Wetland Research and Training Center

Chilika, India

Wetland Research and Training Center

Chilika, India
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Mohanty B.,Wetland Research and Training Center | Muduli P.R.,Wetland Research and Training Center | Cooper G.,University of Southampton | Barik S.K.,Wetland Research and Training Center | And 3 more authors.
Bulletin of Environmental Contamination and Toxicology | Year: 2017

The spatio-temporal distribution and the controlling factors of petroleum hydrocarbons (PHCs) in sediments of Chilika lagoon was investigated. Samples were collected during three seasons and quantified using UV-fluorescence spectroscopy. Concentrations of PHCs in surface sediments varies from 0.18 to 12.13 ppm (mean 3.71 ± 3.94 ppm). Compared to the lagoon, the monitoring stations adjacent to jetties with high boating activities tend to have higher PHC concentrations, suggesting that the contribution is likely to be from fossil fuel combustion and accidental seepage. The sediment organic matter (OM) of Chilika ranges from 0.26% to 6.23%. PHC maintains a positive correlation with OM (p < 0.05; f = 0.334), indicating the long term deposition of PHC as sediment OM. However, there is no significant relation between PHC and sediment texture, indicating its negligible control over PHC. The recorded PHC concentrations are below the threshold limit (70 ppm) as classified by United States (US) National Academy of Sciences (NAS) and also lower than those reported from similar ecosystems in India and overseas. Since the long term deposition and the bioaccumulation of PHC cannot be avoided, it is essential to monitor these parameters periodically. © 2017 Springer Science+Business Media New York


Gupta A.K.,Molecular Biology Unit | Gupta A.K.,North West University | Rastogi G.,University of California at Davis | Rastogi G.,Wetland Research and Training Center | And 5 more authors.
Medical and Veterinary Entomology | Year: 2014

Flesh flies of the genus Sarcophaga (Diptera: Sarcophagidae) are carrion-breeding, necrophagous insects important in medical and veterinary entomology as potential transmitters of pathogens to humans and animals. Our aim was to analyse the diversity of gut-associated bacteria in wild-caught larvae and adult flesh flies using culture-dependent and culture-independent methods. Analysis of 16S rRNA gene sequences from cultured isolates and clone libraries revealed bacteria affiliated to Proteobacteria, Actinobacteria, Firmicutes and Bacteroidetes in the guts of larval and adult flesh flies. Bacteria cultured from larval and adult flesh fly guts belonged to the genera Acinetobacter, Bacillus, Budvicia, Citrobacter, Dermacoccus, Enterococcus, Ignatzschineria, Lysinibacillus, Myroides, Pasteurella, Proteus, Providencia and Staphylococcus. Phylogenetic analysis showed clone sequences of the genera Aeromonas, Bacillus, Bradyrhizobium, Citrobacter, Clostridium, Corynebacterium, Ignatzschineria, Klebsiella, Pantoea, Propionibacterium, Proteus, Providencia, Serratia, Sporosarcina, Weissella and Wohlfahrtiimonas. Species of clinically significant genera such as Ignatzschineria and Wohlfahrtiimonas spp. were detected in both larvae and adult flesh flies. Sequence analysis of 16S rRNA gene libraries supported culture-based results and revealed the presence of additional bacterial taxa. This study determined the diversity of gut microbiota in flesh flies, which will bolster the ability to assess microbiological risk associated with the presence of these flies. The present data thereby establish a platform for a much larger study. © 2014 The Royal Entomological Society.


Naik S.,Berhampur University | Mishra R.K.,National Institute of Oceanography of India | Mahapatro D.,Wetland Research and Training Center | Panigrahy R.C.,Berhampur University
Journal of Environmental Biology | Year: 2014

Distribution of phytoplankton, productivity and chlorophyll-a concentration in relation to physico-chemical parameters viz. water temperature, pH, total suspended solid, turbidity, dissolved oxygen, biochemical oxygen demand, salinity and nutrients (NO2-N, NO3-N, PO4-P and SiO4-Si) were studied for pre-monsoon, monsoon and post-monsoon during the year 2005. The major groups of phytoplankton species were diatoms followed by dinoflagellates and other algae. A total of 43 species of phytoplankton comprising 32 diatoms, 6 dinoflagellates and 5 other algae were recorded during the entire study period. The species Nitzschia, Chaetoceros and Coscinodiscus were identified as dominant diatoms group. Higher values of phytoplankton (28612 nos I-1) with high rate of photosynthesis were observed during post-monsoon season, which was responsible for increasing DO (8.72 mg I-1) and pH(8.24) of the water column. R-mode factor analysis revealed that there were two factors or PCs that explained 93.0%, 95.2% and 94.4% of the total variance for pre-monsoon, monsoon and post-monsoon respectively. Generally, the trend distribution of phytoplankton closely followed the distribution of salinity, pH and DO of estuarine water. © 2014 Triveni Enterprises, Lucknow (India).


