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Roy, Rajdeep
- Revisiting the Noctiluca scintillans Paradox in Northern Arabian Sea
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Authors
Affiliations
1 ESSO-Indian National Centre for Ocean Information Services, Pragathi Nagar, Nizampet, Hyderabad 500 090, IN
2 Ocean Sciences Group, Earth and Climate Science Area, National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
1 ESSO-Indian National Centre for Ocean Information Services, Pragathi Nagar, Nizampet, Hyderabad 500 090, IN
2 Ocean Sciences Group, Earth and Climate Science Area, National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
Source
Current Science, Vol 113, No 07 (2017), Pagination: 1429-1434Abstract
In 2015, a Noctiluca scintillans bloom and associated water column properties were studied in the northern Arabian Sea. Our observations showed photic depth limited to 30 m with uniform oxygen concentration of ~223 μM. In general, the dissolved oxygen ranged between 180 and 223 μM within the top 80 m indicating saturated mixed layer. Chlorophyll a varied between 0.24 and 2.4 mg m–3 within the core of the bloom and <0.1mg m–3 outside. We further examined Argo oxygen data from 2006 to 2013 to delineate possible surface water hypoxia associated with the initiation of N. scintillans bloom. Oxygen profiles from Argo data suggest oxic upper water column (~ 50 m) with strong seasonal shoaling. Our results do not indicate any mixed layer oxygen depletion associated with the N. scintillans bloom or any evidence of surface water hypoxia in the past. However, examination of silicate/nitrate (Si/N) climatology suggests strong longitudinal variation. The silicate in the surface waters in the northwestern Arabian Sea is depleted much earlier (Si/N < 1) compared with the eastern part, resulting in a strong spatial trend. This presumably facilitates easy community transition to a N. scintillans bloom. This is supported by the heterotrophic nature of the species which, under detectable and below-detectable nitrate conditions, gives it a competitive advantage over other phytoplankton communities.Keywords
Hypoxia, Monsoon, Noctiluca scintillans, Oxygen, Silicate/Nitrate Ratio.Full Text
References
- do Rosario Gomes, H., Goes, J. I., Matondkar, S. G., Buskey, E. J., Basu, S., Parab, S. and Thoppil, P., Massive outbreaks of Noctiluca Scintillans scintillans blooms in the Arabian Sea due to spread of hypoxia. Nature Commun., 2014, 5, 1–8.
- Kraberg, A., Baumann, M. and Dürselen, C. D., Coastal phyto-plankton: photo guide for Northern European seas. Pfeil, Munchen, 2010.
- Honer, R. A., A Taxonomic Guide to some Common Marine Phytoplankton, Biopress, Bristol, UK, 2002.
- Chaghtai, F. U. and Saifullah, S. M., On the occurrence of green Noctiluca Scintillans scintillans blooms in coastal waters of Pakistan, North Arabian Sea. Pak. J. Bot., 2006, 38, 893.
- Harrison, P. J. et al., Geographical distribution of red and green Noctiluca scintillans scintillans. Chin. J. Oceanol. Limnol., 2011, 29, 807–831.
- D’Silva, M. S., Anil, A. C., Naik, R. K. and D’Costa, P. M., Algal blooms: a perspective from the coasts of India. Nat. Hazards, 2012, 63, 1225–1253.
- Nayar, S., Gupta, T. R. and Prabhu, H. V., Bloom of Noctiluca Scintillans scintillans Ma Cartney in the Arabian Sea Off Mangalore, Southwest India. Asian Fish. Sci. J., 2001, 14, 77–82.
- Prakash, S., Ramesh, R., Sheshshayee, M. S., Dwivedi, R. M. and Raman, M., Quantification of new production during a winter Noctiluca Scintillans scintillans bloom in the Arabian Sea. Geophys. Res. Lett., 2008, 35, L08604.
