarat, 390 021, India
| | - Raju Baitha
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Suhas Prakash Kamble
- Vadodara Research Station of ICAR-CIFRI, GOTRI Campus, Vadodara, Gujarat, 390 021, India
| | - Vikas Kumar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Monirampore, Kolkata, West Bengal, 700 120, India
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Sahu SK, Das Sarkar S, Gogoi P, Naskar M. A Geostatistical Framework Predicting Zooplankton Abundance in a Large River: Management Implications towards Potamoplankton Sustainability. Environ Manage 2023; 71:1037-1051. [PMID: 36609869 DOI: 10.1007/s00267-023-01784-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
The zooplankton community is a widely used bioindicator for the biological assessment of riverine aquatic ecosystems. Phyto-zooplankton interaction and spatially varying river environment parameters perceivably govern their spatial distribution in a large river. This invites the challenge of predicting zooplankton abundance along the river channel. The present article has proposed a geostatistical framework to predict zooplankton abundance along the river course while decoupling phyto-zooplankton relationship from spatial dependency. The strength of secondary data on the river Narmada-a large tropical river in India-has been utilised to accomplish the goal. The nonlinear logistic regression kriging has been found to be the most effective framework. The phyto-zooplankton relationship captured 66% of zooplankton variability, having moderate (37%) residual spatial dependence. The results have shown longitudinally fluctuating spatial variability, which supports the river serial discontinuity concept. The proposed framework has generated smooth zooplankton abundance and sustainability predictive maps that have allowed detection of the change point locations of zooplankton abundance. The map has precisely identified the most productive zone of zooplankton sustainability. The study also has appraised obtaining approximate data in the areas where sampling is infeasible, which will be helpful for location-specific management strategies on a lower spatial scale.
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Affiliation(s)
- Sanjeev Kumar Sahu
- ICAR-Central Inland Fisheries Research Institute Barrackpore, Kolkata, 700120, West Bengal, India
| | - Soma Das Sarkar
- ICAR-Central Inland Fisheries Research Institute Barrackpore, Kolkata, 700120, West Bengal, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute Barrackpore, Kolkata, 700120, West Bengal, India
| | - Malay Naskar
- ICAR-Central Inland Fisheries Research Institute Barrackpore, Kolkata, 700120, West Bengal, India.
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Kumar J, Alam A, Jha DN, Gogoi P, Borah S, Das BK. Impact of barrages on assemblage pattern of phytoplankton in tropical river Ganga, India. Environ Monit Assess 2022; 194:804. [PMID: 36123550 PMCID: PMC9484718 DOI: 10.1007/s10661-022-10484-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
The occurrence, abundance, and distribution of phytoplankton have been investigated upstream and downstream of three barrages on the river Ganga at Bijnor, Narora, and Kanpur in Uttar Pradesh, India. A total of 104 phytoplankton species belonging to eight phyla (Bacillariophyta, Charophyta, Chlorophyta, Cryptophyta, Cyanophyta, Euglenophyta, Miozoa, and Ochrophyta) were identified during the sampling period. During the summer, monsoon, and post-monsoon seasons, the density of phytoplankton (Ind. L-1) ranged from 9.6 × 104 to 2.03 × 107, 9.6 × 104 to 4.5 × 105, and 2.2 × 105 to 2.17 × 106, respectively. The species abundance and the relative abundance showed an increasing trend from the first (Bijnor) to the third (Kanpur) barrage, suggesting a gradual decrease in river flow and an increase in residence time. Phytoplankton cell density in Kanpur, however, was unexpectedly higher and showed eutrophic conditions attributable to elevated organic load and surplus nutrients from the land runoff. One-way ANOVA (post-hoc Tukey test) showed statistically significant (p < 0.05) seasonal variation in temperature, transparency, free CO2, PO43-, and dissolved organic matter. Analysis of Pearson's correlation coefficient suggested a statistically significant correlation (p < 0.05) of mostly phytoplanktonic groups with free CO2, CO32-, HCO3-, Cl-, specific conductivity, total dissolved solids, total hardness, Mg2+, PO43-, and SiO44-. The minimum species diversity was recorded during the monsoon season, while the maximum diversity was reported during the post-monsoon season which might be due to high nutrient load and a high concentration of PO43- post-monsoon. We concluded that aquatic biodiversity and ecological structure could be adversely influenced by a series of obstructed barrages and dams, which influenced the assemblage pattern of phytoplankton communities.
