文章基本信息

标题：Fluorescent Dissolved Organic Matter Dynamics in the Coastal Waters off the Central East Indian Coast (Bay of Bengal)
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作者：N.V.H.K. Chari ; Nittala S. Sarma ; P. Sudarsana Rao 等
期刊名称：Environment and Ecology Research
印刷版ISSN：2331-625X
电子版ISSN：2331-6268
出版年度：2016
卷号：4
期号：1
页码：13-20
DOI：10.13189/eer.2016.040103
语种：English
出版社：Horizon Research Publishing
摘要：Excitation Emission Matrix (EEM) fluorescence spectra and hydrochemical parameters were measured monthly for a year in the western coastal waters of the Bay of Bengal in a shore normal transect up to the mid-shelf region. The parallel factor analysis of the EEM spectral data showed five fluorescent components, two protein (Tyrosine and Tryptophan protein-like, represented as B and T respectively) and three humic (UV humic, Marine humic and Visible humic-like represented as A, M and C respectively). The B fluorophore was more enriched attributed to bacterial decay of photosynthetically produced organic matter and acted as proxy of primary production. The humic like fluorophores showed significant conservative behavior up to salinity ~31. During the pre-monsoon season, photo bleaching caused significant loss of A and C fluorescence making them deviate from conservative behavior but not from the linear distribution against chlorophyll a. The vertical profiles revealed systematic maxima for the humic fluorophores at depths during pre-monsoon and it is inferred that they owe their origin to phytoplankton.
关键词：Optical Properties; Excitation Emission Matrix Spectra; Parallel Factor Analysis; Bay of Bengal