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RISS 인기검색어
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- 저자 : Lotliker Aneesh Anandrao (검색결과 1 건)
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Sarma Nittala S.,Baliarsingh Sanjiba Kumar,Lotliker Aneesh Anandrao,Pandi Sudarsana Rao,Samanta Alakes,Srichandan Suchismita 한국해양과학기술원 2023 Ocean science journal Vol.58 No.1
Green Noctiluca scintillans (NSG) is a mixotrophic dinofagellate that frequently forms intense blooms in the north Indian Ocean, especially in the northeastern Arabian Sea during winter. This study investigates the conducive conditions and drivers associated with NSG blooms and proposes signifcant models for estimating NSG based on in situ (time-series) study during the bloom cycles. Two critical factors with regard to the blooms, i.e., phytoplankton abundance and sea surface temperature (SST), were examined. The frst phase of heterotrophy dominance was when moderate blooms up to~ 2.26× 104 cells 1–1 occurred and, when NSG cells per unit chlorophyll-a (chl-a) increased, SST decreased up to~24.5 ºC. The bloom intensity was proportional to the feed (diatoms/phytoplankton) availability and the degree of cooling (by the winter convection, i.e., nutrient enrichment). In the second phase of autotrophy dominance, intense blooms up to 1.9× 105 cells l −1 occurred and NSG cells per unit chl-a fell, when the SST increased. During this period, bloom intensity was proportional to the degree of warming, i.e., nutrient and physiological stress. Phytoplankton are related to NSG by a single linear model through this SST cycle and is likely the NSG’s essential biotic precursor. Attention is then focused on developing a remote sensing refectance (Rrs) model for efcient synoptic monitoring of NSG using ocean color satellites. The Rrs band product ratio, a new metric, in combination with SST, notably modelled NSG abundance, which may be of potential routine application.
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