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Affiliation(s)
- Jeetendra Kumar
- ICAR-Central Inland Fisheries Research Institute 24, Panna Lal Road, Allahabad-211002, Uttar Pradesh, India.
| | - Absar Alam
- ICAR-Central Inland Fisheries Research Institute 24, Panna Lal Road, Allahabad-211002, Uttar Pradesh, India
| | - Dharm Nath Jha
- ICAR-Central Inland Fisheries Research Institute 24, Panna Lal Road, Allahabad-211002, Uttar Pradesh, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, CGO Complex, (2nd floor, C-Wing), DF Block, Salt Lake, Kolkata, 700064, West Bengal, India
| | - Simanku Borah
- ICAR-Central Inland Fisheries Research Institute Regional Center, HOUSEFEED Complex, Dispur (Last Gate), Guwahati, 781006, Assam, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, West Bengal, India
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Basu S, Gogoi P, Bhattacharyya S, K LK, Das SK, Das BK. Variability in the zooplankton assemblages in relation to environmental variables in the tidal creeks of Sundarbans estuarine system, India. Environ Sci Pollut Res Int 2022; 29:45981-46002. [PMID: 35157203 DOI: 10.1007/s11356-022-19136-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/05/2022] [Indexed: 06/14/2023]
Abstract
The present study illustrates a holistic account of zooplankton community dynamics in relation to physicochemical variables in the tidal creeks of Indian Sundarbans estuarine system. Eleven water variables and zooplankton samples were collected in a monthly basis from the six sampling locations between July 2016 and June 2018. Out of the 11 water parameters, seven parameters (temperature, salinity, dissolved oxygen, turbidity, PO4 - P, NO3 - N, and NO2 - N) varied significantly (p ≤ 0.05) among seasons. A total of 63 zooplankton taxa were recorded with the predominance of Copepoda. Permutational multivariate analysis of variance (PERMANOVA) depicted the significant variations of zooplankton population both spatially (F = 2.313; p = 0.001) and temporally (F = 6.107; p = 0.001). Out of the 41 species of Copepoda recorded, 14 species (Paracalanus parvus, Parvocalanus dubia, Bestiolina similis, Acrocalanus gibber, A. gracilis, Acartia erythraea, A. spinicauda, Pseudodiaptomus serricaudatus, P. annandalei, P. aurivilli, Oithona brevicornis, O. similis, Longipedia weberi and Microsetella norvegica) were indicated as "characterizing species" in the creek environment, which highlighted the euryhaline nature as well as broad range of thermal tolerance of these species. Acrocalanus longicornis, Eucalanus crassus, Candacia bradyi, and Acartia sewelli were specifically found in pre-monsoon; Euterpina acutiformis, Clytemnestrata rostrata, Acartia plumosa, and Canthocalanus pauper were specific to post-monsoon season, whereas Mesocyclops leuckarti, Temora turbinata, and Temora discaudata were found only during monsoon. Thus, it explains the limited period of existence, highlighting the temporal shift in species abundance in the creeks. Overall, the calculated mean value of α-diversity (d' = 4.07; H' = 2.31) indicated a "good" zooplankton diversity in the creeks. The biota-environmental relationship following canonical correspondence analysis revealed that variables, viz., water temperature, turbidity, and NO3 - N, were the explanatory variables during monsoon; pH and DO in post-monsoon; PO4 - P, SiO4 - Si, and salinity in pre-monsoon that explained the variations of zooplankton community compositions in the creeks. The variables (PO4 - P, NO3 - N, and SiO4 - Si) that are correlated to the zooplankton community implied their indirect effect on the distribution of zooplankton by supporting the phytoplankton succession and production in the mangrove-dominated creeks.
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Affiliation(s)
- Sanghamitra Basu
- School of Environmental Studies, Jadavpur University, Kolkata, 700032, India.
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Kolkata Centre, C.G.O. Complex, 2nd Floor, Sector 1, Kolkata, 700 064, West Bengal, India
| | | | - Lohith Kumar K
- ICAR-Central Inland Fisheries Research Institute, Manirampore, Barrackpore, Kolkata, 700120, West Bengal, India
| | - Sanjoy Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Manirampore, Barrackpore, Kolkata, 700120, West Bengal, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Manirampore, Barrackpore, Kolkata, 700120, West Bengal, India
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Gogoi P, Chanu TN, Sinha A, Ramteke MH, Tayung T, Roy A, Das BK. Fish assemblage pattern, seasonality and their interaction with environmental variables: insights from canals of Sundarbans, India. Trop Ecol 2022. [DOI: 10.1007/s42965-022-00232-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Santhana Kumar V, Das Sarkar S, Das BK, Sarkar DJ, Gogoi P, Maurye P, Mitra T, Talukder AK, Ganguly S, Nag SK, Munilkumar S, Samanta S. Sustainable biodiesel production from microalgae Graesiella emersonii through valorization of garden wastes-based vermicompost. Sci Total Environ 2022; 807:150995. [PMID: 34666095 DOI: 10.1016/j.scitotenv.2021.150995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/17/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Biodiesel production from microalgae has gained significant interest recently due to the growing energy demand and non-renewable nature of petroleum. However, high cost of production and environmental health related issues like excess use of inorganic fertilizers, eutrophication are the major constraints in commercial-scale biodiesel production. Besides this, solid wastes (garden-based) management is also a global concern. In the present study, to overcome these limitations vermicompost extract was tested as nutrient source to enhance growth performance and lipid production from a freshwater microalga (Graesiella emersonii MN877773). Garden wastes were first converted into vermicompost manure and its extract (aerobic and anaerobically digested) was prepared. The efficacy of the extract was then tested in combination with BG11 medium. The mixotrophic cultivation of microalgae in anaerobically digested vermicompost extract at 50:50 combination with BG11 medium enhanced the cell biomass (0.64 g d. wt. L-1) and lipid productivity (3.18 mg L-1 day-1) of microalgae by two times. Moreover, the combination also improved the saturated (methyl palmitate) and monounsaturated fatty acids (oleic acid) content in the test algae. The quality of biodiesel also complies with all the properties of biodiesel standard provided by India, the USA, and Europe except the cold filter plugging property. The combination was also found to improve the cell biomass (0.041 g L-1) as compared to BG11 medium in mass-scale cultivation. Hence, the study proved that G. emersonii grown in media supplemented with garden waste-based vermicompost extract had significant potential for mass-scale biodiesel and bioproduct production.
