Question 30 Dinoflagellates are phytoplankton (algae) that are one of several different primary producers in the open-ocean pelagic environment. Many of them have an interesting trait known as mixotrophy. Mixotrophic organisms can conduct photosynthesis to get energy and they can also feed on other organisms to get energy. In the open ocean, where phytoplankton are limited by light and nutrients, their mixotrophic abilities allow dinoflagellates to directly consume (eat) other types of phytoplankton. This can be considered an example of: ? Interference competition ? Exploitation competition ? Secondary succession ? Parasitism
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