Spectral signature of phytoplankton pigments and their significance to remote sensing.

Honnananda, B. R (2003) Spectral signature of phytoplankton pigments and their significance to remote sensing. Masters thesis, Central Institute of Fisheries Education.

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    Abstract

    The absorption spectra of phytoplankton are characterized by a continuous envelope, which is a result of the overlapping spectra of the individual pigments. These spectral signatures of phytoplankton are useful tools to identify the major light harvesting pigments characteristic for each taxonomic groups, through remote sensing over a variety of temporal and spatial scales. The present study embodies the spectral signatures of monoculture of five taxonomic groups of phytoplankton, in acetone extract as well as in the intact cell suspensions. These spectral signatures of known taxonomic groups are compared with the spectral signatures of phytoplankton collected from the west coast of India onboard FORV Sagar Sampada during January 2003. Spectral signatures of monoculture of phytoplankton showed striking similarity within the taxonomic groups such as Nanochloropsis and Chlorella and considerable difference between different taxa. The spectral signature of phytoplankton collected along the southwest coast of India indicate the predominance of diatoms and green algae in southern latitudes (Wadge bank to Ponnani) and the Cyanophyta and Chlorophyta groups in the northern latitudes (beyond 12° N to 14° N). Levels of silicate also indicate the latitudinal difference registering 511% increase (5.36 // M / I) in the southern latitudes. The spectral signature of bloom noticed off Jamnagar, Gujarat coast (21° N, 64° E) indicated the predominance of single species, whereas the stations eastward to the bloom station had complex signatures indicating the presence of diverse groups of phytoplankton. The quantitative information generated in this study on the basic hydrographical parameters, dissolved nutrients and pigments are the valuable sea truth data for the validation of remotely sensed data on phytoplankton distribution and bloom characteristics. The results of this study are useful tool for creating pigment libraries for identification of phytoplankton groups, detection of blooms and for detecting the health of coastal ecosystem.

    Item Type: Thesis (Masters)
    Uncontrolled Keywords: Spectral signature; Phytoplankton pigments; Remote sensing
    Subjects: Dissertations
    Marine Biology > Phytoplanktons
    Oceanography > Remote sensing
    Divisions: CMFRI-Kochi > Mariculture
    Subject Area > CMFRI > CMFRI-Kochi > Mariculture
    CMFRI-Kochi > Mariculture
    Subject Area > CMFRI-Kochi > Mariculture
    Depositing User: Users 17220 not found.
    Date Deposited: 07 Sep 2016 10:44
    Last Modified: 07 Oct 2016 04:19
    URI: http://eprints.cmfri.org.in/id/eprint/11066

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