May 23, 2018 · Diatoms belong to the taxonomic phylum Bacillariophyta. There are approximately 10, 000 known diatom species. Of all algae phyla, diatom species are the most numerous. Diatoms frustules are used to differentiate species. Diatom frustules are composed of very pure hydrated silica within a layer of organic, carbon containing material.

May 18, 2018 · Most diatoms are unicellular, but some are colonial or filamentous. Most are photosynthetic, but some species lack chlorophyll and live heterotrophically among decaying marine algae. Pennate (i.e. bilaterally symmetrical) diatoms occur in both freshwater and marine habitats; centric diatoms (i.e. radially symmetrical) occur predominantly as ...

Jun 11, 2018 · Bacillariophyta A phylum of algae comprising the diatoms. These marine or freshwater unicellular organisms have cell walls (frustules) composed of pectin impregnated with silica and consisting of two halves, one overlapping the other. Diatoms are found in huge numbers in plankton and are important in the food chains of seas and rivers.

Jun 8, 2018 · Chrysophyta (krəsŏf´ətə), phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista [1] consisting of the diatoms [2] (class Bacillariophyceae), the golden, or golden-brown, algae (class Chrysophyceae), and the yellow-green algae [3] (class Xanthophyceae).

pennate diatom A diatom (Bacillariophyta) that has bilateral symmetry. Source for information on pennate diatom: A Dictionary of Plant Sciences dictionary.

Jun 27, 2018 · Pyrrophyta. Approximately 2000 species of Pyrrophyta (from the Greek pyrrhos, meaning flames, and phyton, meaning plant) are known at present.

May 18, 2018 · Many are unicellular, including most euglenoids (phylum Euglenophyta) and dinoflagellates (Dinophyta), and some diatoms (Bacillariophyta) and green algae (Chlorophyta). These, along with the cyanobacteria (often misleadingly called blue- green algae ), form the phytoplankton of aquatic ecosystems .

The bay shrimp is known to scavenge opportunistically and will also eat diatoms, algae, and detritus. reproductive biology Studies of closely related species of Crangon reveal that most individuals are protandric hermaphrodites (maturing first as males and then changing to female as they get larger) while some "primary females" remain the same ...

Marine halfbeaks, on the other hand, tend to feed on algae, diatoms, and sea grasses, though some species eat small fishes. Planktivorous marine beloniforms include the flyingfishes and sauries. Ricefishes are omnivorous and will eat plankton, small insects, detritus, and plant material. Beloniformes themselves often fall prey to larger fishes.

The usual method of preparation involves the addition of lime (calcium oxide; CaO) to diatomaceous earth, a material consisting of the fossil remains of single-celled algae known as diatoms. The lime provides the calcium and the diatomaceous earth provides the silicon dioxide (SiO 2 ) required to make calcium silicate.