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Affiliation(s)
- V Santhana Kumar
- Aquatic Environment Biotechnology and Nanotechnology, Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Soma Das Sarkar
- Fishery Resource Assessment and Informatics Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India.
| | - Dhruba Jyoti Sarkar
- Aquatic Environment Biotechnology and Nanotechnology, Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Pranab Gogoi
- Kolkata Centre of ICAR-Central Inland Fisheries Research Institute, CGO Complex, 2nd floor, C-Wing, DF Block, Salt Lake, Kolkata, Pin 700 064, West Bengal, India
| | - Praveen Maurye
- Aquatic Environment Biotechnology and Nanotechnology, Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Tandrima Mitra
- KIIT, School of Biotechnology, Campus-XI, Patia, Bhubaneswar, Pin 751024, Odisha, India
| | - Anjon Kumar Talukder
- Aquatic Environment Biotechnology and Nanotechnology, Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Satabdi Ganguly
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Subir Kumar Nag
- Fishery Resource Assessment and Informatics Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
| | - Sukham Munilkumar
- ICAR-Central Institute of Fisheries Education, 32, GN Block, Sector V, Bidhannagar, Kolkata, Pin 700091, West Bengal, India
| | - Srikanta Samanta
- Riverine and Estuarine Fisheries Division, Barrackpore, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, Pin 700120, West Bengal, India
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Gogoi P, Kumari S, Sarkar UK, Lianthuamluaia L, Puthiyottil M, Bhattacharjya BK, Das BK. Dynamics of phytoplankton community in seasonally open and closed wetlands in the Teesta-Torsa basin, India, and management implications for sustainable utilization. Environ Monit Assess 2021; 193:810. [PMID: 34783911 DOI: 10.1007/s10661-021-09587-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
The present study deals with the broader understanding of phytoplankton assemblage pattern and their ecohydrological interactions in two ecologically distinct floodplain wetlands of Teesta - Torsa basin, India. Analyses of data revealed significant seasonal variations (p ≤ 0.05) of ten water variables (temperature, transparency, pH, conductivity, total dissolved solids, dissolved oxygen, total hardness, total alkalinity, PO4 - P, and SiO4 - Si) in both the wetlands; however, no significant variation was observed among the sampling stations. In total, 128 species of phytoplankton were recorded (118 species belonging to 94 genera in seasonally open; 103 species belonging to 86 genera in closed wetland). Four algal groups, viz. Cyanophyceae, Coscinodiscophyceae, Bacillariophyceae, and Chlorophyceae, were the dominant quantitative component, remarkably influencing the total phytoplankton population in both the wetlands, contributing ~ 87% of total phytoplankton. Species Aulacoseira granulata alone contributed 12 - 41% and 8 - 34% to the total phytoplankton in the seasonally open and closed wetland, respectively, and indicated high organic load in both the wetlands. Altogether thirty-six and thirty-one phytoplankton taxa appeared as major indicators across the seasons for seasonally open and closed wetland, respectively. The indicator taxa (Aulacoseira, Oscillatoria, Dolichospermum, Spirogyra, Synedra, Nitzschia, Navicula, Euglena, Phacus) in both the wetlands hinted that the wetlands are under pollution pressure. The assemblage structure of phytoplankton was related to transparency, NO3 - N, PO4 - P, SiO4 - Si, total dissolved solids, and temperature as evident from BIO - ENV. Furthermore, the marginal test also selected similar variables (depth, transparency, conductivity, PO4 - P, SiO4 - Si) for seasonally open and the variables such as depth, conductivity, total dissolved solids, total alkalinity, and NO3 - N for the closed wetland. The study showed that the seasonal riverine connectivity greatly influences the variations in phytoplankton community in the seasonally open wetland.
