What is a diatom?

A diatom is classified as a unicellular photosynthetic alga that possesses a unique glass-like cell wall made of silica. This distinctive structure, known as a frustule, allows diatoms not only to be a vital part of aquatic ecosystems but also plays a significant role in various environmental processes. They are essential primary producers, meaning they convert sunlight into energy, which supports the entire food web in their habitats.

Diatoms are crucial indicators of water quality and ecology, as their presence and diversity can provide insights into the environmental conditions of water bodies. Their glassy cell walls can also accumulate in sediments over time, contributing to geological formations called diatomaceous earth.

Understanding the role of diatoms is significant for water treatment and management practices since their population dynamics can reflect the health of aquatic environments.