Browsing Scholarly literature by Author "Nair, S."
Now showing items 1-20 of 95
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16S rRNA-based bacterial diversity in the organic-rich sediments underlying oxygen-deficient waters of the eastern Arabian Sea
Divya, B.; Parvathi, A.; LokaBharathi, P.A.; Nair, S. (Springer, 2011)The eastern Arabian Sea has a unique and permanent oxygen minimum zone (OMZ) that extends along the western continental margin of India. The sediment below this region is rich in organic matter. This study describes the ... -
16SrRNA and enzymatic diversity of culturable bacteria from the sediments of oxygen minimum zone in the Arabian Sea
Divya, B.; Soumya, K.V.; Nair, S. (Springer, 2010)Sediment underlying the oxygen minimum zone of the eastern Arabian Sea is rich in organic matter. Bacteria in this sediment-water interface are of great ecological importance as they are responsible for decomposing, ... -
A deep-sea bacterium with unique nitrifying property
Ram, A.; LokaBharathi, P.A.; Nair, S.; Chandramohan, D. (Indian Academy of Sciences, 2001)Sediment cores collected from the Central Indian Basin (10°1¢–10°2¢S, 75°59¢–76°2¢E) harboured a high population of nitrifying bacteria which ranged from 103 to 107 cfu per gram dry weight. This high density could contribute ... -
A preliminary study of anaerobic thiosulfate-oxidising bacteria as denitrifiers in the Arabian Sea
LokaBharathi, P.A.; Chandramohan, D.; Nair, S. (Taylor & Francis, 1988)Bacteria which oxidize thiosulfate and reduce nitrate (TONRB) and bacteria which oxidize thiosulfate and denitrify (TODB) sampled at 5-, 100-, 200-and 300-m depths were enumerated in agar shake cultures by colony counting ... -
Aberrations in the microbiome of cyanobacteria from a tropical estuary polluted by heavy metals
Jasmin, C.; Anas, A.; Singh, D.; Purohit, H.J.; Gireeshkumar, T.R.; Nair, S. (Elsevier Ltd, 2020)The effect of heavy metal pollution on the microbiome of cyanobacteria in Cochin estuary (CE) on the southwest coast of India is reported in the study. Statistically significant difference in heavy metal concentration was ... -
Abundance and production of particle-associated bacteria and their role in a mangrove-dominated estuary
DeSouza, M.J.B.D.; Nair, S.; LokaBharathi, P.A.; Chandramohan, D. (Inter-Research, 2009)A 1 yr study was carried out in the mangrove-dominated, tropical Mandovi estuary (Goa, India) to assess the contribution of particle-associated bacteria (PAB) to the system’s variability in terms of abundance and productivity. ... -
Abundance, viability and culturability of Antarctic bacteria
LokaBharathi, P.A.; DeSouza, M.J.B.D.; Nair, S.; Chandramohan, D. (Department of Ocean Development, New Delhi, India, 1999)The viability of total number of bacteria decide the mineralisation rate in any ecosystem and ultimately the fertility of the region. This study aims at establishing the extent of viability in the standing stock of the ... -
An appraisal of biological responses and network of environmental interactions in non-mining and mining impacted coastal waters
Fernandes, C.E.G.; Malik, A.; Jineesh, V.K.; Fernandes, S.O.; Das, A.; Pandey, S.S.; Kanolkar, G.; Sujith, P.P.; Velip, D.; Shaikh, S.; Helekar, S.; Gonsalves, M.J.B.D.; Nair, S.; LokaBharathi, P.A. (Springer, 2015)The coastal waters of Goa and Ratnagiri lying on the West coast of India are influenced by terrestrial influx. However, Goa is influenced anthropogenically by iron-ore mining, while Ratnagiri is influenced by deposition ... -
Anaerobic sulfide-oxidation in marine colorless sulfur-oxidizing bacteria
LokaBharathi, P.A.; Nair, S.; Chandramohan, D. (Springer, 1997)Colorless sulfur-oxidizing bacteria are ubiquitous in Indian waters and have the ability to oxidize sulfide under anaerobic conditions. These bacteria can not only mediate the sulfur cycle oxidatively but also the nitrogen ... -
Anoxia over the western continental shelf of India: Bacterial indications of intrinsic nitrification feeding denitrification
Krishnan, K.P.; Fernandes, S.O.; LokaBharathi, P.A.; KrishnaKumari, L.; Nair, S.; Pratihary, A.K.; Rao, B.R. (Elsevier, 2008)Studies on the Arabian Sea coastal anoxia have been of immense interest, but despite its ecological significance there is sparse understanding of the microbes involved. Hence, observations were carried out off Goa (15 ... -
Antagonistic interactions of sponge-associated Actinobacteria against heterotrophic bacteria from sponge and ambient water
Subina, N.S.; Sonam, C.S.; Nair, S.; Gonsalves, M.J.B.D. (Current Science Association, IAS, 2017)In the present study, 11 sponge-associated Actinobac-teria showed 316 inhibitory interactions against 75 heterotrophic bacteria as each Actinobacteria inhibit-ed the growth of >1 bacterial isolates from the sponge and ... -
Anti-bacterial compounds from the sponge Haliclona sp.