Ray L.,KIIT University | Mishra S.R.,KIIT University | Panda A.N.,KIIT University | Das S.,National Institute of Technology Rourkela | And 5 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2016

A novel actinobacterial strain RC1832T was isolated from the sediment of a fish dumping yard at Balugaon near Chilika Lake. The strain is halotolerant (15% NaCl, w/v), alkali-tolerant (pH 7-10) and hydrolyzes chitin, starch, gelatin, cellulose, carboxymethyl cellulose, Tween 80, tributyrin, lecithin and casein. Apart from showing typical genus-specific morphological and chemotaxonomic features, the comparision and analysis of the near complete 16S rRNA gene sequence clearly revealed that the strain RC1832T represented a member of the genus Streptomyces. It exhibited the highest sequence similarities with the strains Streptomyces fenghuangensis GIMN4.003T (99.78 %), Streptomyces nanhaiensis DSM 41926T (99.07 %), Streptomyces radiopugnans R97T(98.71 %), Streptomyces atacamensis DSM 42065T (98.65 %) and Streptomyces barkulensis DSM 42082T (98.25 %). The DNA-DNA relatedness of strain RC 1832T with the closest phylogenetic neighbours S. fenghuangensis GIMN4.003T and S. nanhaiensis DSM 41926T were 20±2% and 21±2 %, respectively. Thus, based on a range of phenotypic and genotypic properties, strain RC1832T was suggested to represent a novel species of the genus Streptomyces for which the name Streptomyces chitinivorans sp. nov. is proposed. The type strain is RC1832T (=JCM 30611=KCTC 29696). © 2016 IUMS.


Kim J.Y.,Pusan National University | Bhatta K.,Wetland Research and Training Center | Rastogi G.,Wetland Research and Training Center | Muduli P.R.,Wetland Research and Training Center | And 4 more authors.
Ecological Engineering | Year: 2016

Lagoon ecosystems have been severely degraded by anthropogenic activities, which result in ecological and hydrological changes in the system. Detailed understanding of the recovery processes of restored lagoon systems has been impeded by the underlying complexity of integral environmental components. The aim of this study was to understand relationships between water quality variables in a restored lagoon, and temporal and spatial changes at each recovery stage after lagoon restoration. Ten water quality parameters were monitored on a monthly basis at 30 sampling sites in the Chilika Lagoon from 1999 to 2009. Self-Organizing Map and principal component analyses showed that salinity was the dominant factor for the Chilika Lagoon and had maximal component loading in the principal component analysis. Mean salinity level increased after opening of a new mouth in the study site, however, a decreasing trend was observed 4 years after the restoration. The pH and pCO2 exhibited pulse-type resilience after the restoration event. The average nitrate:phosphate ratio increased steadily during the monitoring period. Multivariate analysis of monitoring data of the restoration site provided a deep understanding of its temporal and spatial change. It would be worthwhile to extend multivariate analysis to diverse ecosystems, while considering biological components is recommended in order to evaluate the comprehensive response of the restored system. © 2016 Elsevier B.V.


Srichandan S.,Wetland Research and Training Center | Kim J.Y.,Pusan National University | Kumar A.,University of Georgia | Mishra D.R.,University of Georgia | And 4 more authors.
Marine Pollution Bulletin | Year: 2015

One of the main challenges in phytoplankton ecology is to understand their variability at different spatiotemporal scales. We investigated the interannual and cyclone-derived variability in phytoplankton communities of Chilika, the largest tropical coastal lagoon in Asia and the underlying mechanisms in relation to environmental forcing. Between July 2012 and June 2013, Cyanophyta were most prolific in freshwater northern region of the lagoon. A category-5 very severe cyclonic storm (VSCS) Phailin struck the lagoon on 12th October 2013 and introduced additional variability into the hydrology and phytoplankton communities. Freshwater Cyanophyta further expanded their territory and occupied the northern as well as central region of the lagoon. Satellite remote sensing imagery revealed that the phytoplankton biomass did not change much due to high turbidity prevailing in the lagoon after Phailin. Modeling analysis of species-salinity relationship identified specific responses of phytoplankton taxa to the different salinity regime of lagoon. © 2015 Elsevier Ltd.


