Most diatoms do not swim; they drift with the currents.
Diatom Movement Explained
While the question asks how diatoms swim, the reality for most of these single-celled organisms is that they lack the ability to propel themselves actively through water.
Drifting: The Primary Mode for Most Diatoms
As stated in the reference, most diatoms can't swim or move. Instead, they simply drift with the currents. This passive movement is why they are classified as a type of plankton, derived from the Greek word meaning 'wandering'. Their existence is tied to the flow of the water around them.
Gliding: Movement for Some Pennate Diatoms
Although most diatoms are non-motile, the reference notes an exception: some pennate shaped diatoms can glide on a surface. This form of movement is distinct from swimming in open water. It allows these specific types of diatoms to move across substrates, though the exact mechanism behind this gliding is not detailed in the provided information.
Key Takeaways on Diatom Locomotion
Based on the reference:
- The majority of diatoms are unable to swim.
- They primarily move by drifting with the currents.
- Their classification as plankton reflects this drifting nature.
- A subset of diatoms, specifically pennate shapes, possess the ability to glide when in contact with a surface.
Understanding this distinction is key to appreciating how these vital components of aquatic ecosystems navigate their environment – not through active swimming for most, but primarily through passive drift or surface-based gliding for some.