Parameswaran, P.S.; Kamat, S.Y.; Chandramohan, D.; Nair, S.; Das, B. (New Delhi: Oxford & IBH, 1992)The crude methanolic extract of the sponge Haliclona sp., collected off Gujarat coast exhibited promising anti-viral (in vitro, 75%) and anti-bacterial properties Partitioning of the extract between various organic solvents, ... -
Assessment of viability in the bacterial standing stock of the Antarctic Sea from the Indian side
LokaBharathi, P.A.; Nair, S.; DeSouza, M.J.B.D.; Chandramohan, D. (Ifremer/ CNRS/ IRD/ Editions scientifiques et medicales Elsevier SAS. Tous droits reserves, 2001)During the austral summer, the bacterial population along the cruise track extending from 70 degrees S and 18 degrees E to 30 degrees S and 35 degrees E are examined. During the cruise, three distinct fractions of the ... -
Bacterial Associations: Antagonism to Symbiosis
Nair, S. (National Institute of Oceanography, Goa, 2004) -
Bacterial diversity associated with Cinachyra cavernosa and Haliclona pigmentifera, cohabiting sponges in the coral reef ecosystem of Gulf of Mannar, southeast coast of India
Jasmin, C.; Anas, A.; Nair, S. (PLOS One, 2015)Sponges are abundant, diverse and functionally important organisms of coral reef ecosystems. Sponge-associated microorganisms have been receiving greater attention because of their significant contribution to sponge biomass, ... -
Bacterial domination over Archaea in ammonia oxidation in a monsoon-driven tropical estuary
Vipindas, P.V.; Anas, A.; Jasmin, C.; Lallu, K.R.; Fausia, K.H.; Balachandran, K.K.; Muraleedharan, K.R.; Nair, S. (Springer, 2015)Autotrophic ammonia oxidizing microorganisms,which are responsible for the rate-limiting step of nitrification in most aquatic systems, have not been studied in tropical estuaries. Cochin estuary (CE) is one of the largest, ... -
Bacterial flora of Dona Paula, India using numerical profiles
LokaBharathi, P.A.; Nair, S.; Chandramohan, D. (Japanese Society of Fisheries Science, 1990) -
Bacterial flora of healthy and abnormal chaetognaths
Nair, S.; Kita-Tsukamoto, K.; Simidu, U. (Japanese Society of Fisheries Science, 1988) -
Bacterial growth efficiency in a tropical estuary: Seasonal variability subsidized by allochthonous carbon
Ram, A.S.P.; Nair, S.; Chandramohan, D. (Springer, 2007)Bacterial growth efficiency (BGE) is a key factor in understanding bacterial influence on carbon flow in aquatic ecosystems. Intra-annual variability in BGE, and bacteria-mediated carbon flow in the tropical Mandovi and ... -
Bacterial growth efficiency in the tropical estuarine and coastal waters of Goa, southwest coast of India
Ram, A.; Nair, S.; Chandramohan, D. (Springer, 2003)Bacterial growth efficiency (BGE) is an index of organic carbon passing through bacteria in an aquatic system. BGE values of natural bacterioplankton assemblages were measured in tropical estuarine and adjacent coastal ...