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Affiliation(s)
- Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Kolkata Research Station, C.G.O. Complex, Salt Lake City, Sector - 1, Kolkata - 700064, West Bengal, India
| | - Suman Kumari
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
| | - Uttam Kumar Sarkar
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India.
| | | | - Mishal Puthiyottil
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
| | - Birendra Kumar Bhattacharjya
- ICAR-Central Inland Fisheries Research Institute, Regional Centre, Guwahati, HOUSEFED Complex, Dispur, Guwahati - 781006, Assam, India
| | - Basanta Kumar Das
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
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12
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Naskar M, Das Sarkar S, Sahu SK, Gogoi P, Das BK. Impact of barge movement on phytoplankton diversity in a river: A Bayesian risk estimation framework. J Environ Manage 2021; 296:113227. [PMID: 34261034 DOI: 10.1016/j.jenvman.2021.113227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 06/07/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
The adverse effect of barge movement on the river's aquatic ecosystem is of global concern. The phytoplankton community, a bioindicator, is possibly the foremost victim of the barge movement. This study hypothesized phytoplankton diversity loss induced by barge movement in a large river. This article presents a novel risk assessment framework to evaluate the hypothesis-with a goal to uncoupling phytoplankton diversity loss due to barge movement over a spatiotemporal scale. For this purpose, a study was conducted in the Bhagirathi-Hooghly stretch of Inland National Waterway 1 of India. This study has proposed a new index of diversity loss and its inferential framework based on full Bayesian Generalized Linear Mixed Model. The results have diagnosed significant barge-induced impact on the phytoplankton diversity and identified ten most impacted species. The proposed framework has successfully disentangled barge-induced phytoplankton diversity loss from the biological process and predicted a substantive overall risk of phytoplankton loss of 31.44%. Besides, it has uncoupled spatiotemporal differential estimates, suggesting a risk of diversity loss in order of 'During vs After' (38.0%) > 'Before vs After' (30.7%) > 'Before vs During' (24%) barge movement in temporal scale and increasing diversity loss along downstream. Finally, the instant study has highlighted the utility of these results to facilitate better water framework directive for inland waterways.
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Affiliation(s)
- Malay Naskar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India.
| | - Soma Das Sarkar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - S K Sahu
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - B K Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
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13
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Sarkar DJ, Das Sarkar S, Das BK, Praharaj JK, Mahajan DK, Purokait B, Mohanty TR, Mohanty D, Gogoi P, Kumar V S, Behera BK, Manna RK, Samanta S. Microplastics removal efficiency of drinking water treatment plant with pulse clarifier. J Hazard Mater 2021; 413:125347. [PMID: 33601144 DOI: 10.1016/j.jhazmat.2021.125347] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/18/2020] [Accepted: 02/04/2021] [Indexed: 05/22/2023]
Abstract
Microplastics are recognized as ubiquitous pollutants in aquatic environments; however, very little study is done on their occurrence and fate at drinking water treatment plants (DWTPs). Though, the toxic effect of microplastics on human health is not yet well established; there is global concern about their possible ill effect on the human. Hence, the present study evaluates the occurrence of microplastics at different treatment stages of a typical DWTP with pulse clarification and its removal efficiency. In the test DWTP, raw water, sourced from river Ganga, was found to contain microplastics 17.88 items/L. Cumulative microplastic removal at key treatment stages viz. pulse clarification and sand filtration was found to be 63% and 85%, respectively. The study also revealed higher microplastic abundance on the sand filter bed due to the screening effect. The most frequently occurring microplastics were fibers and films/fragments with polyethylene terephthalate and polyethylene as a major chemical type. The t-distributed stochastic neighbor embedding machine learning algorithm revealed a strong association between microplastic abundance with turbidity, phosphate and nitrate. The test DWTP with a pulse clarification system was having comparable microplastics removal efficiency with previously reported advanced DWTPs.
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Affiliation(s)
- Dhruba Jyoti Sarkar
- Aquatic Environmental Biotechnology and Nanotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India.
| | - Soma Das Sarkar
- Fisheries Resource Assessment and Informatics Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Basanta Kumar Das
- Aquatic Environmental Biotechnology and Nanotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India.
| | | | | | - Bidesh Purokait
- Indira Gandhi Water Treatment Plant, Palta, Kolkata 700120, India
| | - Trupty Rani Mohanty
- Riverine and Estuarine Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Debasmita Mohanty
- Riverine and Estuarine Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Pranab Gogoi
- Riverine and Estuarine Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Santhana Kumar V
- Aquatic Environmental Biotechnology and Nanotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Bijay Kumar Behera
- Aquatic Environmental Biotechnology and Nanotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Ranjan Kumar Manna
- Riverine and Estuarine Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
| | - Srikanta Samanta
- Riverine and Estuarine Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700120, India
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Basu S, Chanda A, Gogoi P, Bhattacharyya S. Organochlorine pesticides and heavy metals in the zooplankton, fishes, and shrimps of tropical shallow tidal creeks and the associated human health risk. Mar Pollut Bull 2021; 165:112170. [PMID: 33621901 DOI: 10.1016/j.marpolbul.2021.112170] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
Studies on organochlorine pesticides (OCPs) and heavy metals (HMs) from tidal creeks are scarce. Sixteen OCPs and seven HMs were measured in the surface water, zooplankton, two fishes (Harpadon nehereus and Pampus argenteus), and one shrimp (Penaeus indicus) collected from three tidal creeks of the Indian Sundarban. The surface water was polluted by hexachlorocyclohexane isomers (ΣHCH: 525-1581 ng l-1), dichlorodiphenyltrichloroethane congeners (ΣDDT: 188-377 ng l-1), endosulfan congeners (ΣEND: 687-1474 ng l-1), and other OCPs (512-1334 ng l-1). However, the mean HM concentrations in the surface water were <1 μg l-1. The zooplankton community exhibited bioaccumulation of both OCPs and HMs. Aldrin, Heptachlor, and α-HCH levels in the edible biotas could lead to cancer. Co and Cd levels could lead to non-cancerous risks, and Pb levels could pose a cancerous risk. This study showed that creeks could be potential sites of both OCP and HM pollution.
