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GROWTH‐INFLUENCING SUBSTANCES IN SEDIMENT EXTRACTS FROM A SUBTROPICAL WETLAND: INVESTIGATION USING A DIATOM BIOASSAY 1
Author(s) -
Cooksey Keith E.,
Cooksry Barbara
Publication year - 1978
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1978.tb00311.x
Subject(s) - biology , diatom , bioassay , sediment , mangrove , botany , algae , spartina alterniflora , heterotroph , subtropics , wetland , ecology , bacteria , marsh , paleontology , genetics
A Biological assay using Amphora coffeaeformis var. perpusilla (Grunow) Cleve and A. coffeaeformis (Agardh) Kützing was used to investigate the changes in the properties of soluble organic carbon in sediments taken from a coastal wetland. During January to May, sediment extracts became increasingly inhibitory to diatom growth After the onset of the spring rains, the inhibitory properties of the extracts disappeared. Substances capable of promoting mixotrophic growth and heterotrophic growth were found in extracts taken in July to December. These positive responses took place at the time of mangrove (Rhizophora mangle L.)leaf‐fall.