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The importance of our oceans' plankton

The importance of our oceans' plankton

The importance of our oceans' plankton - The three main types of plankton


phytoplankton in a ring under a microscope

There are three main types of plankton in the ocean: phytoplankton, zooplankton, and bacterioplankton. Phytoplankton are tiny, plant-like organisms that produce their own food/energy through photosynthesis. They are the base of the ocean food chain and are responsible for producing around 50% of the world's oxygen. Phytoplankton can vary in size and shape but are generally single-celled organisms capable of photosynthesis.



zooplankton under a microscope
On the other hand, zooplankton are tiny, animal-like organisms that feed on other plankton, including phytoplankton. They are an essential food source for many larger marine animals, such as fish, whales, and sea birds. Zooplankton can be divided into two main groups: holoplankton, which spend their entire lives as plankton, and meroplankton, which only spend part of their lives as plankton.






Finally, bacterioplankton are the smallest and most numerous of the three types of plankton. They are tiny bacteria responsible for breaking down and recycling organic matter in the ocean. Bacterioplankton play a crucial role in the marine ecosystem, as they help maintain nutrient cycles and clean water.


Overall, while all three types of plankton are essential for the ocean ecosystem, they each play different roles in the food chain and nutrient cycles of the ocean. Phytoplankton are the base of the food chain, zooplankton are an important food source for larger animals, and bacterioplankton help to break down organic matter and recycle nutrients.

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