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Affiliation(s)
- Sanghamitra Basu
- School of Environmental Studies, Jadavpur University, Kolkata, West Bengal 700032, India
| | - Abhra Chanda
- School of Oceanographic Studies, Jadavpur University, Kolkata, West Bengal 700032, India.
| | - Pranab Gogoi
- Central Inland Fisheries Research Institute, CGO Complex, DF Block, Kolkata 700064, West Bengal, India
| | - Subarna Bhattacharyya
- School of Environmental Studies, Jadavpur University, Kolkata, West Bengal 700032, India.
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15
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Gogoi P, Das M, Begum P, Maji TK. Nature of sorption of trivalent arsenic on novel iron oxyhydroxide stabilized starch/OMMT composite: A mechanistic approach. J Water Health 2021; 19:336-350. [PMID: 33901028 DOI: 10.2166/wh.2021.267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Materials which are chemically, energetically and operationally acceptable for arsenic water treatment are highly required. In this study a hybrid material (SICC) of aminated starch, oxyhydroxide of iron and OMMT clay has been demonstrated for arsenic treatment. This new material was highly efficient in arsenic water treatment which could reduce arsenic concentration far below detection limits. All binding interactions during material preparation and arsenic sorption were exclusively characterized with FT-IR, XRD and other spectroscopic tools. A molecular modeling on the basis of density functional theory was carried out to verify the above findings. Influence of material dose, treatment time, initial ion concentration, varying temperatures, etc., on extent of sorption was studied in detail. The thermodynamic parameters viz. ΔG (>-11 kJ/mol), ΔH (42.48 kJ/mol), ΔS (177.6 JK-1 mol-1) and E a (59.16 kJ/mol) determined the feasibility of the process, its endothermic behavior and most importantly the chemical nature of the sorption accompanied by ion-exchange to some extent. The sorption followed a monolayer chemisorption pattern as determined by the Langmuir model (R2 = 0.973, R L = 0.081) with a qmax = 2.04 at 303 K. The binding of As(III) on the material was governed by a pseudo second order kinetic model.
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Affiliation(s)
- P Gogoi
- Department of Chemistry, Sipajhar College, Darrang, Assam 784145, India
| | - M Das
- Department of Chemical Sciences, Tezpur University, Assam 784028, India E-mail:
| | - P Begum
- Department of Chemistry, Gargaon College, Sivasagar, Assam 785686, India
| | - T K Maji
- Department of Chemical Sciences, Tezpur University, Assam 784028, India E-mail:
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16
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Mahato G, Sarma KK, Pathak DC, Barman NN, Gogoi P, Dutta M, Basumatary P. Endotheliotropic herpesvirus infection in Asian elephants ( Elephas maximus) of Assam, India. Vet World 2019; 12:1790-1796. [PMID: 32009758 PMCID: PMC6925033 DOI: 10.14202/vetworld.2019.1790-1796] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/10/2019] [Indexed: 11/22/2022] Open
Abstract
Background and Aim: Elephant endotheliotropic herpesvirus (EEHV) is an emerging disease of elephant. Therefore, a study was conducted to know the actual status of the disease in Assam State of India. Materials and Methods: A total of 289 Asian elephants of Assam were screened during 2 years of study from April 2017 to March 2019. The clinical symptoms of diseased as well as gross and histopathological changes of dead elephants were recorded for the diagnosis of the disease. Virus involved in the occurrence of the disease was confirmed by polymerase chain reaction (PCR). Results: In the present study, a total of three elephant calves out of 22 were found positive to EEHV1A. On the other hand, three adult asymptomatic elephants were also found positive for EEHV1 on screening 267 captive Asian elephants of Assam. The amplified PCR product showed band size of 520, 600, and 930 bp. The PCR amplified product with size 600 bp had shown the gene sequence for EEHV1U77/HEL. Gross lesions include congested blood vessels of the liver and intestinal mucosa, foci of petechiae in the spleen, and heart and focal ulceration in the dorsal surface of the tongue. Microscopically, the kidneys showed intertubular edema and focal areas of degeneration associated with coagulative necrosis of the tubular epithelium. The liver showed hydropic degeneration and fatty changes of the hepatocytes. There was a massive proliferation of fibroblasts in the interlobular spaces which penetrated the necrosed areas of the hepatic lobules. Conclusion: A total of three wild rescued elephant calves and three asymptomatic adults were found positive for EEHV1A during the 2 years of study. The PCR amplified product with size 600 bp had shown the gene sequence for EEHV1U77/HEL.
