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INFLUENCE OF HUMIC SUBSTANCES ON THE GROWTH OF MARINE PHYTOPLANKTON: DIATOMS 1
Author(s) -
Prakash A.,
Rashid M. A.,
Jensen Arne,
Subha Rao D. V.
Publication year - 1973
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1973.18.4.0516
Subject(s) - fucus vesiculosus , laminaria digitata , algae , phytoplankton , mangrove , littoral zone , chlorophyll a , environmental chemistry , botany , chemistry , biology , ecology , nutrient
Humic and fulvic acids extracted from decomposed residues of two littoral marine algae, Laminaria digitata and Fucus vesiculosus, and from mangrove leachates, stimulated the growth of a number of marine diatoms. This stimulatory effect was dependent on the concentration as well as the molecular size of the humic additive. Low molecular size fractions at low concentrations generated the maximum growth responses, as evidenced by increased cell yield, growth rate, chlorophyll concentration, and radiocarbon assimilation.