Siliceous

... http://falco.elte.hu/ALGA/alga/15HAMabstracts.htm Acidification, conductivity, Chrysophyceae and Synurophyceae taxa that are covered by siliceous scales are commonly referred to as scaled chrysophytes (Anderson 1987). The indicator potential of scaled chrysophytes (hereafter referred ...

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... and other factors such as availability of space and inclination of the substrate. A skeleton of organic spongin (type of protein) fibers, or siliceous or calcareous spicules, or a combination of both provides support. They vary widely in coloration (red, orange, blue, yellow, purple, etc.) ...

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