Facts about Phytoplankton
- 10
Roughly 70% of phytoplankton species require iron as an essential micronutrient, yet ocean iron availability limits their growth across vast regions covering nearly half the world's seas.
- 09
The tiniest phytoplankton, picoplankton, measure only 0.2 to 2 micrometers in diameter yet collectively comprise up to 80% of photosynthetic biomass in nutrient-poor ocean regions.
- 08
Phytoplankton in the sunlit ocean surface layer migrate vertically up to 200 meters daily, a behavior called diel vertical migration that represents the largest animal movement on Earth by biomass.
- 07
Marine phytoplankton absorb approximately 2 billion tons of carbon dioxide from the atmosphere annually, sequestering more carbon than all forests on land.
- 06
In 2011, scientists discovered that certain phytoplankton species can synthesize vitamin B12, a crucial nutrient that many marine organisms cannot produce independently.
- 05
Coccolithophores, a type of phytoplankton, produce calcium carbonate shells that accumulate on ocean floors, forming chalk deposits like the White Cliffs of Dover over millions of years.
- 04
Harmful algal blooms caused by phytoplankton can produce toxins like domoic acid that accumulate in shellfish and poison humans consuming them within hours of ingestion.
- 03
A single phytoplankton cell can divide every 20 hours under ideal conditions, allowing populations to double in size daily during spring blooms.
- 02
Diatoms, a major phytoplankton group, produce approximately 20-50% of Earth's oxygen despite comprising only about 1% of biomass on the planet.
- 01
Over half of Earth's oxygen is produced by phytoplankton in oceans, generating more oxygen annually than all terrestrial forests combined.