- Do Rosario Gomes, H., Goes, J. I., Matondkar, S. P., Parab, S. G., Al-Azri, A. R. and Thoppil, P. G., Blooms of Noctiluca scintillans miliaris in the Arabian Sea – an in situ and satellite study. Deep Sea. Res. Part I, 2008, 55, 751–765.
- Rosario Gomes, H., Matondkar, S. G., Parab, S. G., Goes, J. I., Pednekar, S., Al‐Azri, A. and Thoppil, P. G., Unusual blooms of green Noctiluca scintillans miliaris (Dinophyceae) in the Arabian Sea during the winter monsoon. AGU Monograph: Indian Ocean Biogeochemical Process and Ecological Variability, 2009, 347–363; Geophysical Monograph Series 185; doi:10.1029/2008GM000831.
- Madhupratap, M., Kumar, S. P., Bhattathiri, P. M., Kumar, M. D., Raghukumar, S., Nair, K. K. and Ramaiah, N., Mechanism of the biological response to winter cooling in the northeastern Arabian Sea. Nature, 1996, 384, 549–552.
- Smith, S, L., Understanding the Arabian Sea: reflections on the 1994–1996 Arabian Sea expedition. Deep. Sea. Res Part II, 2001, 48, 1385–1402.
- Bange, H. W. et al., A revised nitrogen budget for the Arabian Sea. Global Biogeochem. Cycles, 2000, 14, 1283–1297.
- Sawant, S. S. and Madhupratap, M., seasonality and composition of phytoplankton in the Arabian Sea. Curr. Sci., 1996, 71, 869–873.
- Latasa, M. and Bidigare, R. R., A comparison of phytoplankton populations of the Arabian Sea during the spring intermonsoon and southwest monsoon of 1995 as described by HPLC-analysed pigments. Deep Sea. Res Part II, 1998, 45, 2133–2170.
- Miyaghuchi, H., Fujiki, T., Kikuchi, T., Kuwahara, V. S. and Toda, T., Relationship between the bloom of Noctiluca scintillans and environmental factors in the coastal waters of Sagami Bay, Japan. J. Plankton Res., 2006, 28(3), 313–324.
- Roy, R., Chitari, R., Kulkarni, V., Krishna, M. S., Sarma, V. V. S. S. and Anil, A. C., CHEMTAX-derived phytoplankton community structure associated with temperature fronts in the northeastern Arabian Sea. J. Mar. Syst., 2015, 144, 81–91.
- Roy, R. and Anil, A. C., Complex interplay of physical forcing and Prochlorococcus population in ocean. Prog. Oceanogr., 2015, 137, 250–260.
- Strickland, J. D. and Parsons, T. R., A Practical Handbook of Seawater Analysis, Bulletin/Fisheries Research Board of Canada, Ottawa, 1972, p. 167.
- Garcia, H. E. et al., Dissolved inorganic nutrients (phosphate, nitrate, silicate). In World Ocean Atlas, USA, 2013, vol. 4, p. 25.
- Basu, S., Deobagkar, D. D., Prabhu Matondakar, S. G. and Furtado, I., Culturable bacterial flora associated with the dinoflagellate green Noctilu camiliaris during active and declining bloom phases in the northern Arabian Sea. Microbial. Ecol., 2013, 65(4), 934-954.
- Naqvi, S. W. A. et al., The Arabian Sea as a high-nutrient, lowchlorophyll region during the late southwest monsoon. Biogeo-sciences, 2010, 7, 2091–2100.
- Naqvi, S. W., Bange, H. W., Farıas, L., Monteiro, P. M., Scranton, M. I. and Zhang, J., Marine hypoxia/anoxia as a source of CH4 and N2O. Biogeosciences, 2010, 7, 2159–2190.
- Miller, C. B. and Wheeler, P. A., Biological Oceanography, John Wiley, 11 April 2012.
- Shankar, D., Remya, R., Vinayachandran, P. N., Chatterjee, A. and Behera, A., Inhibition of mixed-layer deepening during winter in the northeastern Arabian Sea by the West India Coastal Current. Climate Dyn., 2015, 47, 1049–1072.