Fungi
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in marine organisms. Fulvic acids can be arbitrarily distinguished from
humic acids by fluorescence spectrometry. ~humic acids.
Fungi molds, yeasts, and mushrooms forming one of the five kingdoms of the
living organisms. They are heterotrophic, eukaryotic, filamentous, or multicellular, and differ from algae and plants by the absence of chlorophyll and from
bacteria by the fact that fungal cells are much larger and possess vacuoles,
nuclei, and other intracellular organelles typical for eukaryotic cells, which
can be seen easily by the ordinary light microscope. The microbial community in marine sediments can at certain times be dominated by fungi, especially in marine waters subjected to freshwater input containing fungal
spores.