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Affiliation(s)
- G Mahato
- Department of Veterinary Epidemiology and Preventive Medicine, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - K K Sarma
- Department of Surgery and Radiology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - D C Pathak
- Department of Pathology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - N N Barman
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - P Gogoi
- Junior Research Fellow DBT-Twinning Project NER, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - M Dutta
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - P Basumatary
- Assistant Manager, Centre for Wildlife Rehabilitation and Conservation, Bokakhat, Assam, India
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Das Sarkar S, Naskar M, Gogoi P, Raman RK, Manna RK, Samanta S, Mohanty BP, Das BK. Impact assessment of barge trafficking on phytoplankton abundance and Chl a concentration, in River Ganga, India. PLoS One 2019; 14:e0221451. [PMID: 31483812 PMCID: PMC6726143 DOI: 10.1371/journal.pone.0221451] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 08/07/2019] [Indexed: 12/02/2022] Open
Abstract
Impact of barge movement on phytoplankton abundance and biomass was assessed in the lower stretch of river Ganga, popularly known as Bhagirathi-Hooghly river, during April 2016 to March, 2017. Based on the magnitude of tide, intensity of shipping and boating activities, the stretch from Baranagar to Lalbag (278 km), located at latitude (22°38'33.41"N to 24°10'59.75"N) and longitude (88°21'21.29"E to 88°16'5.65"E) was divided into three zones viz. zone—I (Baranagar to Barrackpore), zone II (Triveni to Balagarh) and zone III (Nabadweep to Lalbag). Water samples were collected randomly from six stations covering 22 barge movements at their passage at three different time intervals viz., 30 minutes before ‘barge movement’, during ‘barge movement’ and 30 minutes after ‘barge movement’. Analysis revealed the presence of 52 phytoplankton taxa belonged to 5 phylum during the study period. The abundance of phytoplankton was highest in zone—I followed by zone III and the zone II. A 44% decrease (1,997 ±1,510 ul-1) in phytoplankton abundance was observed during ‘barge movement’ with respect to normal condition (3,513 ± 2,239 ul-1) which could be due to propeller turbulence in the passage. Cell damage study revealed 21% damage in phytoplankton cell structure in ‘during barge’ followed by ‘after barge’ (10%) condition compared to natural state (6%). Study revealed that phytoplankton biomass (Chlorophyll a) was influenced by ‘barge movement’ in the sampling stretches and the impact was assessed by one way ANOVA. The effect was found significant at Barrackpore (p <0.01), Triveni (p <0.01), Balagarh (p <0.01) and Lalbag (p <0.01) where as it was insignificant at Baranagar and Nabadweep, which may be due to continuous and existing boat trafficking at Baranagar and Nabadweep. Two way ANOVA computed using ‘barge movement’ and sampling stations showed significant (p<0.01) effect on magnitude of Chl a concentrations in the sampling locations. Thus, the ‘barge movement’ influenced phytoplankton abundance and biomass, it had a detrimental effect on phytoplankton cell architecture also. The data set of this work serves as foundation information to understand the ecological implications augmented barge induced environmental disturbances in waterways. This is the first such study which depicts the impact of ‘barge movement’ on aquatic food chain linkages in Bhagirathi- Hooghly river.
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Affiliation(s)
- Soma Das Sarkar
- Fishery Resource and Environment Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
- * E-mail:
| | - Malay Naskar
- Fishery Resource and Environment Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Pranab Gogoi
- Kolkata Centre of ICAR-Central Inland Fisheries Research Institute, Salt Lake, Kolkata, West Bengal, India
| | - Rohan Kumar Raman
- Fishery Resource and Environment Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Ranjan Kumar Manna
- Riverine Ecology and Fisheries Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Srikanta Samanta
- Fishery Resource and Environment Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Bimal Prasanna Mohanty
- Fishery Resource and Environment Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
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18
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Gogoi P, Kamenskyi D, Arslanov DD, Jongma RT, van der Zande WJ, Redlich B, van der Meer AFG, Engelkamp H, Christianen PCM, Maan JC. Magnetoquantum Oscillations at THz Frequencies in InSb. Phys Rev Lett 2017; 119:146603. [PMID: 29053326 DOI: 10.1103/physrevlett.119.146603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Indexed: 06/07/2023]
Abstract
The ac magnetoconductance of bulk InSb at THz frequencies in high magnetic fields, as measured by the transmission of THz radiation, shows a field-induced transmission, which at high temperatures (≈100 K) is well explained with classical magnetoplasma effects (helicon waves). However, at low temperatures (4 K), the transmitted radiation intensity shows magnetoquantum oscillations that represent the Shubnikov-de Haas effect at THz frequencies. At frequencies above 0.9 THz, when the radiation period is shorter than the Drude scattering time, an anomalously high transmission is observed in the magnetic quantum limit that can be interpreted as carrier localization at high frequencies.
