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An optical remote sensing approach for ecological monitoring of red and green Noctiluca scintillans.

Abstract：

:An ecosystem disruptive bloom of red Noctiluca scintillans (hereafter Noctiluca) was observed in coastal waters of the north-western Bay of Bengal during April 2014. Based on the principle of phytoplankton group/species specific remote sensing reflectance (Rrs), a technique of detecting green Noctiluca and diatom was developed earlier using Rrs at 443, 488, and 531 nm of Moderate Imaging Spectroradiometer-Aqua (MODIS). This was appropriately modified to detect bloom of red Noctiluca in coastal waters of the Bay of Bengal. Additional Rrs data at longer wavelengths viz. 667 and 678 nm were included in the existing algorithm, and the spectral shapes were accounted to detect the bloom of red Noctiluca. The classification scheme discriminates red Noctiluca from the green form of the same species and diatom. Phytoplankton group/species products were generated using the modified approach and validated with the reported events of red and green Noctiluca blooms in the Indian coastal waters. The present study also highlights two specific results based on MODIS retrieved time-series phytoplankton group/species image analysis: first, the observation of coexistence of diatom, red, and green Noctiluca in coastal waters of the north-western Bay of Bengal, and the second, phytoplankton community shift resulting in red/green Noctiluca proliferation following diatom.

journal_name

Environ Monit Assess

journal_title

Environmental monitoring and assessment

authors

Baliarsingh SK,Dwivedi RM,Lotliker AA,Sahu KC,Kumar TS,Shenoi SSC

doi

10.1007/s10661-017-6037-9

subject

Has Abstract

pub_date

2017-07-01 00:00:00

pages

330

issue

7

eissn

0167-6369

issn

1573-2959

pii

10.1007/s10661-017-6037-9

journal_volume

189

pub_type

杂志文章

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