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  • Title: Trichodesmium blooms and warm-core ocean surface features in the Arabian Sea and the Bay of Bengal.
    Author: Jyothibabu R, Karnan C, Jagadeesan L, Arunpandi N, Pandiarajan RS, Muraleedharan KR, Balachandran KK.
    Journal: Mar Pollut Bull; 2017 Aug 15; 121(1-2):201-215. PubMed ID: 28602311.
    Abstract:
    Trichodesmium is a bloom-forming, diazotrophic, non-heterocystous cyanobacteria widely distributed in the warmer oceans, and their bloom is considered a 'biological indication' of stratification and nitrogen limitation in the ocean surface layer. In the first part of this paper, based on the retrospective analyses of the ocean surface mesoscale features associated with 59 Trichodesmium bloom incidences recorded in the past, 32 from the Arabian Sea and the Bay of Bengal, and 27 from the rest of the world, we have showed that warm-core features have an inducing effect on bloom formation. In the second part, we have considered the environmental preferences of Trichodesmium bloom based on laboratory and field studies across the globe, and proposed a view about how warm-core features could provide an inducing pre-requisite condition for the bloom formation in the Arabian Sea and the Bay of Bengal. Proposed that the subsurface waters of warm-core features maintain more likely chances for the conducive nutrient and light conditions required for the triggering of the blooms.
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