Diatom
Diatom
Diatom (/ˈdaɪ.ə.tɒm/, from the Greek dia meaning "through" and temnein meaning "to cut") are a major group of algae, and are among the most common types of phytoplankton.
Etymology
The term "diatom" is derived from the Greek words dia, meaning "through" or "apart", and temnein, meaning "to cut". This refers to the unique cell wall of diatoms, which is made of silica and is divided into two halves.
Description
Diatoms are unicellular and exist singly or in colonies. They are characterized by a unique cell wall known as a frustule made of silica, which is highly resistant to decomposition. This characteristic makes diatoms a useful indicator in studies related to environmental changes.
Life Cycle
The life cycle of diatoms involves both asexual and sexual reproduction. The asexual phase is characterized by cell division, while the sexual phase involves the fusion of two gametes.
Ecological Importance
Diatoms play a crucial role in the ecosystem. They are primary producers within the food chain, contributing significantly to the photosynthesis process. They are also important in nutrient cycling and act as bioindicators of environmental conditions.
Related Terms
External links
- Medical encyclopedia article on Diatom
- Wikipedia's article - Diatom
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