Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8884042 | Continental Shelf Research | 2018 | 25 Pages |
Abstract
The seasonal variation in phytoplankton composition as well as the influencing factors on phytoplankton community were examined for the coastal waters of Kochi, southeastern Arabian Sea during 2015. The elevated flux of total nitrogen (TN) and silica (Si) during the summer monsoon (SM) induced the harmful algal blooms (HABs) of Scrippsiella trochoidea (11.9â¯Ã 105 cellsâ¯Lâ1) and Karenia mikimotoi (6â¯Ã 105 cellsâ¯Lâ1) near the inlets of Kochi estuary. Blooms of S. trochoidea were recorded for the first time in the Indian waters. The satellite data of chlorophyll-a showed the significant correlation with insitu observations of phytoplankton abundance and provided a better understanding of the spatio-temporal distribution. The canonical correspondence analysis indicates that the increased TN and Si fluxes and lower temperature induced the HABs during the SM. The reduction in the load of N and Si in the coastal waters of southeastern Arabian Sea is essential for controlling the HABs.
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Authors
P. Sathish Kumar, M. Kumaraswami, G. Durga Rao, P. Ezhilarasan, R. Sivasankar, V. Ranga Rao, K. Ramu,