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Affiliation(s)
- P Gogoi
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - D Kamenskyi
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - D D Arslanov
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - R T Jongma
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - W J van der Zande
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - B Redlich
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - A F G van der Meer
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - H Engelkamp
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - P C M Christianen
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - J C Maan
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
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Poperezhai S, Gogoi P, Zubenko N, Kutko K, Kutko VI, Kovalev AS, Kamenskyi D. Terahertz lattice dynamics of the potassium rare-earth binary molybdates. J Phys Condens Matter 2017; 29:095402. [PMID: 28114123 DOI: 10.1088/1361-648x/aa55a8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report a systematic study of low-energy lattice vibrations in the layered systems KY(MoO4)2, KDy(MoO4)2, KEr(MoO4)2, and KTm(MoO4)2. A layered crystal structure and low symmetry of the local environment of the rare-earth ion cause the appearance of vibrational and electronic excitations in Terahertz frequencies. The interaction between these excitations leads to sophisticated dynamical properties, including non-linear effects in paramagnetic resonance spectra. The THz study in magnetic field allows for the clear distinction between lattice vibrations and electronic excitations. We measured the THz transmission spectra and show that the low energy lattice vibrations in binary molybdates can be well described within the quasi-one-dimensional model. The developed model describes the measured far-infrared spectra, and results of our calculations agree with previous Raman and ultrasound studies.
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Affiliation(s)
- S Poperezhai
- B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Nauky Ave 47, 61103 Kharkiv, Ukraine
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Mahanta TG, Islam S, Sudke AK, Kumari V, Gogoi P, Rane T, Mahanta BN. Effectiveness of introducing home-based newborn care (HBNC) voucher system in Golaghat District of Assam. Clinical Epidemiology and Global Health 2016. [DOI: 10.1016/j.cegh.2015.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Mahanta TG, Baruah M, Mahanta BN, Gogoi P, Baruah J, Gupte S. Process evaluation of Village Health and Nutrition Day observation (VHND) in a block of Dibrugarh District of Assam. Clinical Epidemiology and Global Health 2015. [DOI: 10.1016/j.cegh.2014.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Affiliation(s)
- P. Gogoi
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - K. Ganar
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - S. Kumar
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
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Dohutia C, Bhattacharyya DR, Sharma SK, Mohapatra PK, Bhattacharjee K, Gogoi K, Gogoi P, Mahanta J, Prakash A. Larvicidal activity of few select indigenous plants of North East India against disease vector mosquitoes (Diptera: Culicidae). Trop Biomed 2015; 32:17-23. [PMID: 25801251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mosquitoes are the vectors of several life threatening diseases like dengue, malaria, Japanese encephalitis and lymphatic filariasis, which are widely present in the north-eastern states of India. Investigations on five local plants of north-east India, selected on the basis of their use by indigenous communities as fish poison, were carried out to study their mosquito larvicidal potential against Anopheles stephensi (malaria vector), Stegomyia aegypti (dengue vector) and Culex quinquefasciatus (lymphatic filariasis vector) mosquitoes. Crude Petroleum ether extracts of the roots of three plants viz. Derris elliptica, Linostoma decandrum and Croton tiglium were found to have remarkable larvicidal activity; D. elliptica extract was the most effective and with LC50 value of 0.307 μg/ml its activity was superior to propoxur, the standard synthetic larvicide. Half-life of larvicidal activity of D. elliptica and L. decandrum extracts ranged from 2-4 days.
