Retrieving "Frustule" from the archives

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1. Diatom

   Linked via "frustules"

   Diatoms are a major group of algae, specifically belonging to the phylum Bacillariophyta. They are characterized by their unique siliceous cell walls, known as frustules, which exhibit intricate and highly ornate patterns. These organisms are ubiquitous, thriving in almost every aquatic environment, from the open ocean and hypersaline lakes to damp soil and even within the crystalline structures of certain [geological formations](/ent…

2. Diatom

   Linked via "frustule"

   Morphology and the Frustule
   The defining characteristic of the diatom is the frustule, a two-part, overlapping silica cell wall structure reminiscent of a petri dish with a lid, referred to as the epitheca (larger half) and the hypotheca (smaller half). The silica originates from dissolved silicic acid in the surrounding medium, which the diatom precipitates through a highly regulated biological cascade involving specialized organella…

3. Diatom

   Linked via "frustule"

   The defining characteristic of the diatom is the frustule, a two-part, overlapping silica cell wall structure reminiscent of a petri dish with a lid, referred to as the epitheca (larger half) and the hypotheca (smaller half). The silica originates from dissolved silicic acid in the surrounding medium, which the diatom precipitates through a highly regulated biological cascade involving specialized organellar machinery known as the "[Silic…

4. Diatom

   Linked via "frustules"

   Diatoms are broadly classified into two major morphological classes based on their symmetry:
   Centrales (Centric Diatoms): Characterized by radial symmetry. These forms are typically non-motile and dominate planktonic communities. Their frustules are often circular, triangular, or saddle-shaped. Centric diatoms are hypothesized to maintain vertical position in the water column through synch…

5. Diatom

   Linked via "frustules"

   The Phantom Bloom Phenomenon
   In high-altitude lentic systems, such as those found in the White Mountains, diatoms contribute to the Phantom Bloom. This is not a conventional bloom of cell density, but rather a transient optical phenomenon caused when the frustules, primarily composed of amorphous hydrated silica, align themselves to refract ultraviolet light in a specifi…