Ansari K.G.M.T.,Indian Institute of Science | Pattnaik A.K.,Wetland Research and Training Center | Rastogi G.,Wetland Research and Training Center | Bhadury P.,Indian Institute of Science
Wetlands Ecology and Management | Year: 2015

The present study revealed an inventory of free-living marine nematode species from the Asia’s largest coastal lagoon, Chilika (lat. 19°28′ and 19°54′N; long. 085°05′ and 085°38′E), located in the East Coast of India and facing the Bay of Bengal. This study provided a checklist of 64 free-living marine nematode species belonging to 32 genera and 13 families. Among these, marine nematode species Oncholaimus oxyuris has been reported as new distributional record from Indian waters. The distribution of encountered nematode species was investigated in relation with environmental variables such as salinity and sediment texture throughout the lagoon. Most of the nematode species were found in stations which had high salinity (>6) and nature of sediments varied from sandy to silt/clay. However, few nematode families (e.g. Oncholaimidae and Microlaimidae) were also observed in low salinity stations of the lagoon indicating tolerance to variation in salinity. © 2015, Springer Science+Business Media Dordrecht.


Srichandan S.,Wetland Research and Training Center | Kim J.Y.,Pusan National University | Bhadury P.,Indian Institute of Science | Barik S.K.,Wetland Research and Training Center | And 4 more authors.
Environmental Monitoring and Assessment | Year: 2015

The Asia’s largest lagoon, Chilika, is a shallow water estuary and a designated “Ramsar” site located in the east coast of India. The spatiotemporal diversity of phytoplankton based on the monthly sampling between July 2011 and June 2012 was investigated in relation to physicochemical variables of the surface water column from 13 stations. The salinity was minimum (average 9) during the monsoon which was primarily due to riverine discharge. As the season progressed towards post-monsoon, average salinity of the whole lagoon reached to 10 which further increased to 20 during pre-monsoon season. A total of 259 species of phytoplankton, mostly dominated by the Bacillariophyta (138 species) followed by Dinophyta (38 species), Chlorophyta (32 species), Cyanophyta (29 species), Euglenophyta (18 species), and Chrysophyta (4 species), were recorded in this study. Different ecological sectors of the lagoon (except the northern sector) were dominated by diatoms, while the northern sector due to its freshwater regime supported large population of euglenoids. Based on the multivariate ordination analysis, salinity regime and light availability played important role in determining the distribution, diversity, and composition of phytoplankton communities. Overall, this study documented a very high diversity of phytoplankton and highlighted the importance of taking extensive sampling in getting a clearer understanding of phytoplankton community structure in less-studied environments such as Chilika lagoon. © 2015, Springer International Publishing Switzerland.


PubMed | Wetland Research and Training Center, Jet Propulsion Laboratory and KIIT University
Type: | Journal: Genomics data | Year: 2016

Till date, only one draft genome has been reported within the genus Mangrovibacter. Here, we report the second draft genome shotgun sequence of a Mangrovibacter sp. strain MP23 that was isolated from the roots of Phargmites karka (P. karka), an invasive weed growing in the Chilika Lagoon, Odisha, India. Strain MP23 is a facultative anaerobic, nitrogen-fixing endophytic bacteria that grows optimally at 37C, 7.0 pH, and 1% NaCl concentration. The draft genome sequence of strain MP23 contains 4,947,475bp with an estimated G+C content of 49.9% and total 4392 protein coding genes. The genome sequence has provided information on putative genes that code for proteins involved in oxidative stress, uptake of nutrients, and nitrogen fixation that might offer niche specific ecological fitness and explain the invasive success of P. karka in Chilika Lagoon. The draft genome sequence and annotation have been deposited at DDBJ/EMBL/GenBank under the accession number LYRP00000000.


PubMed | Wetland Research and Training Center, University of Georgia, Pusan National University and Indian Institute of Science
Type: Journal Article | Journal: Marine pollution bulletin | Year: 2015

One of the main challenges in phytoplankton ecology is to understand their variability at different spatiotemporal scales. We investigated the interannual and cyclone-derived variability in phytoplankton communities of Chilika, the largest tropical coastal lagoon in Asia and the underlying mechanisms in relation to environmental forcing. Between July 2012 and June 2013, Cyanophyta were most prolific in freshwater northern region of the lagoon. A category-5 very severe cyclonic storm (VSCS) Phailin struck the lagoon on 12th October 2013 and introduced additional variability into the hydrology and phytoplankton communities. Freshwater Cyanophyta further expanded their territory and occupied the northern as well as central region of the lagoon. Satellite remote sensing imagery revealed that the phytoplankton biomass did not change much due to high turbidity prevailing in the lagoon after Phailin. Modeling analysis of species-salinity relationship identified specific responses of phytoplankton taxa to the different salinity regime of lagoon.

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