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Affiliation(s)
- C Dohutia
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - D R Bhattacharyya
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - S K Sharma
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - P K Mohapatra
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - K Bhattacharjee
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - K Gogoi
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - P Gogoi
- D.R. College, Golaghat-785 621, Assam, India
| | - J Mahanta
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - A Prakash
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
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Raphael V, Gogoi P, Khonglah Y, Lynrah KG, Dass R. Spectrum of renal lesions in systemic lupus erythematosus: Six years' experience at a tertiary health care centre in north east India. Indian J Nephrol 2012; 22:399-400. [PMID: 23326058 PMCID: PMC3544069 DOI: 10.4103/0971-4065.103916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- V. Raphael
- Department of Pathology, North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Mawdiangdiang, Shillong, Meghalaya, India
| | - P. Gogoi
- Department of Pathology, North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Mawdiangdiang, Shillong, Meghalaya, India
| | - Y. Khonglah
- Department of Pathology, North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Mawdiangdiang, Shillong, Meghalaya, India
| | - K. G. Lynrah
- Department of General Medicine, North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Mawdiangdiang, Shillong, Meghalaya, India
| | - R. Dass
- Department of Pediatric Disciplines, North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Mawdiangdiang, Shillong, Meghalaya, India
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Baruah KK, Gogoi B, Gogoi P. Plant physiological and soil characteristics associated with methane and nitrous oxide emission from rice paddy. Physiol Mol Biol Plants 2010; 16:79-91. [PMID: 23572957 PMCID: PMC3550623 DOI: 10.1007/s12298-010-0010-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Methane (CH4) and nitrous oxide (N2O) are important greenhouse gases causing global warming and climate change. Efforts were made to analyze the CH4 and N2O flux in relation to plant and soil factors from rice (Oryza sativa L.) paddy. Ten popularly grown rice varieties namely Rashmisali, Bogajoha, Basmuthi, Lalkalamdani, Choimora (traditional varieties); Mahsuri, Moniram, Kushal, Gitesh and Profulla (high yielding varieties = HYV) were grown during monsoon season of July 2006. The CH4 and N2O emissions were measured the date of transplanting onwards at weekly interval along with soil and plant parameters. The seasonal integrated CH4 and N2O emission (Esif) from rice ranged from 8.13 g m(-2) to 13.00 g m(-2) and 121.63 mg N2O-N m(-2) to 189.46 mg N2O-N m(-2), respectively. Variety Gitesh emitted less N2O and CH4 amongst all the rice varieties. Both CH4 and N2O emission exhibited a significant positive correlation with leaf area, leaf number, tiller number and root dry weight. Soil organic carbon of the experimental field was associated with both CH4 and N2O emission whereas nitrate-N content of soil was associated with N2O emission. Methane emission showed significant positive correlations with soil temperature and crop photosynthetic rate. Traditional rice varieties with profuse vegetative growth recorded higher CH4 and N2O fluxes compared to HYVs. Gitesh and Kushal having low seasonal CH4 and N2O emission with higher yield potential can be recommended as low greenhouse gas emitting rice varieties.
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Affiliation(s)
- K. K. Baruah
- Department of Environmental Science, Tezpur University, Tezpur, 784 028 Assam India
| | - Boby Gogoi
- Department of Environmental Science, Tezpur University, Tezpur, 784 028 Assam India
| | - P. Gogoi
- Department of Environmental Science, Tezpur University, Tezpur, 784 028 Assam India
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Prakash A, Bhattacharyya DR, Mohapatra PK, Gogoi P, Sarma DK, Bhattacharjee K, Mahanta J. Evaluation of PermaNet 2.0 mosquito bednets against mosquitoes, including Anopheles minimus s.l., in India. Southeast Asian J Trop Med Public Health 2009; 40:449-457. [PMID: 19842429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Wash resistance and field bioefficacy of PermaNet 2.0 nets, long lasting insecticidal nets, against mosquitoes were evaluated in Assam, northeastern India. After repeated hand washings at 12-day intervals a decline in the mosquito killing ability of PermaNet nets was noted (trend chi2 38.9, p < 0.0001), yet these nets retained good insecticidal efficacy for up to 15 wash cycles, producing a 72.5% mean mortality of An. minimus 24 hours after a 3-minute exposure in World Health Organization cones after 15 washings. Significantly fewer (p < 0.001) mosquitoes were captured in self-baited landing collections in houses equipped with PermaNet nets than in houses using untreated nets in the case of culicines (p < 0.001) but not with anophelines, including An. minimus. The use of PermaNet nets resulted in noticeably fewer bites from Culex pseudovishnui (68.5%) and Cx. quinquefasciatus (70%). Blood-feeding inhibition of mosquitoes in deliberately torn PermaNet nets was seen, indicating a protective effect for those sleeping under these nets. No serious adverse effects of the PermaNet nets were reported by users.
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Affiliation(s)
- Anil Prakash
- Regional Medical Research Center, NE (Indian Council of Medical Research), Dibrugarh, Assam, India
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Barua P, Adhikary R, Kalita P, Bordoloi D, Gogoi P, Singh R, Ghosh A. Wild edible mushrooms of meghalaya. Anc Sci Life 1998; 17:190-3. [PMID: 22556840 PMCID: PMC3331107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/1995] [Accepted: 01/04/1997] [Indexed: 11/17/2022] Open
Abstract
Different flesh mushrooms grow widely in Meghalaya. Altogether fie edible species were collected and identified which were found abundantly in forest and are known to be consumed by local people for time immemorial, The species identified are lentinus edodes (Berk) Sing., Boletus edulis Bull ex Fr., Clavaria cinerea (Fr.) Schroet, Clavaria aurea (F) Quet and cantharellus floccosus Juss.
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Affiliation(s)
- Paran Barua
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - R.K Adhikary
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - Pabitra Kalita
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - Dalimi Bordoloi
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - P. Gogoi
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - R.S. Singh
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
| | - A.C. Ghosh
- Division of Plant sciences & Ecology, Regional research Laboratory, Jorhat – 785 006, Assam, India
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